The formation age and tectonic significance of Yemuqi granite in West Junggar, Xinjiang

WEN Zhigang; WANG Hongqiang; DU Yao; LIU Songbai; WANG Jiawei

2019 Vol. 38, No. 8

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WEN Zhigang, WANG Hongqiang, DU Yao, LIU Songbai, WANG Jiawei. The formation age and tectonic significance of Yemuqi granite in West Junggar, Xinjiang[J]. Geological Bulletin of China, 2019, 38(8): 1297-1305.

Citation:

WEN Zhigang, WANG Hongqiang, DU Yao, LIU Songbai, WANG Jiawei. The formation age and tectonic significance of Yemuqi granite in West Junggar, Xinjiang[J]. Geological Bulletin of China, 2019, 38(8): 1297-1305.

The formation age and tectonic significance of Yemuqi granite in West Junggar, Xinjiang

1.
Shaanxi Geology and Mineral Research Institute Co., Ltd., Xianyang 712000, Shaanxi, China
2.
Xi'an University of Science and Technology, Xi'an 710054, Shaanxi, China
3.
Shaanxi Geological and Mineral Third Party Co., Ltd., Baoji 721300, Shaanxi, China

Received Date: 13 January 2018

Revised Date: 04 April 2018

Publish Date: 15 August 2019

Abstract

Abstract

In this paper, the petrology, lithogeochemistry, and isotope chronology of Yemuqi granite closely associated with Early Paleozoic granite in the southern part of West Junggar, Xinjiang, were studied in detail. It is considered that the granite belongs to low potassium (tholeiitic) series. The rock geochemistry shows the characteristics of the intraplate close to island arc region. The authors obtained accurate age data of 539.7±2.6Ma by LA-ICP-MS zircon U-Pb dating of the monzonite granite. It is shown that the age of its formation was Early Cambrian. The intrusive rock is the oldest product of magmatic activity in the West Junggar area, which represents the geological record of the early stage of the splitting in the Early Paleoceanic Basin after the formation of the united continent of Nodingnia.
- West Junggar /
- granite /
- LA-CP-MS zircon U-Pb age /
- tectonic significance

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References

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