内蒙古化德县三胜钨钼矿床辉钼矿Re-Os同位素年龄及其地质意义  

Re-Os isotopic dating of molybdenites from the Sansheng W-Mo deposit in Huade County,Inner Mongolia,and its geological significance

作　　者：李俊建[1] 周勇[2] 党智财 赵泽霖[1,2] 李超[3] 屈文俊[3] 曹子存 杨国建 付超 唐文龙 

机构地区：[1]中国地质调查局天津地质调查中心,天津300170 [2]中国地质科学院研究生部,北京100037 [3]中国地质科学院国家地质实验测试中心,北京100037 [4]华北地质勘查局核工业247大队,天津301800

出　　处：《地质通报》2016年第4期531-536,共6页Geological Bulletin of China

基　　金：中国地质调查局项目(编号:1212010561510;1212010811061;1212011120330;12120114001201;1212010781028;1212011085488;121201006000150015);国土资源公益性行业科研专项(编号:200811010);国家国际科技合作项目(编号:2012DFB20220)

摘　　要：内蒙古化德县三胜钨钼矿床位于华北陆块北缘,为岩浆期后中高温热液型矿床。采用辉钼矿Re-Os同位素分析获得辉钼矿的模式年龄加权平均值为138±1Ma,等时线年龄为138.6±1.4Ma,推测三胜钨钼矿床的形成时代为燕山晚期,这与区域上华北陆块北缘主要金属矿床的形成年龄吻合。辉钼矿的Re含量平均值为0.5548×10^(-6),表明其主要为地壳来源特征。成矿发生在陆内构造环境,为燕山期大规模构造-岩浆作用的产物。Located in Huade Country of Inner Mongolia on the northern margin of North China Block,the Sansheng W-Mo deposit is a postmagmatic mesothermal deposit. Molybdenite Re-Os isotope analysis of the deposit was conducted in this paper,which yielded the weighted average value of the molybdenite model age of 138±1Ma and isochron age of 138.6±1.4Ma. In consideration of the age data,the authors hold that the Sansheng W-Mo ore deposit was formed in late Yanshanian period,consistent with the age data of the formation of main ore deposits in this region. Rhenium content in molybdenite is 0.5548×10^（-6）,indicating the crustal origin. The ore-forming event resulted from large-scale Yanshanian tectonic and igneous activities and took place in an intracontinental tectonic environment.

关 键 词：辉钼矿 RE-OS同位素年龄 三胜钨钼矿床 

分 类 号：P618.65[天文地球—矿床学] P597.3[天文地球—地质学]