Paleogene granite magmatism in the north of the Truong Son belt and implication for crustal evolution

Authors

  • Trinh Dinh Huan General Department of Geology and Mineral of Vietnam, Hanoi, Vietnam
  • Luu Cong Tri General Department of Geology and Mineral of Vietnam, Hanoi, Vietnam
  • Nguyen Tuan Anh Vietnam Institute of Geological Sciences, Hanoi, Vietnam
  • Tran Viet Anh Vietnam Institute of Geological Sciences, VAST, Hanoi, Vietnam
  • Phan Hoang Giang General Department of Geology and Mineral of Vietnam, Hanoi, Vietnam
  • Nagi Takahashi University of the Ryukyus, Okinawa, Japan
  • Boua Lay Saadsy Department of Geology and Mineral of Laos, Vientiane, Laos

DOI:

https://doi.org/10.15625/2615-9783/16444

Keywords:

Truong Son belt, Cenozoic granites, Zircon U-Pb dating, Sr-Nd-Pb isotope

Abstract

Abundant granitoids aged 24.59 Ma to 28.62 Ma were exposed along Phu Hoat high metamorphic zone, northern of the Truong Son belt, termed Na Khoun complex in Northern Laos (NL) and Ban Chieng complex in Western Vietnam (WV). Ten granitic samples were collected from these complexes show geochemical characteristics of high SiO2 and K2O contents, medium peraluminous that belong to S-type granites. Initial 87Sr/86Sr isotopic ratios and εNd(t) are broad values of 0.708507 to 0.74539 and -5.22 to -12.66, respectively, together with high 206Pb/204Pb (18.864-19.392), 207Pb/204Pb (15.736-15.841) and 208Pb/204Pb (39.224-40.080) which indicated crustal origin, we suggest that the NL-WV intrusion was associated with transpression form by the India-Asia collision events during Cenozoic.

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Published

2021-08-19

How to Cite

Trinh Dinh, H., Luu Cong, T., Nguyen Tuan, A., Tran Viet, A., Phan Hoang, G., Takahashi, & Saadsy. (2021). Paleogene granite magmatism in the north of the Truong Son belt and implication for crustal evolution. Vietnam Journal of Earth Sciences, 43(4). https://doi.org/10.15625/2615-9783/16444

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