Reinvestigation and application of olivine-quartz-orthopyroxene barometry
نویسندگان
چکیده
منابع مشابه
Control of the Products of Serpentinization by the FeMg 1 Exchange Potential of Olivine and Orthopyroxene
It is argued that the high-Mg content (mg-number1⁄4 95 3) of the serpentine minerals in serpentinized peridotite is a consequence of the environmental FeMg 1 exchange potential imposed on the system by the abundance of olivine and orthopyroxene. Mass balance in the serpentinization reaction then requires the precipitation of an ironrich mineral that in most cases is magnetite.This causes hydrog...
متن کاملHigh pressure breakdown of antigorite to spinifex-textured olivine and orthopyroxene, SE Spain
The prograde, high pressure, transition from antigorite serpentinite to enstatite-olivine rock occurs along a tectonically undisturbed pro®le at Cerro del Almirez, SE Spain. The reactant assemblage is antigorite + olivine with tremolite rimming precursor diopside. The product assemblage of tremolite + chlorite + enstatite + olivine has a spinifex-like texture with arborescent or radiating olivi...
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چکیده ندارد.
15 صفحه اولRevisiting the electron microprobe method of spinel-olivine-orthopyroxene oxybarometry applied to spinel peridotites
Natural peridotite samples containing olivine, orthopyroxene, and spinel can be used to assess the oxygen fugacity ( fO2) of the upper mantle. The calculation requires accurate and precise quantification of spinel Fe3+/SFe ratios. Wood and Virgo (1989) presented a correction procedure for electron microprobe (EPMA) measurements of spinel Fe3+/SFe ratios that relies on a reported correlation bet...
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like any other learning activity, translation is a problem solving activity which involves executing parallel cognitive processes. the ability to think about these higher processes, plan, organize, monitor and evaluate the most influential executive cognitive processes is what flavell (1975) called “metacognition” which encompasses raising awareness of mental processes as well as using effectiv...
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ژورنال
عنوان ژورنال: Earth and Planetary Science Letters
سال: 1980
ISSN: 0012-821X
DOI: 10.1016/0012-821x(80)90098-9