1 20 21 https://geosciencecollections.milne-library.org/files/original/1e27e573437aaa11897ddf5f09362524.pdf 9eacb510e84c0e5645f1ba0f2875261c Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Document A resource containing textual data. Note that facsimiles or images of texts are still of the genre text. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Powderhorn Carbonatite Western Minerals Supplementary Materials Description An account of the resource OCR PDF of supplemental information for the Powderhorn Carbonatite collection. Creator An entity primarily responsible for making the resource Western Minerals Inc. Publisher An entity responsible for making the resource available Western Minerals Inc. Date A point or period of time associated with an event in the lifecycle of the resource no date Date Copyrighted Date of copyright. no date Has Format A related resource that is substantially the same as the pre-existing described resource, but in another format. PDF Identifier An unambiguous reference to the resource within a given context PHsuite Spatial Coverage Spatial characteristics of the resource. Powderhorn, Colorado https://geosciencecollections.milne-library.org/files/original/524c33a6da8216124d5c914c39c35af5.JPG 4de3be3b2e6ea45da1b055a803f668da Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Pyroxenite https://geosciencecollections.milne-library.org/files/original/fbddeb5a371681da7b988dd584b3b80b.JPG 271b0dee7496288932930507787f8c4d Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/7148cad8e88782e8502b20274ced8124.JPG babe2aa4689e22d8c867e3f19cf7708f Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Thin Section in PPL. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 2 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Pyroxenite Description An account of the resource Coarse pyroxenite, with traces of nepheline. This is the freshest pyroxenite that was found. It occurs near the nepheline syenite body in the eastern part of the complex. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-1 Spatial Coverage Spatial characteristics of the resource. Powderhorn, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. https://geosciencecollections.milne-library.org/files/original/cd8917a3fec07f27e1c1abb108ff5d7f.JPG 3b71060dfcb5b45e8db137b445d69e0a Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-2. https://geosciencecollections.milne-library.org/files/original/7448ac119c7af7fde468970027d4fbc4.JPG 8ba04b93de102851ba40a1d26fa8b930 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/44e2718b86481c946d7f9210f9e69f4d.JPG 86c731b10528a8561d1aff9e6bab9160 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Thin Section in PPL. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Gneiss (Fenitized) Description An account of the resource Fenitized Gneiss. Gneiss discovered in direct contact with pyroxenite in prospect trench on ridge, about 500 ft. west of PH-1.. . Date A point or period of time associated with an event in the lifecycle of the resource no date Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-2 Spatial Coverage Spatial characteristics of the resource. Powderhorn, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. https://geosciencecollections.milne-library.org/files/original/f18b995d1fd2d8b05ea764dc1a156bf5.JPG 653b58c57d11248d841fcac03406e7ab Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-3. https://geosciencecollections.milne-library.org/files/original/a875dd7bc15c4259cb7def72a85364c8.JPG bc416af23a6ce3d3618097f92510173d Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/2457fee808a6789b1f877907ee6e825f.JPG 2be6356ba15e519fa536f69a8d492e37 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Thin Section in PPL. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Nepheline syenite Date A point or period of time associated with an event in the lifecycle of the resource no date Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-3 Spatial Coverage Spatial characteristics of the resource. Powderhorn, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource Nepheline syenite that outcrops on west side of trail at about 9200 ft. on east side line of section. https://geosciencecollections.milne-library.org/files/original/a01c78b36f39c3d7cd60894f7694b6c2.JPG 4a4ee9812bc541f5984aca3ea064f038 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-4. https://geosciencecollections.milne-library.org/files/original/b2d4ccc8f47e369f62d4fa2993aab480.JPG 56bf2b87e7a5c01fb34755bab3aeae9d Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/c56de9571e1666e1b8bf3bb8a0aa1cc4.JPG d519ea57928d31967adba64221e4779e Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Thin Section in PPL. