Variation and evolution of vietnamese metamorphic rocks

研究成果: ジャーナルへの寄稿記事

抄録

Trans Vietnam Orogenic Belt distributed in north to central Vietnam includes various types of metamorphic rocks. Most metamorphic rocks show the Permian-Triassic ages and are characterized by decompressional evolution with various metamorphic thermal gradients (8- 25 °C/km). In contrast, some metamorphic rocks having the Ordovician-Silurian age show isobaric heating prograde stage at low-pressure condition (25-30 °C/km). Granitic rocks also show the Permian-Triassic or Ordovician-Silurian ages. The older granitoids have volcanic arc chemical signature, some of which were metamorphosed at the Permian-Triassic. These results suggest that island arc tectonic setting at the Ordovician-Silurian, where arc magmatism heated the arc crust and caused the low-pressure (with isobaric heating) metamorphism at this period. The Permian-Triassic metamorphic rocks and granitoids were formed by subsequent continental collision and subduction of the Indochina craton together with the past Ordovician-Silurian island arc beneath the South China craton.

元の言語英語
ページ(範囲)26-32
ページ数7
ジャーナルJapanese Magazine of Mineralogical and Petrological Sciences
45
発行部数1
DOI
出版物ステータス出版済み - 1 1 2016

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Metamorphic rocks
Silurian
metamorphic rock
Ordovician
Permian
Triassic
island arc
low pressure
craton
heating
Heating
continental collision
Tectonics
orogenic belt
tectonic setting
Thermal gradients
magmatism
metamorphism
subduction
Rocks

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology
  • Economic Geology

これを引用

Variation and evolution of vietnamese metamorphic rocks. / Nakano, Nobuhiko.

:: Japanese Magazine of Mineralogical and Petrological Sciences, 巻 45, 番号 1, 01.01.2016, p. 26-32.

研究成果: ジャーナルへの寄稿記事

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