Open AccessJournal Article
Convolute zoning of plagioclase phenocrysts in miocene volcanics from the Western Santa Monica Mountains. California
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This article is published in American Mineralogist.The article was published on 1968-06-01 and is currently open access. It has received 10 citations till now. The article focuses on the topics: Phenocryst & Plagioclase.read more
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The magma mixing origin of mantled feldspars
TL;DR: The key to mantled feldspar genesis is epitaxial nucleation of plagioclase on K-feldspar or on plagiocase as mentioned in this paper, which occurs in both volcanic and plutonic environments.
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Observations of plagioclase zoning using interference imaging
T. H. Pearce,A. M. Kolisnik +1 more
TL;DR: In this article, the authors used interference imaging techniques (laser interference microscopy in transmitted light and Nomarski differential interference contrast in reflected light) to study different types of zoning in magmatic plagioclase crystals.
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Tungsten-bearing rutile from the Kori Kollo gold mine, Bolivia
TL;DR: W-bearing rutile formed during alteration of jarosite by resurgent hydrothermal fluids in the oxide zone of the Kori Kollo gold deposit is considered to be changes in externally controlled variables occurring in a shallow hydro-thermal system as mentioned in this paper.
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Quartz crystals in Toba rhyolites show textures symptomatic of rapid crystallization
TL;DR: In this paper, a combination of qualitative and quantitative analyses (petrography, CL, EBSD, X-ray CT, LA-ICP-MS) is used to identify the underlying structure and texture interdependencies in igneous quartz.
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Dikes of the McClure mountain — Iron mountain alkalic complex, Fremont county, Colorado, U.S.A.
E. Wm. Heinrich,D. H. Dahlem +1 more
TL;DR: The McClure Mountain-Iron Mountain alkalic complex as mentioned in this paper is an irregularly ovoid body about 8×6.5 kilometers in plan, which contains major petrologic units (in age sequence): 1) peridotite and ilmenite-magnetite lenses, 2) gabbro, 3) hornblende syenite, 4) ijolite and 5) nepheline syenitic, whose internal arrangement is irregular.