Antigoritic Serpentine
Antigorite, magnetite, carbonates (ankerite), diopside, clinohumite, tremolite, chlorite. Rarely, pseudomorphs on primary pyroxenes may be recognized, though there is superimposition of various deformational phases.
no date
Western Minerals Inc.
NAO-16
Antigoritic Serpentine Schist
Antigorite, magnetite, ankeritic carbonate, diopside, tremolite. A very marked subsequent foliation nearly completely obliterates a previous initial foliation.
no date
Western Minerals Inc.
NAO-17
Basaltic Hyaloclastite
Hyaloclastite of basalt with superimposed metamorphism in pumpellyite-prehnite facies.
no date
Western Minerals Inc.
NAO-11
Cumulitic Peridotite
Peridotite, serpentinized, with plagioclase with harrisitic structure.
no date
Western Minerals Inc.
NAO-9
Cumulitic Peridotite
Serpentinized peridotite with plagioclase, olivine, plagioclase, clino-pyroxene, chromite. Secondary minerals include hydrogrossuaria as well as serpentine, chlorite, prehnite.
no date
Western Minerals Inc.
NAO-10
Dolerite
Doleritic basalt with metamorphic overimprinting in prehnite-pumpellyite facies.
Primary minerals: plagioclase, titanaugite, ilmenite, olivine.
Metamorphic paragenesis: albite, pumpellyite, prehnite, sphene, chlorite.
no date
Western Minerals Inc.
NAO-13
Eclogite
Na-clinopyroxene (chloromelanite), almandine garnet, rutile, glaucophanic amphibole, harrisitic hornblende, epidote, ablite, chlorIte. Chloromelanite pseudomorphs on primary pyroxenes and chloromelanitic aggregates in plagioclase; granoblastic garnet, sometimes in rims around the pyroxenes. Diaftoretic phenomena with substitution of harraisite, epidote, albite, chlorite.
no date
Western Minerals Inc.
NAO-14
Ecologitic Rhodingite
Grossular-andradite garnet, diopside, chlorite, sodic pyroxene, vesuvianite, titansphene, opaques. Traces of primitive gabbroid structure with diablastic development of the newlyformed phases and pseudomorphs of sodic pyroxene on primary pyroxenes. The presence of sodic pyroxene is an index of incomplete rhodingitization.
no date
Western Minerals Inc.
NAO-18
Fe-Gabbro
Traces of oceanic metamorphism in greenschist-amphibolitic facies and weak overprint in prehnite-pumpellyite facies.
Metamorphic oceanic paragenesis: dark hornblende, actinolite, chlorite, oligoclase-albite in microfractures or reaction rims on primary minerals.
Retrograde characteristics: prehnite-pumpellyite paragenesis, saussuritized plagioclase, neoformation of prehnite pumpellyite, epidote, chlorite.
no date
Western Minerals Inc.
NAO-4
Gabbro
Gabbro with hydrothermal "oceanic" processes and prehnite-pumpellyite metamorphic overprint.
Plagioclase, clinopyroxene, olivine, ilmenite. metamorphic paragenesis: albite, sericite, chlorite, hematite, sphene, carbonates. Well-preserved relics of pyroxene, sometimes with traces of recrystallization in "oceanic" conditions of high temp. Plagioclase nearly complete saussuritized, only rarely with preserved relics; olivine substituted by chlorite, hematire, carbonates.
no date
Western Minerals Inc.
NAO-15
Meta Fe-Gabbro in blueschist facies
Albite, Na-amphiboles (from Mg-riebeckite to glaucophane, epidote, aegirinic pyroxene, chlorite, ilmenite, tspesphene, apatite, lawsonite. Pseudomorphic relations of the metamorphic paragenesis on the substituted primary phases. Sometimes lawsonite is present with a metastable characteristic.
no date
Western Minerals Inc.
NAO-22
Metagabbro in blueschist facies
Sodic pyroxene, glaucophane, lawsonite, chlorite. Pseudomorphs of sodic pyroxene and glaucophane,chlorite on original augitic pyroxenes; pseudomorphs of lawsonite and glaucophane on original plagioclase.
no date
Western Minerals Inc.
NAO-21
Northern Apennines Ophiolites Western Minerals Supplementary Materials
OCR PDF of supplemental information for the Northern Apennines Ophiolites collection.
Western Minerals Inc.
Western Minerals Inc.
no date
NAOsuite
Occhiadine Metagabbro
Dioritic gabbro with deformational oceanic metamorphism of amphibolitic to greenschist facies and overprinting of prehnite-pumpellite.
Primary phases: plagioclase, clinopyroxene, olivine, ilmenite. Oceanic metamorphic paragenesis: plagioclase, clinopyroxene, green to dark hornblende, actinolite, tremolite, chlorite.
Prehnite-pumpellyite metamorphic paragenesis: plagioclase saussuritization with possible neoformation of pumpellyite, clinozoisite, prehnite, chlorite. Gneissic-occhiadine (augen), with development of banded structure with different composition.
Porphyroclasts of the primary phases surrounded by newly formed granoblastic aggregates; tremolite and chlorite aggregates pseudomorphs of olivine. Very fine-grained neoformation of the phases of the prehnite-pumpellyite facies.
no date
Western Minerals Inc.
NAO-5
Oficalcite
Tectonic-sedimentary breccia of serpentinite modified by hydrothermal events in oceanic environment.
no date
Western Minerals Inc.
NAO-6
Oficarbonatite
Carbonates (calcite and dolomite), chlorites, garnets, diopside, epidote, serpentine, amphiboles. Very variable compositions in same hand specimen. The rock derives from metamorphism of oficalcitic rocks developed at very high pressures and medium temperatures.
no date
Western Minerals Inc.
NAO-20
Olivine Gabbro
Partially serpentinized Olivine Gabbro.
no date
Western Minerals, Inc.
NAO-1
Pillow Basalt
Spilitized pillow basalt with overprinted prehnite-pumpellyite facies metamorphism. Arborescent ophitic to spherulitic texture; ablitized and saussuritized plagioclase, chloritized glass matrix, with occasional epidote.
no date
Western Minerals Inc.
NAO-2
Porphyritic Basalt
Basalt dike in gabbro with prehnite-pumpellyite overprint.
no date
Western Minerals Inc.
NAO-8
Prasinite
Relics of augitic clinopyroxene, albite, actinolite, chlorite, clinozoisite, and sphene. Relics of the clinopyroxene of the original dolerite are in part substituted by chlorite and actinolite in a granoblastic and metablastic matrix of albite, clinozoisite, sphene and chlorite.
no date
Western Minerals Inc.
NAO-19