Garnet-biotite pair: a suitable geothermometer
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چکیده
منابع مشابه
Distribution of Fe and Mg between garnet and biotite in Scottish Barrovian metamorphic zones
The distribution coefficient KD=(Mg / Fe)garnet/(Mg/Fe)biotite has been calculated for eight garnet-biotite pairs from rocks ranging from the garnet isograd to the staurolite zone along the Stonehaven coast of NE Scotland. This distribution coefficient depends upon metamorphic temperature and is not dependent upon the Mn and Ca content of garnet. Garnet-biotite geothermometer yields temperature...
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Mashhad Metamorphic Complex (MMC) with metamorphic, granitic intrusions and ophiolite units is situated in the suture zone of Paleotethys in NE Iran. Triassic staurolite-garnet schist of Khalaj represents the highest grade of metamorphism in MMC. In this study EPMA analyses of garnet and biotite used to determine the maximum temperature for regional metamorphism. The pattern of zoning in garnet...
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Temperature estimates obtained with various biotite-garnet thermometers are inconsistent in granulite facies rocks. Although the inconsistency lies partly in the lack of definition of equilibrium criteria, it still remains after rigorous selection of analyzed mineral pairs (isolated biotite and garnet cores for peak equilibrium conditions) and originate from minor element effects in garnet and ...
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A particular feature of biotite grains from some of the Canadian Appalachian granitic rocks is the presence of lenses of Ca-Al silicates developed along cleavage planes. These from the more to less common are prehnite, pumpellyite and grandite garnet, an intermediate composition between andradite and grossular. Rarely all three minerals can be observed together in one single biotite grain. Micr...
متن کاملA Liquidus Geothermometer for Snc, Lunar, and Eucritic Magmas
Figure 1 summarizes of 82 such experiments for SNC compositions using a T vs. MgO diagram, where T is the temperature of the experiment and MgO is the magnesia content of the glass quenched from that temperature [1-8]. All of these experiments were performed at one bar pressure and most were performed near the FMQ oxygen buffer. The data define a smooth trend and have been fitted with a third o...
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ژورنال
عنوان ژورنال: Journal of Nepal Geological Society
سال: 2017
ISSN: 0259-1316
DOI: 10.3126/jngs.v53i0.23806