U-Pb dating for detrital zircons from the Bima Formation, Tinggong, Tibet

ZHOU Peng; RONG Feng; DUO Ji-wei-se; LI Qiang; TANG Hua; FAN Yuan

doi:10.19826/j.cnki.1009-3850.(2020)02-0141-10

Sedimentary Geology and Tethyan Geology > 2020 > 40(2): 141-150. > DOI: 10.19826/j.cnki.1009-3850.(2020)02-0141-10

ZHOU Peng, RONG Feng, DUO Ji-wei-se, LI Qiang, TANG Hua, FAN Yuan. U-Pb dating for detrital zircons from the Bima Formation, Tinggong, Tibet[J]. Sedimentary Geology and Tethyan Geology, 2020, 40(2): 141-150. DOI: 10.19826/j.cnki.1009-3850.(2020)02-0141-10

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U-Pb dating for detrital zircons from the Bima Formation, Tinggong, Tibet

1. Geothermal and Geological Party, Tibet Bureau of Mineral Resource Exploration and Development,, Lhasa 850000, China;
2. the Northwest Sichuan Geological Team, Bureau of Geology and Mineral Resources Exploration and Development of Sichuan Province, Mianyang 621000, Sichuan, China

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Received Date: March 13, 2020
Revised Date: May 20, 2020
Published Date: June 29, 2020

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Abstract

Abstract

The Sangri Group is widely distributed in the middle-east section of the Gangdise volcanic-magmatic arc, which is a representative record of the subduction of the New Tethys Ocean. The U-Pb dating for the detrital zircons from the Bima Formation of the Sangri Group in Tinggong area shows four ages, which are 85.7-143.5Ma,160.2-191.2Ma,334.4-364.1Ma and 904Ma respectively. Combining the youngest age (85.7±1.9Ma) with fossils obtained from the Bima Formation, the authors believe that the Bima Formation was formed between the early Cretaceous and the late Cretaceous, and its sedimentary materials were from the eroded volcanic-magmatic areas of the Lhasa block.
- middle-east section of the Gangdise,
- the Bima Formation,
- U-Pb dating for detrital zircons,
- geochemistry

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U-Pb dating for detrital zircons from the Bima Formation, Tinggong, Tibet

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