Early Miocene Leucogranites in Dinggye Area , Southern Tibet
详细信息
- 责任者：Yu Junjie (Key Laboratory of Continental Collision and Plateau Uplift ; Institute of Tibetan Plateau Research ; Chinese Academy of Sciences ; Beijing 100085 ; China) ; Zeng Lingsen
- 刊名：Acta Petrologica Sinica
- 出版年：2011
- 卷期：27(7)
- 关键词：淡色花岗岩 ; leucogranite ; 地球动力学 ; geodynamics ; 西藏 ; Tibet
- 页码：p.1961-1972
- 图表：6 illus., 2 tables, 76 refs.
- 分类号：0801
- 出版序号：236
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
The Ama Drime Massif, Dinggye area, is located in the central Greater Himalaya and consists of granitic gneisses, metapelites, metabasites and massive leucogranites, and has experienced amphibolite- to granulite-facies metamorphism. Whole-rock major- and trace-element, radiogenic isotope (Sr and Nd), and SHRIMP zircon analyses were undertaken to investigate the petrogenic relationship between the leucogranites and the metamorphic rocks, as well as the formation mechanism of the leucogranites. In conclusion, both granitic and pelitic gneisses have experienced high-grade metamorphism and anatexis. The Miocene anatectic event could be episodic and at least produced leucogranitic melts at 22~21Ma and ~16 Ma, respectively.
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