Characteristics of Deep-Derived Enclave and Its Zircon LA-ICP-MS U-Pb Age of Machangqing Complex, Yunnan Province
详细信息
- 责任者：Guo Xiaodong (Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Ge Liangsheng
- 刊名：Acta Petrologica Sinica
- 出版年：2012
- 卷期：28(5)
- 关键词：深成岩体 ; plutons ; 铀—铅计时 ; U-Pb dating
- 页码：p.1413-1424
- 图表：illus.,1 table,59 refs.
- 分类号：0801
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Machangqing complex is an important part of alkali-rich porphyry belt in western Yunnan Province. According to the geological features of the enclaves, the author analyzed the zircons from enclaves with the LA-ICP-MS and obtained a U-Pb weighted average age of (35.13±0.23) Ma (MSWD=0.64). Studies show the Machangqing alkali-rich porphyry is the mixture of crust-derived and mantle-derived magma enclaves and their host rocks have the similar magma evolution process and the injection of mantle-derived magma is a key factor to the ore-formation of this series magma.
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