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[R8-07] UHT metamorphic rocks from northern Mogok, Myanmar
Keywords:Mogok metamorphic belt, UHT metamorphism, Spl-Qz symplectite, Opx-Spl-Crd corona, Oligocene
Two types of UHT-metamorphic rocks have been newly found from Mogok metamorphic belt in Myanmar. Those are Spl-Qz symplectite bearing Grt-Sil-Qz-Kfs felsic gneiss and Grt-Opx-Crd-Sil granulite including Opx-Crd-Spl symplectite. Estimated metamorphic P-T conditions of these UHT-metamorphic rocks show 5.5 - 8 kbar and 850 - 1000 ℃, and LA-ICP-MS zircon U-Pb dating indicate various inherited ages ranging from 3100 to 60 Ma and concordant metamorphic age of 26.56±0.76 Ma.