Devonian Magmatism from the Southern Lhasa Terrane, Tibetan Plateau

• 责任者：Dong Xin (Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Zhang Zeming
• 刊名：Acta Petrologica Sinica
• 出版年：2010
• 卷期：26(7)
• 关键词：花岗岩 ; granite ; 西藏 ; Tibet
• 页码：p.2226-2232
• 图表：5 illus., 2 tables, 64 refs.
• 分类号：0801
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

This paper firstly reports a Middle Paleozoic magmatic event generated in South Lhasa terrane. The studied granite occurs nearby Jiacha County, consists mainly of plagioclase, quartz, K-feldspar and a minor biotite, and shows gneissic or augen structure, indicating variable degrees of ductile deformation. Zircons from granite are typical of magmatic crystallization, and yield a U-Pb concordant age of (366.7±2.5) Ma. The result provides an important constraint on the origin, tectonic affinity and early tectonic evolution of the Lhasa terrane.