clinopyroxene


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clinopyroxene

[¦klī·nə·pə′räk‚sēn]
(mineralogy)
The general term for any of those pyroxenes that crystallize in the monoclinic system; on occasion, these pyroxenes have large amounts of calcium with or without aluminum and the alkalies. Also known as monopyroxene clinoaugite.
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The groundmass in these rocks comprises plagioclase (calcic and esinetosodic labradorite), clinopyroxene or brown primary amphibole, biotite, ilmenite, olivine relics in some pyroxene-bearing dykes, rare pyrite in the amphibole-bearing types, and minor quantities of a range of secondary minerals as in the altered rocks.
Geology and petrography of the Nagar Parkar Igneous Complex, southeastern Sindh: the Wadhrai body
We have determined in situ concentrations of 28 trace elements (REE, Ba, Rb, Sr, Th, U, Nb, Ta, Pb, Zr, Hf, Y, Sc, V, Co and Cr) in olivine, plagioclase, orthopyroxene, clinopyroxene, amphibole and phlogopite on two polished thick sections (130 [micro]m) by laser ablation ICP-MS at the Natural History Museum of London, using a New Wave UP193FX gas laser source operating at 193 nm coupled to an Agilent 7500CS ICP-MS.
Mineral chemistry of late Variscan gabbros from central Spain: constraints on crystallisation processes and nature of the parental magmas
Diabase dikes have been extensive but scattered and have green to brown colors that have plagioclase, clinopyroxene and opaque mineral.
Economic geology, petrogeraphy and geochemical dispersion of volcanic rocks in Noorabad ophiolite (Northwest Lorestan, West Iran)
Lavas from SER contain variable abundances of plagioclase, clinopyroxene and olivine phenocrysts, commonly in glomeroporphyritic clusters.
Igneous Rock Associations 11. The geology and petrology of seafloor volcanic rocks of the northeastern Pacific Ocean, Offshore Canada
Mafic minerals (biotite and hastingsitic hornblende with rare clinopyroxene inclusions) account for up to 10 vol% of the rock.
Anorogenic magmatic rocks in the Estonian crystalline basement/Eesti kristalse aluskorra anorogeensed magmakivimid
Strongly opacitized salite to sodic fassaite grains of matrix, rounded in shape and pale green in colour distinctly differ in their composition from clinopyroxene phenocrysts.
Zeolite-bearing trachyandesite from Dobranka, Ceske stredohori Mts.: petrography, geochemistry and amygdale mineralogy
Petrographically, the Lower Angeles corresponds with a vesicular andesitic-basaltic lava, with a hypocristalline porphyritic to glomeroporphyritic texture, with phenocrystals of plagioclase, clinopyroxene, orthopiroxene, olivine and opaque crystals.
Geomorfologia y petrografia de la colada angeles y del cono monte de la cruz, volcan barva, Costa Rica/Geomorphology and petrography of angeles lava flow and the monte de la cruz cinder cone, Barva Volcano, Costa Rica
The mafic rocks are porphyritic to aphyric and consist of calcic plagioclase, clinopyroxene +- olivine or hornblendic amphibole, ilmenite, titanite, and a range of secondary minerals.
Old wine in new bottle: Reinterpretation of the geochemistry of Wadhrai granitoid in Nagar Parkar Igneous Complex, southeastern Pakistan
The phenocrysts of plagioclase or clinopyroxene are larger than 4 mm of long, while the groundmass is fine-grained and less than 0.
Origin and provenance of igneous clasts from late Palaeozoic conglomerate formations (Del Raton and El Planchon) in the Andean Precordillera of San Juan, Argentina
Petrogenetic significance of orthopyroxene-free garnet + clinopyroxene + plagioclase [+ or -] quartz-bearing metabasites with respect to the amphibolite and granulite facies, Journal of Metamorphic Geology.
Pressure-temperature path of Arquia Group rocks (NW Colombia): a petrographic analysis from mineral assemblages
Phenocrysts consist mostly of plagioclase and rarely, clinopyroxene.
Regional hydrothermal alteration and [sup.18]O-depletion of the ca. 620 Ma Huntington Mountain pluton and related rocks, Cape Breton Island, Canada
2) Ijolite refers to a series of plutonic rocks containing nepheline and 30-60% mafic minerals, generally clinopyroxene, and including titanite, apatite and sometimes andradite (Jackson, 1997).
Podlesnoite Ba[Ca.sub.2](C[O.sub.3])[.sub.2][F.sub.2]: a new mineral species from the Kirovskii mine Khibiny, Kola Peninsula, Russia

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