LA-ICP-MS zircon U-Pb age of gneiss from Gaoligong Mountain Group on the southeastern margin of Tengchong block in western Yunnan Province

LIN Shi-liang, CONG Feng, GAO Yong-juan, ZOU Guang-fu

2012 Vol. 31, No. 0203

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LIN Shi-liang, CONG Feng, GAO Yong-juan, ZOU Guang-fu. LA-ICP-MS zircon U-Pb age of gneiss from Gaoligong Mountain Group on the southeastern margin of Tengchong block in western Yunnan Province[J]. Geological Bulletin of China, 2012, 31(0203): 258-263.

Citation:

LIN Shi-liang, CONG Feng, GAO Yong-juan, ZOU Guang-fu. LA-ICP-MS zircon U-Pb age of gneiss from Gaoligong Mountain Group on the southeastern margin of Tengchong block in western Yunnan Province[J]. Geological Bulletin of China, 2012, 31(0203): 258-263.

LA-ICP-MS zircon U-Pb age of gneiss from Gaoligong Mountain Group on the southeastern margin of Tengchong block in western Yunnan Province

LIN Shi-liang, CONG Feng, GAO Yong-juan, ZOU Guang-fu

Chengdu Institute of Geology and Mineral Resources, China Geological Survey, Chengdu 610082, Sichuan, China

Publish Date: 15 March 2012

Abstract

Abstract

Gaoligong gneiss from southeastern Tengchong block has experienced multi-stage metamorphism, and hence shows evident anatexis and mylonitization. 14 of the 15 zircon points yielded 206Pb/238U age of 454.4-546.7Ma, with the average age of 489Ma±16Ma. The result suggests that the Gaoligong Mountain Group in southeastern Tengchong block underwent intense regional metamorphism including migmatization in Early Paleozoic, which reflected the Pan-African event in the Tengchong block.
- western Yunnan /
- Tengchong block /
- gneisses /
- anatexis /
- LA-ICP-MS zircon U-Pb age