中国地质2013，Vol.40Issue(1)：302-311,10.
西藏雄村斑岩铜矿床辉钼矿Re-Os同位素体系
The Re-Os isotope system of the Xiongcun porphyry copper-gold deposit, Tibet
摘要
Abstract
Re-Os dating of molybdenite is an efficient means to restrict the time of mineralization. The age of mineralization of the Xiongcun porphyry copper-gold deposit is confined between 171 Ma and 175 Ma based on this study and other data available. No. Ⅰ ore body of the Xiongcun deposit was affected by later magmtic thermal event. Molybdenite contains trace K-Si silicate enriched in Re. As a result of this event, the Re content of molybdenite is one to four times higher than that of molybdenite in No.Ⅱ ore body and No. Ⅲ ore body, and the age of molybdenite in No. Ⅰ ore body is younger than the real age. The authors also compared the Re content of molybdenite between this deposit and other porphyry-skarn deposits within this belt and found that the content of Re shows systematic variation. The Re content of the Xiongcun porphyry copper-gold deposit is one order of magnitude high than that of Miocene porphyry deposits and two order of magnitude higher than Paleocene to Eocene porphyry-skam deposits. The Re variation is related to the source of metal, the content of molybdenum, the composition of magma and the physical/chemical condition of magmatic -hydrothermal solution.关键词
Re-Os同位素/斑岩铜金矿床/岛弧型/雄村/冈底斯/西藏Key words
Re-Os isotope/porphyry copper-gold deposit/Xiongcun/Gangdise/Tibet分类
天文与地球科学引用本文复制引用
黄勇,唐菊兴,丁俊,张丽,郎兴海..西藏雄村斑岩铜矿床辉钼矿Re-Os同位素体系[J].中国地质,2013,40(1):302-311,10.基金项目
国家自然科学基金(41172077)、中国地质调查局地质大调查项目(1212011221073)共同资助. （41172077）
