Zircon LA-ICP-MS U-Pb and Molybdenite Re-Os Dating of the Dabaoshan Polymetallic Deposit in Northern Guangdong Province and Its Geological Implications
详细信息
- 责任者：Wang Lei (Wuhan Institute of Geology and Mineral Resources ; China Geological Survey ; Wuhan 430223 ; China) ; Hu Ming’an
- 刊名：Geology in China
- 出版年：2012
- 卷期：39(1)
- 关键词：多金属矿 ; polymetallic ores ; 辉钼矿 ; molybdenite ; 铀—铅计时 ; U-Pb dating ; 铼—锇计时 ; Re-Os dating ; 湖北 ; Hubei Province
- 页码：p.29-42
- 图表：8 illus., 2 tables, 64 refs.
- 分类号：1001
- 出版序号：20130250
- issnNo：ISSN1000-3657
- isbnNo：CN11-1167/P
摘要
LA-ICP-MS U-Pb dating of zircons from subdacitic porphyry samples yielded a weighted mean 206Pb/238U age of (174.6±1.5) Ma (MSWD=0.7) in the Dabaoshan polymetallic deposit of northern Guangdong Province. Re-Os dating of three molybdenite samples from porphyry and skarn ores yielded consistent model ages from (163.2±2.3) Ma to (165.2±2.4) Ma. Based on geochemical diagrams of Y+Nb-Rb and Rb/30-Hf-Ta×3 in combination with previous studies, the authors suggest that the Dabaoshan polymetallic deposit is related to post-collisional lithosphere extension in the Nanling region of South China.