Timing of high-grade metamorphism in the Kontum Massif, Vietnam: Constraints from zircon–monazite multi-geochronology and trace elements geochemistry of zircon–monazite–garnet

Vuong Thi Sinh Bui, Yasuhito Osanai, Nobuhiko Nakano, Tatsuro Adachi, Ippei Kitano, Masaaki Owada

Research output: Contribution to journalArticle

Abstract

Metamorphic rocks in the Kontum Massif, including the Kannak, Ngoc Linh and Kham Duc Complexes are characterized by amphibolite- to granulite-facies metamorphism and their mono- versus poly-metamorphic evolution is a matter of debate. In this study, we constrained on the timing of high-grade metamorphism in this massif by combining laser ablation inductively coupled plasma mass spectrometry U–Pb zircon and electron microprobe chemical U–Th–Pb monazite ages with geochemical relation of trace elements between zircon–monazite–garnet. The results indicated that the analyzed pelitic and mafic granulites in the western Kannak Complex experienced the high temperature metamorphism at ca. 250 Ma with subsequent decompression. However, in the western Ngoc Linh Complex two high-grade metamorphic events were recorded in one of analyzed pelitic gneisses. The first high temperature metamorphism began at ca. 440–450 Ma with the attainment of the peak condition at ca. 430 Ma, overprinted by the second one at ca. 240–250 Ma with following decompression and exhumation stage at ca. 230 Ma. The other pelitic gneiss and mafic granulite detected only younger single event. Pelitic gneisses in the Kham Duc Complex recorded medium pressure metamorphism occurred at ca. 240 Ma without any traces of early metamorphic event.

Original languageEnglish
Article number104084
JournalJournal of Asian Earth Sciences
Volume187
DOIs
Publication statusPublished - Jan 2020

Fingerprint

monazite
geochronology
garnet
zircon
metamorphism
geochemistry
trace element
decompression
granulite
granulite facies
amphibolite
ablation
exhumation
electron probe analysis
gneiss
metamorphic rock
mass spectrometry
laser
plasma

All Science Journal Classification (ASJC) codes

  • Geology
  • Earth-Surface Processes

Cite this

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title = "Timing of high-grade metamorphism in the Kontum Massif, Vietnam: Constraints from zircon–monazite multi-geochronology and trace elements geochemistry of zircon–monazite–garnet",
abstract = "Metamorphic rocks in the Kontum Massif, including the Kannak, Ngoc Linh and Kham Duc Complexes are characterized by amphibolite- to granulite-facies metamorphism and their mono- versus poly-metamorphic evolution is a matter of debate. In this study, we constrained on the timing of high-grade metamorphism in this massif by combining laser ablation inductively coupled plasma mass spectrometry U–Pb zircon and electron microprobe chemical U–Th–Pb monazite ages with geochemical relation of trace elements between zircon–monazite–garnet. The results indicated that the analyzed pelitic and mafic granulites in the western Kannak Complex experienced the high temperature metamorphism at ca. 250 Ma with subsequent decompression. However, in the western Ngoc Linh Complex two high-grade metamorphic events were recorded in one of analyzed pelitic gneisses. The first high temperature metamorphism began at ca. 440–450 Ma with the attainment of the peak condition at ca. 430 Ma, overprinted by the second one at ca. 240–250 Ma with following decompression and exhumation stage at ca. 230 Ma. The other pelitic gneiss and mafic granulite detected only younger single event. Pelitic gneisses in the Kham Duc Complex recorded medium pressure metamorphism occurred at ca. 240 Ma without any traces of early metamorphic event.",
author = "Bui, {Vuong Thi Sinh} and Yasuhito Osanai and Nobuhiko Nakano and Tatsuro Adachi and Ippei Kitano and Masaaki Owada",
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T1 - Timing of high-grade metamorphism in the Kontum Massif, Vietnam

T2 - Constraints from zircon–monazite multi-geochronology and trace elements geochemistry of zircon–monazite–garnet

AU - Bui, Vuong Thi Sinh

AU - Osanai, Yasuhito

AU - Nakano, Nobuhiko

AU - Adachi, Tatsuro

AU - Kitano, Ippei

AU - Owada, Masaaki

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