Geochemistry, isotopic chronology and tectonic significance of diorite in the South of Bailang County, Tibet

SHI Weigang; ZHANG Wenfeng; CHENG Jun; ZHAI Jie

2016 Vol. 35, No. 9

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SHI Weigang, ZHANG Wenfeng, CHENG Jun, ZHAI Jie. Geochemistry, isotopic chronology and tectonic significance of diorite in the South of Bailang County, Tibet[J]. Geological Bulletin of China, 2016, 35(9): 1463-1471.

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SHI Weigang, ZHANG Wenfeng, CHENG Jun, ZHAI Jie. Geochemistry, isotopic chronology and tectonic significance of diorite in the South of Bailang County, Tibet[J]. Geological Bulletin of China, 2016, 35(9): 1463-1471.

Geochemistry, isotopic chronology and tectonic significance of diorite in the South of Bailang County, Tibet

Academy of Regional Geological Survey and Mineral Resources Exploration of Shaanxi, Xianyang 712000, Shaanxi, China

Received Date: 21 April 2016

Revised Date: 27 June 2016

Publish Date: 15 September 2016

Abstract

Abstract

In this paper, petrology, geochemical characteristics and U-Pb isotope chronology were comprehensively investigated to analyze the geological features of the intermediate intrusive rocks discovered in the south of Bailang County, Tibet. The results show that these rocks belong to calc-alkaline rock series, with LREE enrichment and HREE depletion; they have geochemical characteristics of intraplate basalts, being mafic intrusive body formed at the Himalayan passive continental margin stretching-compression stage in the late Triassic period. The results obtained by the authors provide new magmatic evidence for Early Tethys passive margin sedimentary basin evolution of the Yarlung Zangbo River.
- Tibet /
- the south of Bailang County /
- Galari diorite /
- geochemistry /
- LA-ICP-MS zircon U-Pb dating

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References

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