Dasgupta, Somnath ; Sengupta, Pulak ; Mondal, A. ; Fukuoka, M. (1993) Mineral chemistry and reaction textures in metabasites from the Eastern Ghats belt, India and their implications Mineralogical Magazine, 57 (1). pp. 113-120. ISSN 0026-461X
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Official URL: http://www.minersoc.org/pages/e_journals/minmag.ht...
Abstract
Three types of mafic granulites, namely two pyroxene-plagioclase granulite (MG), two pyroxene-plagioclase-garnet granulite (GMG) and spinel-olivine-plagioclase-two pyroxene granulite (SMG) are exposed at Sunkarimetta, Eastern Ghats belt, India. The mafic granulites exhibit a foliation concordant with that in associated granulite facies quartzofeldspathic gneisses. Textural characteristics and mineral chemical data suggest the following mineral reactions: olivine + plagioclase = spinel + orthopyroxene + clinopyroxene (SMG), orthopyroxene + plagioclase = garnet + quartz (GMG), clinopyroxene + plagioclase = garnet + quartz (GMG) and plagioclase + hemoilmenite + quartz = garnet + ilmenite + O2 (GMG). Geothermobarometry indicates maximum P-T conditions of metamorphism at c. 8.5 kbar, 950°C.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The Mineralogical Society. |
| ID Code: | 64653 |
| Deposited On: | 12 Oct 2011 11:35 |
| Last Modified: | 12 Oct 2011 11:35 |
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