Post-subdution evolution of the Northern Lhasa Terrane, Tibet: Constraints from geochemical anomalies, chronology and petrogeochemistry

Shi-mian Yu; Xu-dong Ma; Yan-chun Hu; Wei Chen; Qing-ping Liu; Yang Song; Ju-xing Tang

doi:10.31035/cg2021045

2022 Vol. 5, No. 1

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Article navigation > China Geology > 2022 > 5(1): 84-95

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Shi-mian Yu, Xu-dong Ma, Yan-chun Hu, Wei Chen, Qing-ping Liu, Yang Song, Ju-xing Tang, 2022. Post-subdution evolution of the Northern Lhasa Terrane, Tibet: Constraints from geochemical anomalies, chronology and petrogeochemistry, China Geology, 5, 84-95. doi: 10.31035/cg2021045

Citation:

Post-subdution evolution of the Northern Lhasa Terrane, Tibet: Constraints from geochemical anomalies, chronology and petrogeochemistry

a.
Geological Museum of Guizhou, Guiyang 550081, China
b.
MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
c.
No.1 Institute of Geology and Mineral Resources of Shandong Province, Jinan 250014, China

More Information

Corresponding authors: 2644775407@qq.com (Shi-mian Yu); maxudong2011@126.com (Xu-dong Ma)

Received Date: 11 May 2021

Revised Date: 03 July 2021

Accepted Date: 15 August 2021

Available Online: 26 August 2021

Publish Date: 15 January 2022

Abstract

Abstract

Bangong-Nujiang collisional zone (BNCZ) is an older one in Qinghai-Tibet Plateau and resulted in the famous Bangong-Nujiang metallogenic belt, which plays an important role in evaluating the formation and uplift mechanism of plateau. The northern and central Lhasa Terrane composed the southern part of the BNCZ. Since ore deposits can be used as markers of geodynamic evolution, the authors carried 1∶50000 stream sedimental geochemical exploration in the Xiongmei area in the Northern Lhasa Terrane to manifest the mineralization, and based on this mineralization with geochemical and chronological characteristics of related magmatic rocks to constrain their geodynamics and connection with the evolution of the Lhasa Terrane. The authors find Early Cretaceous magma mainly resulted in Cu, Mo mineralization, Late Cretaceous magma mainly resulted in Cu, Mo, and W mineralization in the studying area. The results suggest a southward subduction, slab rolling back and break-off, and thickened lithosphere delamination successively occurred within the Northern Lhasa Terrane.
- Bangong-Nujiang collisional zone /
- Geochemical anomalies /
- Mineralization /
- Slab rolling-back/break-off /
- Delamination /
- Northern Lhasa Terrane /
- Geological survey engineering /
- Tibet

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References

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