Molybdenite Re-Os Isotopic Dating of Sangbujiala Copper Deposit in the South Margin of the Eastern Gangdese Section, Tibet, and Its Geological Implications

详细信息   

• 责任者：Zhao Zhen (Institute of Geomechanics ; Chinese Academy of Geological Sciences ; Beijing 100081 ; China) ; Hu Daogong
• 刊名：Journal of Geomechanics
• 出版年：2012
• 卷期：18(2)
• 关键词：辉钼矿 ; molybdenite ; 铼—锇计时 ; Re-Os dating ; 西藏 ; Tibet
• 页码：p.178-186
• 图表：5 illus., 1 table, 30 refs.
• 分类号：1001
• issnNo：ISSN1006-6616
• isbnNo：CN11-3672/P

摘要

Located in north side of Yaluzangbujiang suture, Sangbujiala skarn-type copper deposit is one of the typical polymetallic deposits in the south subzone of the Gangdise metallogenic belt. For the purpose of finding out the mineralization time, the authors selected eight molybdenite samples from Sangbujiala ore district to perform the Re-Os dating. The age of Re-Os isotime line from molybdenite is 93.3 ~4. 1 Ma, with an average model age of 94.5 ~ 1.6 Ma. Therefore, the Sangbujiala ore formed during Late Cretaceous, which belongs to the Neo-Tethys subduction stage. The Sangbujiala ore and other Cenozoic deposits showed that the Gangdise metallogenic belt occurring large-scale mineralization in the subduction stage, main collision stage, late collision stage and post-collisional stage, and to form a complete series of metallogenie evolution.