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Nepheline syenite Description An account of the resource Nepheline Syenite. Thin, dark vein runs through the center body of the rock. Date A point or period of time associated with an event in the lifecycle of the resource no date Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-4 Spatial Coverage Spatial characteristics of the resource. Powderhorn, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. https://geosciencecollections.milne-library.org/files/original/006580ed61c4cd98312b2a9ab00281f1.JPG 126731cbea863a8a98f5a9f66eab72ed Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-5 Hand Sample. https://geosciencecollections.milne-library.org/files/original/b1b1f2d05b08cdd08553d5775cb683fb.JPG 8d4295e2dfd96a78ddbd146265f17996 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-5 Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/c42185ca7615634641e542c0dfa6c622.JPG e25700c79beaf27e7b7df57ed13304ea Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-5 Thin Section in PPL. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Carbonatite Description An account of the resource White Carbonatite. Found on Southwest side of the main rock unit body on North side of Beaver Creek about 1/4 mi. Date A point or period of time associated with an event in the lifecycle of the resource no date Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-5 Spatial Coverage Spatial characteristics of the resource. Beaver Creek, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. https://geosciencecollections.milne-library.org/files/original/1944453ff8c5303e254aafa47beca059.JPG aca070038e07179fcf9bded240f2fe6e Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-6 Hand Sample. https://geosciencecollections.milne-library.org/files/original/ee6696d106a31aa23f719673b586adf5.JPG eef608ad5d095dad8005b8db2995d910 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-6 Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/e0d82c941162f6bd1a68a3e94864535e.JPG 4bc83074d7aa14f57c41054833c8b89c Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-6 Thin Section in PPL. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Ijolite Date A point or period of time associated with an event in the lifecycle of the resource no date Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-6 Spatial Coverage Spatial characteristics of the resource. Powderhorn, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource Recently exhumed ijolite from shallow bulldozer cut. Hand Sample: Shows traces of iron oxidation in isolated areas. Small (> 0.5 mm in diameter) nodules, with the appearance of small sand grains appear in clusters on one face of the rock (not featured in hand sample image). https://geosciencecollections.milne-library.org/files/original/32a8c19bcc401b3c7a874a1e38a5d5ac.JPG 5c52331acc239bc6ac675fcd560ac020 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-7 Hand Sample. https://geosciencecollections.milne-library.org/files/original/13f2635247793908bf5465275b25df55.JPG 4bb24b9816daafb743eccd04292594c0 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-7 Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/c0d61cb11c9e51cb1ec109b28a38c0e5.JPG d746cac068f19b14894cb095a1a3c8bb Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-7 Thin Section in PPL. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Ilmenite. Description An account of the resource Hand Sample: Composed entirely of Ilmenite. Date A point or period of time associated with an event in the lifecycle of the resource no date Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-7 Spatial Coverage Spatial characteristics of the resource. Powderhorn, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. https://geosciencecollections.milne-library.org/files/original/6c828d99b676a733752e652e01df0b8a.JPG e0d6b7a315523f891fffa9b41fde49ff Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-8 Hand Sample. https://geosciencecollections.milne-library.org/files/original/c00f03dce1d6cad0397b0c3f210b4485.JPG 8b662679d3fe2fe0a4bdd31a0032216a Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-8 Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/5c0c220278042b17e97a8f520a850da8.JPG b6a42fd994d3f7604f305d367a7692eb Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-8 Thin Section Image in PPL. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 2 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Pyroxenite Description An account of the resource Hand Sample: Rock is comprised predominately of a dark fine grained matrix. Some specimens have minor amounts of pink K-feldspar. Clusters of biotite (~1 cm in diameter) appear on one face of the rock. Date A point or period of time associated with an event in the lifecycle of the resource no date Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-8 Spatial Coverage Spatial characteristics of the resource. Deldardo Creek, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. https://geosciencecollections.milne-library.org/files/original/f0a7aaa72da3faa9992c145430ccc0de.JPG 8d50b45ee4e49da5943be7da7ee25841 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-9 Hand Sample. https://geosciencecollections.milne-library.org/files/original/903c937fffccde72cea3ac891de05f90.JPG 7489b21090a5bbde490f4d10835d01e0 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-9 Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/9d1f9026d35ee60129947ac018711a8e.JPG 052eb5a78798477fb1eae70c7b5e5b4c Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-9 Thin Section in PPL. