白云鄂博稀土矿床中辉钼矿的铼-锇同位素年龄  

THE Re-Os ISOTOPIC AGE OF MOLYBDENITE FROM BAYAN OBO REE ORE DEPOSIT

作　　者：刘兰笙[1] 高翎[1] 杜安道[2] 孙亚莉[2] 

机构地区：[1]中国地质科学院地质研究所 [2]中国地质科学院测试研究所

出　　处：《矿床地质》1996年第2期188-191,共4页Mineral Deposits

摘　　要：白云鄂博铁稀土矿床的形成年龄一直是个有争论的问题，采自该矿床东采场的辉钼矿样，通过镜下对矿物结构构造的研究，认为辉钼矿是矿区晚期矿脉形成阶段的矿物，它的铼－锇同位素年龄为（４３９±８）×１０＾６ａ。此结果从另一侧面说明该矿床在加里东期有一期成矿作用。The Bayan Obo deposit is one of the famous REE ore deposits in the world,and its forma- tion age has long been a topic of controversy.Iron and REE orebodies occur in the dolomite bed of 8th lithologic member of Bayao Obo Group.The molybdenite sample from the eastern orebody is regarded as a product associated with late mineralization,and its Re-Os isotopic age is(439± 8)×10~6 a.This result proves from another aspect that there existed an ore-forming process in Caledonian period.

关 键 词：辉钼矿 铼 锇 稀土矿床 同位素年龄 

分 类 号：P618.704[天文地球—矿床学]