SHRIMP U-Pb Dating of Zircons from Diorite Batholith Hosting Daping Gold Deposit in Ailaoshan Gold Belt, Yunan Province , China
详细信息
- 责任者：Zhang Yan (Department of Earth Science ; Sun Yat-Sen University ; Guangzhou 510275 ; China) ; Sun Xiaoming
- 刊名：Acta Petrologica Sinica
- 出版年：2011
- 卷期：27(9)
- 关键词：金矿 ; gold ores ; 闪长岩 ; diorites ; 铀—铅计时 ; U-Pb dating ; 云南 ; Yunnan Province
- 页码：p.2600-2608
- 图表：4 illus., 2 tables, 29 refs.
- 分类号：1001
- 出版序号：561
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Being one of the largest gold deposits in Ailaoshan gold belt, the Daping gold deposit is hosted in a ductile deformed and alterated diorite batholith, and is believed to be a typical Cenozoic orogenic type gold deposit. In this study, SHRIMP U-Pb dating of zircon from the diorite batholith was performed, and the result is (773±12) Ma, suggesting that the diorite was a Late Proterozoic batholith, but not a commonly recognized Caledonian rock body. The diorite batholith is a product of large-scale basic to acidic magmatism during the Jinning-Chengjiang epoch, and is corresponding to a period of Gondwana accretion after Rodinian dispersion.