西藏申扎县舍索铜多金属矿床辉钼矿Re-Os年代学及地质意义  

Re-Os Dating of Molybdenite from the Shesuo Copper Polymetallic Ore in Shenzha County,Tibet and Its Geological Significance

作　　者：赵元艺[1] 宋亮[2] 樊兴涛 石登华 张天平 陈红旗 屈文俊 

机构地区：[1]中国地质科学院矿产资源研究所,北京100037 [2]中国地质大学(北京),北京100083 [3]国家地质试验测试中心,北京100037 [4]西藏地质矿产勘查开发局第五地质大队,青海格尔木816000

出　　处：《地质学报》2009年第8期1150-1158,共9页Acta Geologica Sinica

基　　金：国家科技支撑课题"西藏班公湖岛弧带铜;金;富铁矿评价与综合找矿技术方法示范研究"(编号2006BAB01A05)之专题"区域成矿模型与典型矿床成因模型研究"项目;中国地质调查局青藏专项(编号1212010818097)共同资助成果

摘　　要：舍索铜多金属矿床位于西藏申扎县雄梅乡政府所在地南4km处。为现今在冈底斯北麓正在开采的少数矽卡岩型铜矿床之一。由辉钼矿测年结果可以看出,Re-Os等时线为116.2±1.9Ma,而模式年龄的平均值为115.7±1.3Ma。因此,舍索矿床的成矿年龄应为116Ma,为燕山晚期的产物。其成矿年龄与冈底斯成矿带的相距较远,而与班公湖-怒江成矿带的相近,为班公湖-怒江缝合带闭合之后碰撞后阶段的产物,其成矿物源可能主要为壳源。The Shesuo copper polymetallic ore deposit is located in 4km of south of Xiongmei Town, Shenzha County, Tibet. It is one of several deposits in the northern part of the Gangdis ore belt under the production at present. The age of Re-Os isotime line from molybdenite is 116.2±1.9 Ma, with an average model age of 115.7±1.3 Ma. Therefore, the age of Shesuo copper polymetallic ore deposit is likely 116 Ma and the product at late Yanshan epoch. Its age is obviously different from that of Gangdise ore belt,Ma and the product at late Yanshan epoch. Its age is obviously different from that of Gangdise ore belt, but similar to that of Bangong Co-Nujiang belt. This deposit should be the result of postcollision after the closure of Bangong Co-Nujiang suture belt and its ore-forming material may be closely related to the crustual source.

关 键 词：Re-Os等时线 辉钼矿 矽卡岩型铜多金属矿床 舍索 西藏 

分 类 号：P597.3[天文地球—地球化学] P618.2[天文地球—地质学]