Study on U-Pb age and provenance of detrital zircons from sandstones of the Shaximiao Formation, northwestern Sichuan Basin

CHEN Weiwei; MOU Chuanlong; WANG Qiyu; YAO Shengyang; REN Peng

doi:10.19826/j.cnki.1009-3850.2024.01001

2024 Vol. 44, No. 3

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CHEN Weiwei, MOU Chuanlong, WANG Qiyu, YAO Shengyang, REN Peng. 2024. Study on U-Pb age and provenance of detrital zircons from sandstones of the Shaximiao Formation, northwestern Sichuan Basin. Sedimentary Geology and Tethyan Geology, 44(3): 613-629. doi: 10.19826/j.cnki.1009-3850.2024.01001

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CHEN Weiwei, MOU Chuanlong, WANG Qiyu, YAO Shengyang, REN Peng. 2024. Study on U-Pb age and provenance of detrital zircons from sandstones of the Shaximiao Formation, northwestern Sichuan Basin. Sedimentary Geology and Tethyan Geology, 44(3): 613-629. doi: 10.19826/j.cnki.1009-3850.2024.01001

Study on U-Pb age and provenance of detrital zircons from sandstones of the Shaximiao Formation, northwestern Sichuan Basin

1.
Shandong University of Science and Technology, Qingdao 266590, China
2.
Chengdu Center, China Geological Survey (Geosciences Innovation Center of Southwest China), Chengdu 610218, China
3.
Key Laboratory of Sedimentary Basins and Petroleum Resources, Ministry of Natural Resources, Chengdu 610218, China
4.
Chengdu University of Technology, Chengdu 610059, China
5.
China University of Geosciences, Wuhan 430074, China

More Information

Corresponding author: MOU Chuanlong, muchuanlongmu@sina.com

Received Date: 16 June 2023

Revised Date: 06 August 2023

Accepted Date: 01 August 2023

Publish Date: 30 September 2024

Abstract

Abstract

The U-Pb dating of detrital zircons from three sandstone samples of the Shaximiao Formation reveals five age groups: 2660～2300 Ma, 1905～1738 Ma, 1690～1442 Ma, 866～811 Ma, and 298～160 Ma. By comparing the ages of zircons from different blocks (or bodies) in the surrounding areas and combining relevant regional geological data, it is found that the detrital zircons with ages of 2660～2300 Ma and 1905～1738 Ma are mainly from the southern Qinling orogenic belt and the northern margin of the Yangtze Plate, and slightly from the Bikou terrane and the Songpan-Ganzi terrane. Detrital zircons with ages of 1690～1442 Ma come from the Wuguan Group, the Wudang Group, and the Bikou complex. Detrital zircons with ages of 866～811 Ma are mainly derived from the northern margin of the Yangtze Craton, the Bikou Group, and the South Qinling orogenic belt. Detrital zircons with ages of 298～160 Ma mainly come from the South Qinling orogenic belt and the Late Triassic Songpan-Ganzi terrane. Evidences show that the sediment provenance of the Shaximiao Formation is mainly derived from the South Qinling orogenic belt and the Songpan-Ganzi fold belt, and partly from the Yangtze Craton. The uplift of the South Qinling ended before the sedimentation of the Shaximiao Formation, thus blocking the sediment input from the North Qinling and the south margin of the North China Plate.
- northwestern Sichuan Basin /
- detrital zircon /
- U-Pb dating /
- provenance analysis /
- Shaximiao Formation

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References

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