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 journalLetter

10 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 languageEnglish
Pages (from-to)184-188
Number of pages5
JournalJournal of Mineralogical and Petrological Sciences
Volume108
Issue number3
DOIs
Publication statusPublished - Sep 3 2013

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metamorphic rocks
monazite
dating
metamorphic rock
Oligocene
Eocene
granulite
infiltration
Triassic
Cretaceous
fluid
grade
fluids
temperature

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geology

Cite this

EPMA u-th-pb monazite dating of metamorphic rocks from the mogok metamorphic belt, central myanmar. / Yonemura, Kazuhiro; Osanai, Yasuhito; Nakano, Nobuhiko; Adachi, Tatsuro; Charusiri, Punya; Zaw, Tun Naing.

In: Journal of Mineralogical and Petrological Sciences, Vol. 108, No. 3, 03.09.2013, p. 184-188.

Research output: Contribution to journalLetter

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AU - Adachi, Tatsuro

AU - Charusiri, Punya

AU - Zaw, Tun Naing

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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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