EPMA u-th-pb monazite dating of metamorphic rocks from the mogok metamorphic belt, central myanmar

Kazuhiro Yonemura; Yasuhito Osanai; Nobuhiko Nakano; Tatsuro Adachi; Punya Charusiri; Tun Naing Zaw

doi:10.2465/jmps.121019a

EPMA u-th-pb monazite dating of metamorphic rocks from the mogok metamorphic belt, central myanmar

Kazuhiro Yonemura, Yasuhito Osanai, Nobuhiko Nakano, Tatsuro Adachi, Punya Charusiri, Tun Naing Zaw

Research output: Contribution to journal › Letter

12 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	184-188
Number of pages	5
Journal	Journal of Mineralogical and Petrological Sciences
Volume	108
Issue number	3
DOIs	https://doi.org/10.2465/jmps.121019a
Publication status	Published - Sep 3 2013

All Science Journal Classification (ASJC) codes

Geophysics
Geology

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title = "EPMA u-th-pb monazite dating of metamorphic rocks from the mogok metamorphic belt, central myanmar",

abstract = "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.",

author = "Kazuhiro Yonemura and Yasuhito Osanai and Nobuhiko Nakano and Tatsuro Adachi and Punya Charusiri and Zaw, {Tun Naing}",

year = "2013",

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doi = "10.2465/jmps.121019a",

language = "English",

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pages = "184--188",

journal = "Journal of Mineralogical and Petrological Sciences",

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publisher = "Tohoku University",

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}

TY - JOUR

T1 - EPMA u-th-pb monazite dating of metamorphic rocks from the mogok metamorphic belt, central myanmar

AU - Yonemura, Kazuhiro

AU - Osanai, Yasuhito

AU - Nakano, Nobuhiko

AU - Adachi, Tatsuro

AU - Charusiri, Punya

AU - Zaw, Tun Naing

PY - 2013/9/3

Y1 - 2013/9/3

N2 - 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.

AB - 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.

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DO - 10.2465/jmps.121019a

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SP - 184

EP - 188

JO - Journal of Mineralogical and Petrological Sciences

JF - Journal of Mineralogical and Petrological Sciences

SN - 1345-6296

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