First Report of Sapphirine-bearing Rocks from the Palghat-Cauvery Shear Zone System, Southern India |
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| Authors: | M. Santosh Toshiaki Tsunogae Saori Koshimoto |
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| Affiliation: | aFaculty of Science, Kochi University, Akebono-cho 2-5-1, Kochi 780-8520, Japan;bInstitute of Geoscience, University of Tsukuba, Ibaraki 305-8571, Japan |
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| Abstract: | Silica deficient Mg-Al granulites from Paramati within the Palghat-Cauvery Shear System contain sapphirine in association with corundum, spinel and sillimanite. Gedrite, which occurs commonly in this locality, coexists with cordierite, corundum and sillimanite. Mineral assemblages and reaction textures indicate peak metamorphism at ultrahigh- temperature conditions. This new locality provides evidence for extreme crustal metamorphism along the Archean-Proterozoic collision boundary in southern India. |
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| Keywords: | Sapphirine-corundum-spinel mineral chemistry ultrahigh-temperature metamorphism |
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