内蒙古阿拉善呼伦西白金矿的成矿时代  

METALLOGENIC EPOCH OF HULUNXIBAI GOLD DEPOSIT IN ALASHAN AREA,INNER MONGOLIA AUTONOMOUS REGION

作　　者：李俊建[1,2] 骆辉[2] 周学武[1] 周红英[1,2] 孙政平[3] 王守光[3] 

机构地区：[1]中国地质大学"岩石圈构造,深部过程及探测技术"教育部重点实验室,北京100083 [2]天津地质矿产研究所,天津300170 [3]内蒙古自治区地质调查院,内蒙古呼和浩特010020

出　　处：《现代地质》2004年第2期193-196,共4页Geoscience

基　　金：中国地质调查局国土资源大调查项目 (199910 2 0 2 180 0 3 ;2 0 0 110 2 0 0 0 3 8)

摘　　要：内蒙古阿拉善呼伦西白金矿产于呼伦西白花岗岩体的内外接触带的中 ,矿体受构造破碎带的控制 ,由蚀变浸染型矿体和穿插其间的含金石英脉透镜体构成。采用单颗粒锆石U Pb法和石英的40 Ar/ 3 9Ar法 ,直接测定了含金石英脉的形成年代 ,结果表明呼伦西白金矿的形成年代为 319 5～ 348 84Ma 。In Alashan area, Inner Mongolia Autonomous Region, the Hulunxibai gold deposit locates in the inner and outer contact belts of Hulunxibai granite. The ore boods are controlled by the zones of fracturs, and consist of altered disseminated ore bodies and Au-bearing quartz vein lens. By single zircon U-Pb and quartz ()^(40)Ar/()^(39)Ar methods, the ages of Au-bearing quartz vein were directly detected. The results shown that the metallogenic epoch of Hulunxibai gold deposit is 319.5 Ma to 348.84 Ma, that is middle Variscan period.

关 键 词：成矿时代 金矿 呼伦西白 内蒙古阿拉善地区 

分 类 号：P618.51[天文地球—矿床学]