II.—Albitization of Basic Plagioclase Felspars
نویسندگان
چکیده
منابع مشابه
Petrology, tectonic setting and ore mineralization potential of basic rocks in north of Alvand complex, using amphibole and plagioclase composition
The Alvand complex (Hamedan province) comprises several bodies ranging from acidic to intermediate and basic compositions intruded in the regional metamorphic sequence of the area (the Hamedan phyllites) during various magmatic episodes in Jurassic. In northern part of the complex (the Cheshmeh-ghasaban area) there are some outcrops of hornblende gabbro and olivine gabbronorite. The olivine-gab...
متن کاملRevisiting Plagioclase Optical Properties for Lunar Exploration
1 , C. M. Pieters 1 , M. D. Dyar 2 , K.A. Milam 3 , 1 Dept. of Geological Sciences, Brown University, Providence RI 02912, [email protected], [email protected], 2 Department of Astronomy, Mount Holyoke College, 50 College St., South Hadley, MA 01075, [email protected], 3 Department of Geological Sciences, Ohio University, 316 Clippinger Laboratories, Athens, OH 45701, [email protected].
متن کاملThe Accuracy of Derived Plagioclase Compositions from Multi-component, Multi-phase Sand Mixtures: Implications for Determining Martian Plagioclase Compositions
Introduction. Plagioclase feldspar has been identified as the dominant mineral phase in the martian crust [1-2] through analysis of Mars Global Surveyor Thermal Emission Spectrometer (TES) data. Martian meteorites , samples of isolated terrain on Mars, contain plagioclase in abundances secondary only to pyroxene. Terrestrial basalts and andesites contain primary plagioclase that is calcic-inter...
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Introduction: Minerals subjected to high shock pressures exhibit structural changes with increasing pressure (e.g., fractures, deformations, formation of diaplectic glass, and complete melting [1-6]). Petrologic and thermal infrared spectroscopic studies have shown that diaplectic glass (maskelynite) formation in feldspars occurs between ~25-45 GPa, while significant melting occurs above ~45 GP...
متن کاملAn Empirically Derived Kinetic Model for Albitization of Detrital Plagioclase
We propose an empirically derived model that estimates the extent of reaction for albitization of plagioclase as a function of time, grain surface area, and temperature from 0 to 200°C. We use a kinetic formulation independent of pressure, and consistent with the Rate Law, which quantifies the dependence of the reaction rate on the initial concentration of the reacting material, and the Arrheni...
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ژورنال
عنوان ژورنال: Geological Magazine
سال: 1909
ISSN: 0016-7568,1469-5081
DOI: 10.1017/s0016756800122551