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Gabbro Description An account of the resource Coarse gabbro, extracted from the southern dike of two east-west dikes N of Deldardo Creek. Hand Sample: Evenly distributed dark, light, and white colored coarse-grained (1 mm) crystals. Obvious traces of oxidation from some metallic mineral on each surface of the rock. Date A point or period of time associated with an event in the lifecycle of the resource no date Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-9 Spatial Coverage Spatial characteristics of the resource. Deldardo Creek, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. https://geosciencecollections.milne-library.org/files/original/7f5e1ae16c57a8913e938dbc912432cf.JPG c0c9ad8705a33da56c195d66c84f2aea Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-10 Hand Sample. https://geosciencecollections.milne-library.org/files/original/01788529f1cbd433622dc7d13ea0977b.JPG 62c0ab92aa162f912de8642239c417af Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-10 Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/d51f80d6e8a2982fbd0546be7ede4852.JPG c4bb5b25ce4b33a1f989462b0e5309df Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-10 Thin Section in PPL. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Porphyroblasic gneiss (Fenitized) Date A point or period of time associated with an event in the lifecycle of the resource no date Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-10 Spatial Coverage Spatial characteristics of the resource. Huntsman Gulch, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource Fenitized porphyroblastic Gneiss. Hand Sample: Entirely coarse-grained rock except for 2 cm wide dark fine grained band. Obvious traces of oxidation appear on all sides, dominating the most weathered sides of the rock. https://geosciencecollections.milne-library.org/files/original/5d64e8f1016a565cb47e0a185c021916.JPG b06a161a95a933acd76c5e309ac58c16 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-11 Hand Sample. https://geosciencecollections.milne-library.org/files/original/bf1fa280d7a460c17b2d80ade6e36c43.JPG 8faf6253d32aa37a490d109b72e23284 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-11 Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/5a1f42d639c413e9bcb13a82f23926e8.JPG f126354df705b80fd4623c06ec5602c3 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-11 Thin Section in PPL. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Carbonatite Description An account of the resource Light brown to almost off-white fine grained Carbonatite. Delicated Barite appears in very thin layers on one side of the rock. Date A point or period of time associated with an event in the lifecycle of the resource no date Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-11 Spatial Coverage Spatial characteristics of the resource. Powderhorn, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. https://geosciencecollections.milne-library.org/files/original/cdb6a0892c4129f31cb6748b11e05af1.JPG 83f7268baed461dbc83ff1c5ad2dd742 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-12 Hand Sample. https://geosciencecollections.milne-library.org/files/original/28e105828ad970350939b50cf2d43201.JPG 348c176fbe0139045bedbeaa8f42c1d9 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-12 Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/cf28b2c256ce2010c301b95545946626.JPG 1720a2df887d63c6c94f6e77a2c8b7f5 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-12 Thin Section in PPL. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Chert Date A point or period of time associated with an event in the lifecycle of the resource no date Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-12 Spatial Coverage Spatial characteristics of the resource. Powderhorn, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource Chert sample found in a Carbonatite. Hand Sample: Pink to light brown chert sample that contains small (< 1 mm diameter) vesicles. Very thin quartz veins propagate through the sample in no preferred orientation. https://geosciencecollections.milne-library.org/files/original/cc5fd3cbb6088b005c0c61e44d63c9e0.JPG 310a6573dd99d556e9b446aa01c9cd56 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-13 Hand Sample. https://geosciencecollections.milne-library.org/files/original/2f3ea356a18b786108c37ef31d61dc2a.JPG 37b06512559d01ae721e96c009e21da4 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-13 Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/ef8564cb27814547c62303fe15361403.JPG 91447fc65b19e7789e62acba238bed91 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-13 Thin Section in PPL. