EPMA U-Th-Pb monazite dating of metamorphic rocks from the Mogok Metamorphic Belt, central Myanmar
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概要
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The Mogok Metamorphic Belt (MMB), situated in central Myanmar, contains an assemblage of high-grade metamorphic rocks believed to have been formed during a regional Early Eocene-Oligocene metamorphic event. We newly found Grt-Opx granulite in the Mogok area, which was formed under pressure-temperature (P-T ) conditions estimated as being 6.5-8.7 kbar and 800-950 °C. Based on the results of EPMA U-Th-Pb Mnz dating, the central MMB, which runs through the Mogok, Mandalay, and Meikthila areas, is characterized by an Eocene to Oligocene deformation and fluid infiltration event. In addition, several Mnz grains from the Meikthila and Mandalay areas record ages of the Late Triassic (∼ 200 Ma) and Cretaceous (∼ 80 Ma and 110 Ma) geologic events.
- 日本鉱物科学会の論文
著者
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Charusiri Punya
Department Of Geology Faculty Of Science Chulalongkorn University
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Adachi Tatsuro
Division Of Earth Sciences Faculty Of Social And Cultural Studies Kyushu University
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Osanai Yasuhito
Division Of Earth Sciences Faculty Of Social And Cultural Studies Kyushu University
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Nakano Nobuhiko
Division Of Earth Sciences Faculty Of Social And Cultural Studies Kyushu University
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YONEMURA Kazuhiro
Division of Earth Sciences, Faculty of Social and Cultural Studies, Kyushu University
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ZAW Tun
Geology Department, Yangon University
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