西藏冈底斯驱龙斑岩型铜钼-矽卡岩型铜矿成矿体系:辉钼矿Re-Os同位素年代学证据  

Qulong Porphyry-Skarn Metallogenic System in Gangdese Belt,Tibet:Evidence from Molybdenite Re-Os Geochronology

作　　者：张金树[1,2] 多吉 夏代祥 钟康惠[1] 吴华 李光明[4] 

机构地区：[1]成都理工大学地球科学学院,成都610059 [2]西藏地质调查院,拉萨850000 [3]西藏巨龙铜业有限公司,拉萨850030 [4]中国科学院地质与地球物理研究所矿产资源研究重点实验室,北京100029

出　　处：《吉林大学学报（地球科学版）》2013年第5期1366-1376,共11页Journal of Jilin University：Earth Science Edition

基　　金：国家"十一.五"科技支撑计划项目(2006BA01A04)

摘　　要：在西藏冈底斯驱龙斑岩型铜钼矿床南部2 km和东南4 km处分别发育知不拉和浪母家果矽卡岩型铜矿床,它们与驱龙斑岩矿床空间上相邻。其中,浪母家果矽卡岩型矿床中辉钼矿Re-Os等时线年龄为(17.11±0.55)Ma,表明其形成时间与驱龙和知不拉相近。综合冈底斯成矿带区域成矿作用和典型矿床的最新研究成果认为,驱龙斑岩型铜钼矿床-知不拉矽卡岩型铜矿-浪母家果矽卡岩型铜矿系同一期岩浆热液成矿作用的产物,构成一个完整的斑岩-矽卡岩型成矿体系。因此,区域找矿时,应注意在斑岩型铜矿外围寻找高品位矽卡岩型矿床;同时,在具有矽卡岩型矿化的勘查区内应注意寻找深部可能存在的斑岩型铜钼矿床。are two typic southeast to t Nearby the Qulong gaint porphyry Cu - Mo deposit at the Gangdese belt in Tibet, there al skarn Cu deposits. The Zhibula deposit is 2 km south and Langmujiaguo is 4 km he Qulong deposit. It＇s reported that the Re - Os isotopic age of the molybdenite dating from Langmujiaguo skarn deposit is （17.11±0.55） Ma. Combined with the published dating data from Qulong and Zhibula, a conclusion can be drawn that those deposits in the Qulong area were derived from the common magmatic hydrothermal mineralization and they may belong to a complete porphyry-skan ore-forming system. More attention should be paid to the porphyry deposits and the adjacently skarn deposits during geological prospecting and exploration at Gangdese belt.

关 键 词：驱龙 浪母家果 斑岩型铜钼矿床 矽卡岩型铜矿 辉钼矿Re—Os同位素测年 同位素 冈底斯 

分 类 号：P618.41[天文地球—矿床学] P618.65[天文地球—地质学]