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 2 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Pyroxenite Description An account of the resource Hand Sample: Coarse grained pyroxenite showing heavy traces of oxidation on every weathered face of the rock. Large clusters (5-8 mm) of biotite appear throughout the rock. Date A point or period of time associated with an event in the lifecycle of the resource no date Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-13 Spatial Coverage Spatial characteristics of the resource. Powderhorn, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. https://geosciencecollections.milne-library.org/files/original/88b47dc6ce2173dcf681537a09f00355.JPG f02bb6554d40f8509891f89aa1ce8a51 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-14 Hand Sample. https://geosciencecollections.milne-library.org/files/original/ecb83388847a0f6c84c11f0b9551c7c5.JPG 16027b1c91894a53ea4955473ad09624 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-14 Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/52575ecc06e033deb7a08f89a1a32a28.JPG 946e9f3f088015c3e69bffb12515d5b1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-14 Thin Section in PPL. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Melilite-bearing rock Description An account of the resource Hand Sample: Large (1 cm-2 cm) dark grey to translucent quartz crystals comprise the matrix of the rock. Melilite minerals propagate consistently paralell to one another throughout the rock. Date A point or period of time associated with an event in the lifecycle of the resource no date Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-14 Spatial Coverage Spatial characteristics of the resource. Powderhorn, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. https://geosciencecollections.milne-library.org/files/original/03edb46d8e6627084fbde1e709ecb77b.JPG 3371422509100dd4827c8cdc85e6a4d6 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-15 Hand Sample - Front View. https://geosciencecollections.milne-library.org/files/original/8e2808a589dc265afcb73a5651ee91e9.JPG b39d9a1ac207f2cffa55f1d214f0ecd8 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-15 Hand Sample - Side View. https://geosciencecollections.milne-library.org/files/original/88c7cd1aa00700df969983eb693c278e.JPG 48a77298893d6729877ac76919b33d74 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-15 Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/187b58653448cec413d50b4058cac999.JPG e3d17d0d05239749d8edc1881c5029ae Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-15 Thin Section in PPL. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Uncompahgrite Date A point or period of time associated with an event in the lifecycle of the resource no date Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-15 Spatial Coverage Spatial characteristics of the resource. Powderhorn, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource Hand Sample: Three hand samples from different facies were collected to represent this sample. Out of two of the largest samples one is a dark fine grained rock while the other is coarse grained. Both contain large (5-8 mm) clusters of biotite. https://geosciencecollections.milne-library.org/files/original/1da4b97d7170a06dde14910b0d139246.JPG 2562275d9269c8a5eaa1c5d74fb7caa4 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-16 Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/d3ea0aeddfca3023a3e2a0d187586c37.JPG e130bfde3f83d7f9d0f6ae42f101d12e Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-16 Thin Section in PPL. https://geosciencecollections.milne-library.org/files/original/6ccf62a1a5286a8164f134e72fd6e572.jpeg c1bff5a7483426122480588e76af2599 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-16 Hand Sample - Horizontal. https://geosciencecollections.milne-library.org/files/original/110f7981dbb5fda20bfb6faf46e82c48.jpeg 1e9a35c4af3e99301c379c85a23844f5 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-16 Hand Sample - Horizontal. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Melilite-bearing rock Date A point or period of time associated with an event in the lifecycle of the resource no date Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-16 Spatial Coverage Spatial characteristics of the resource. Beaver Creek, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource Hand Sample: The rock is largely comprised of a very fine grained light green matrix with large (1 x 3 cm) black equant galena crystals. It's pretty magnificent. https://geosciencecollections.milne-library.org/files/original/71818eeecf4b873246f9487eb82d8ceb.jpeg a356abf24bb6aea1d3f54931ba7a9d54 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-17 Hand Sample - Horizontal. https://geosciencecollections.milne-library.org/files/original/8e0ba7e9db461dd4bac70edec96c4fb1.JPG 88342df0ab5a7a78610a972ca982a776 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-17 Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/012a18dc4c521965beb02ab06d059391.JPG d49dcb8171a03e47160b0286a08d07a4 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-17 Thin Section in PPL. