Laser Microprobe 40Ar/39Ar Dating on Vein Quartz Containing Mo and Cu in the Bangpu Porphyry-Type Mo-Cu Polymetallic Deposits, Tibet
详细信息
- 责任者：Zhou Xiong (College of Geosciences ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Wen Chunqi
- 刊名：Journal of Mineralogy and Petrology
- 出版年：2011
- 卷期：31(1)
- 关键词：斑岩钼矿床 ; porphyry molybdenum deposit ; 斑岩铜矿床 ; porphyry copper deposit ; 多金属矿 ; polymetallic ores ; 氩—氩计时 ; Ar-Ar dating ; 西藏 ; Tibet
- 页码：p.43-48
- 图表：5 illus., 2 tables, 31 refs.
- 分类号：1001
- issnNo：ISSN1001-6872
- isbnNo：CN51-1143/TD
摘要
ry name="EnDivSummary">Continuous laser microprobe 40Ar/39Ar technique has been used to analyze the ore-bearing vein quartz, in the Bangpu porphyry-type Mo-Cu polymetallic deposits. A 40Ar/39Ar isochron gives out an age of (13.9 ±0.9) Ma (MSWD=29), representing the age of mineralization which is somewhat lower than the crystallization age (13.9±0.9) Ma, MSWD=3.05) of monzonite granite-porphyry, and indicating that the rock-forming and ore-forming process is a continuous magmatic process. Meanwhile, a statistic study of rock-forming and ore-forming ages of Gangdese porphyry copper belt shows that its peak progress age is 15 Ma with the linear equation of Yrock=1.291Xore+7.785(R2=0.291), suggesting that the formation of Bangpu deposit is the same as the Gangdese belt, characterized by explosive ore-forming progress with uniform and intensive ore-forming events.