地质通报2016，Vol.35Issue(4)：524-530,7.
内蒙古东乌旗沙麦钨矿床的成矿时代
The metallogenic age of the Shamai wolframite deposit in Dong Ujimqin Banner, Inner Mongolia
摘要
Abstract
The Shamai wolframite deposit in Dong Ujimqin Banner of Inner Mongolia is located within the Erlian-Dong Ujimqin Banner arc-basin belt in the Da Hinggan Mountains-Inner Mongolia orogenic belt south of the Ergenshan fault. It is a postmagmatic high-temperature hydrothernal deposit. In this paper, wolframite Sm-Nd isotope analysis of the deposit yielded an ore formation age of 137.9 ± 1.7Ma, whereas TIMS zircon U-Pb dating of samples from the wall rock biotite granite yielded a petrogenetic age of 139.1±0.93Ma. These isotopic ages indicate that the mineralization of Shamai wolframite deposit occurred in late Yanshanian, consis⁃tent with the age of the formation of the main ore deposits on the west slope of the Da Hinggan Mountains regionally. Consistent with the positive initial εNd value of granites scattered in central Asian orogenic belt, the initial εNd value of the wolframite is posi⁃tive, indicating a depleted mantle source.关键词
黑钨矿/黑云母花岗岩/锆石U-Pb年龄/Sm-Nd同位素年龄/沙麦Key words
wolframite/biotite granite/zircon U-Pb age/Sm-Nd isotope age/Shamai分类
天文与地球科学引用本文复制引用
李俊建,赵丽君,付超,唐文龙,李惠民,林源贤,张彤,王守光,赵泽霖,党智财..内蒙古东乌旗沙麦钨矿床的成矿时代[J].地质通报,2016,35(4):524-530,7.基金项目
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）和国家国际科技合作项目 （）
