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.
出处
《地质通报》
CAS
CSCD
北大核心
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)
