Rb-Sr Isotopic Age of Sphalerite from the Paoma Lead-Zinc Deposit in Sichuan Province and Its Implications
- 责任者：Lin Zhiyong (Graduate School of Chinese Academy of Geological Sciences ; MRL Key Laboratory of Metallogeny and Mineral Assessment ; Beijing 100037 ; China) ; Wang Denghong
- 刊名：Geology in China
- 出版年：2010
- 卷期：37(2)
- 关键词：铅锌矿床 ; lead-zinc deposit ; 四川 ; Sichuan Province
- 页码：p.488-494
- 图表：4 illus., 2 tables, 16 refs.
- 分类号：1001
- issnNo：ISSN1000-3657
- isbnNo：CN11-1167/P
Located in Nanning County of Sichuan Province, the Paoma lead-zinc deposit is a stratabound deposit in a cataclastic zone of Lower Cambrian Maidiping dolomite. Being a reworked sedimentary stratoid (irregular) lead-zinc deposit, it includes two ore horizons. Pb and Zn in the ore deposit are economic elements possessing an average grade of 6% ～9%, with the grade of rich ore in excess of 30%. The sphalerite Rb-Sr isochron age of (200 ±1) Ma by TIMS method suggests an age of Late Indosinian-Early Yanshanian. This ore deposit has the same age as the Huize lead-zinc deposit in