2019 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)
Sep 19 - Sep 23, 2019Kyushu University Ito Campus
2019 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)
Sep 19 - Sep 23, 2019Kyushu University Ito Campus
[R8P-11]Pressure–temperature condition of pelitic gneisses from the Mutis Metamorphic Complex, Timor Island, Indonesia
*Fransiska Ayuni Catur Wahyuandari1, Yasuhito Osanai1, Nobuhiko Nakano1, Tatsuro Adachi1, Nugroho Imam Setiawan2(1. Kyushu University, 2. Universitas Gadjah Mada)
Keywords:
Geothermobarometry,P-T condition,Mutis Metamorphic Complex,Timor
Garnet-bearing pelitic gneisses mostly exhibit prograde zoning pattern meanwhile 1 rock sample of pelitic gneiss containing sillimanite exhibits homogenous wide core with a retrograde thin rim. Partial replacement of garnet grain by biotite, chlorite, and other secondary minerals suggest that metamorphic rocks in Mutis metamorphic complex are affected by retrograde metamorphism during cooling.