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Ijolite Date A point or period of time associated with an event in the lifecycle of the resource no date Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-17 Spatial Coverage Spatial characteristics of the resource. Powderhorn, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource Hand Sample: Rock is comprised almost entirely K-Feldspar. https://geosciencecollections.milne-library.org/files/original/7ea2317a3933749fe712dcab68ccbecc.JPG ba75ef963862c0fd98bdc90093cff6c1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-18 Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/5d9865f19114ce148151d01e0f9ec786.JPG afdf29321f2f4237c812b880973f5aa3 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-18 Thin Section in PPL. https://geosciencecollections.milne-library.org/files/original/1b45bdc6ad1c622006a92c755453b4d3.jpeg 3e5460f538d0d6f98070455e2cb1e9ab Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-18 Hand Sample - Horizontal. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Gabbro Description An account of the resource Dark gabbro dike separating ijolite and uncompahgrite Date A point or period of time associated with an event in the lifecycle of the resource no date Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-18 Spatial Coverage Spatial characteristics of the resource. Powderhorn, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. https://geosciencecollections.milne-library.org/files/original/1d28bd19a1cb845b5799130f9f5cfe0a.JPG 9a2f290708018c4ee22a279ef0df492a Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-19 Thin Section in XPL. https://geosciencecollections.milne-library.org/files/original/2f015a4625df42cf37cc8aed73f04511.JPG 82786e63ce0548b43ce0be0943792fd7 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-18 Thin Section in PPL. https://geosciencecollections.milne-library.org/files/original/7a3903d41c62ba814b057b4a17da8e94.jpeg 01917642eafc6d58a4767c0336313115 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource PH-19 Hand Sample. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (PH) Powderhorn (Iron Hill) Carbonatite Suite -- Gunnison County, SW Colorado Description An account of the resource The Powderhorn (Iron Hill) Carbonatite is located in Gunnison County in about the center of the southwestern quadrant of Colorado. It is a pear-shaped body which is essentially conical at depth, and is exposed over an area of about 12 square miles. The carbonatite body covers about 2 and a half square miles; About 70 percent of the in pyroxenite which was subsequently intruded by or replaced by nepheline and melilite-bearing rocks; magnetite-perovskite, and carbonatite. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites:Â Ore Geology Reviews,Â v. 64, p.Â 626-641,Â doi:10.1016/j.oregeorev.2014.03.010. <a title="Full Article." href="http://dx.doi.org/10.1016/j.oregeorev.2014.03.010">Full Article.</a> <ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li> </ul>Additional Resources: Nash, W.P., 1972, Mineralogy and Petrology of the Iron HillÂ CarbonatiteÂ Complex, Colorado: Geological Society of America Bulletin, v.Â 83, p.Â 1361-1382, doi:Â 10.1130/0016-7606(1972)83[1361:MAPOTI]2.0.CO;2. <a title="Full Article." href="http://dx.doi.org/10.1130/0016-7606(1972)83%5B1361:MAPOTI%5D2.0.CO;2">Full Article.</a> <ul><li>Bulk rock chemistry description & maps/diagrams showing the location of rocks in the Powderhorn Carbonatite.</li> </ul> Temple, R.K., Grogran, R.M.,Â 1965, Carbonatite and related alkalic rocks at powder horn, Colorado:Â Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p.Â 672-692, doi:Â 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a> <ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li> </ul> Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn)Â carbonatiteÂ complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/AÂ <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a> <ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline.Â </li> </ul> Olson, J.C., Hedland, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: USGS Numbered Series, Professional Paper , v. 1049, p. C1-C34Â Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a> <ul><li>Extensive report by the USGS regarding rock type and history of formation (geologic ages).</li> </ul> Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Pyroxenite Date A point or period of time associated with an event in the lifecycle of the resource no date Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/items/show/33">Powderhorn Carbonatite Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context PH-19 Spatial Coverage Spatial characteristics of the resource. Powderhorn, CO Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource Hand Sample: All weathered faces of the rock show heavy traces of oxidation.