Geochemistry and Implication of the Gangdese Batholiths from Renbu and
详细信息
- 责任者：Huang Yu (State Key Laboratory of Geological Processes and Mineral Resources ; School of Earth Science and Mineral Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Zhao Zhidan
- 刊名：Acta Petrologica Sinica
- 出版年：2010
- 卷期：26(10)
- 关键词：花岗岩 ; granite ; 岩石地球化学 ; lithogeochemistry ; 冈底斯山 ; Gangdise Range
- 页码：p.3131-3142
- 图表：4 illus., 3 tables, 60 refs.
- 分类号：0801
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
This paper presents the systematic study of elements,Sr-Nd-Pb isotopic and zircon SHRIMP U-Pb dating and Hf isotope results of the Gangdese batholiths in Renbu and Lhasa areas. The batholiths, with the U-Pb age ranges from 82 Ma to 45 Ma dated in this work, are granitoids that containing gabbroic and dioritic enclaves. The study further implies that mafic underplating and magma mixing has played an important role in generating the Gangdese batholiths. The large-scale underplating event was not only responsible for the magma mixing processes, but also for the crustal vertical thickening and growth in southern Gangdese in the Tibetan plateau.
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