雅鲁藏布江墨脱段隆升速率：来自黑云母Ar/Ar年代学证据

涂继耀; 季建清; 钟大赉; 周晶

doi:10.3799/dqkx.2021.106

Volume 46 Issue 12

Dec. 2021

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Article Navigation > Earth Science > 2021 > 46(12): 4533-4545

Tu Jiyao, Ji Jianqing, Zhong Dalai, Zhou Jing, 2021. Rock Exhumation Rates in Motuo Section of Yarlung Tsangpo River: Evidence from Biotite Ar/Ar Chronology. Earth Science, 46(12): 4533-4545. doi: 10.3799/dqkx.2021.106

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Tu Jiyao, Ji Jianqing, Zhong Dalai, Zhou Jing, 2021. Rock Exhumation Rates in Motuo Section of Yarlung Tsangpo River: Evidence from Biotite Ar/Ar Chronology. Earth Science, 46(12): 4533-4545. doi: 10.3799/dqkx.2021.106

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Rock Exhumation Rates in Motuo Section of Yarlung Tsangpo River: Evidence from Biotite Ar/Ar Chronology

doi: 10.3799/dqkx.2021.106

Tu Jiyao^{1, 2
,
,},
Ji Jianqing¹,
Zhong Dalai³,
Zhou Jing¹

1.
Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing 100871, China
2.
Institute of Geophysics, China Earthquake Administration, Beijing 100081, China
3.
State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

Received Date: 2021-05-10
Publish Date: 2021-12-15

Abstract

Abstract

To reveal the tectonic evolution of the eastern Himalayan syntaxis and its surrounding areas, in this paper it reports 10 ⁴⁰Ar/³⁹Ar ages of biotite from Motuo Section of the Yarlung Tsangpo River. It quantitatively interprets the rock's uplift and exhumation rates represented by these ages, using a modeling code "Pecube". Biotite ⁴⁰Ar/³⁹Ar ages in this paper are in the range of 11.25-24.04 Ma. Corresponding exhumation rates are in the range of 0.25-0.51 km/Ma. The rock exhumation rates in Motuo Section of the Yarlung Tsangpo River have obvious differences between northern and southern, which is characterized by the northern exhumation rates about 0.2 km/Ma higher than the southern. The ages and simulation results show that relative to the inside of the eastern Himalayan syntaxis, the exhumation rates in Motuo Section of the Yarlung Tsangpo River are lower. And the NW/NWW-trending thrust fault zones which were resulted by the collision between Himalayan terrane and Lhasa terrane, not only located in the inside of the eastern Himalayan syntaxis, but also probably located in Motuo Section of the Yarlung Tsangpo River.
- eastern Himalayan syntaxis,
- Yarlung Tsangpo River,
- biotite ⁴⁰Ar/³⁹Ar,
- exhumation,
- thrust fault,
- geochronology

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References(44)

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Rock Exhumation Rates in Motuo Section of Yarlung Tsangpo River: Evidence from Biotite Ar/Ar Chronology

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