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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.
<strong>Start Here:<br /><br /></strong>Mitchell, R.H., 2014, Primary and secondary niobium mineral deposits associated with carbonatites: Ore Geology Reviews, v. 64, p. 626-641, 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><br /><br /><ul><li>Focuses specifically on the formation of niobium in carbonatites but includes an excellent baseline description of carbonatites.</li>
</ul><strong>Additional Resources:<br /><br /></strong>Nash, W.P., 1972, Mineralogy and Petrology of the Iron Hill <span class="search-result-highlight">Carbonatite</span> Complex, Colorado: Geological Society of America Bulletin, <span class="cit-vol"><span class="cit-sep cit-sep-before-article-vol">v. </span>83<span class="cit-sep cit-sep-after-article-vol">, p. </span></span><span class="cit-pages"><span class="cit-first-page">1361</span><span class="cit-sep">-</span><span class="cit-last-page">1382</span></span>, doi: 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><br /><br /><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., <span>1965, C<span>arbonatite and related alkalic rocks at powder horn, Colorado: <span>Economic geology and the bulletin of the Society of Economic Geologists, v. 60, p. <span>672-692, doi: 10.2113/gsecongeo.60.4.672. <a title="Full Article" href="http://dx.doi.org/10.2113/gsecongeo.60.4.672.">Full Article.</a><br /><br /></span></span></span></span>
<ul><li>Basic information regarding the structure, geochemistry, and petrogenesis of the Powderhorn Carbonatite.</li>
</ul><br />Van Gosen, B. S., Lowers, H. A., 2007, Iron Hill (Powderhorn) carbonatite complex, Gunnison County, CO; a potential source of several uncommon mineral resources: Mining Engineering, v. 59, p. 56-62, doi: N/A <a title="Abstract" href="http://me.smenet.org/abstract.cfm?articleID=1143&page=56">Abstract.</a><br /><br /><ul><li>Mineral resource potential: titanium, iron, vermiculite, vanadium, and nephaline. </li>
</ul><br />Olson, J.C., Hedland, D.C., <span>1981</span>, <span>Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado</span>: <span>USGS Numbered Series</span>, Professional Paper , v. <span>1049, <span>p. C1-C34</span>Â </span>Â doi: N/A. <a title="Full Article" href="http://pubs.usgs.gov/pp/1049c/report.pdf">Full Article.</a><br /><br /><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.