新疆祁漫塔格于沟子铁多金属矿辉钼矿Re-Os年龄及其地质意义  

Re-Os Dating of Molybdenite From the Yugouzi Fe-Cu(Mo) Deposit in Qimantage,Xinjiang and its Geological Implications

作　　者：周建厚[1] 丰成友[1] 王辉[1] 周安顺[2] 

机构地区：[1]中国地质科学院矿产资源研究所,北京100037 [2]吉林省地质调查院,吉林长春130061

出　　处：《地质与勘探》2014年第1期1-7,共7页Geology and Exploration

基　　金：中国地质调查局地质调查项目(1212011085528);国家自然科学基金项目(批准号:41172076);中国地质调查局高层次地质人才培养计划(201309);青年地质英才计划(201112)联合资助

摘　　要：于沟子铁-稀有多金属矿区位于东昆仑祁漫塔格矿集区西段,其中铁铜(钼)多金属矿体主要分布于正长花岗岩与狼牙山组碳酸盐岩接触带矽卡岩内,属于矽卡岩型铁铜(钼)多金属矿床,而铌(铷)等稀有-稀土矿化带分布于正长花岗岩和二长花岗岩内。于沟子铁铜(钼)多金属矿床磁铁矿石中的辉钼矿Re-Os定年表明,辉钼矿中含有对Re-Os定年产生较大影响的普通Os,在扣除普通Os后,辉钼矿Re-Os等时线年龄为(210.1±4.8)Ma(n=5,MSWD=0.37),厘定其成矿年龄为晚三叠世,是东昆仑祁漫塔格印支期大规模成矿作用的产物。The Yugouzi iron-REE deposit is located in the western part of the Qimantage area of eastern Kunlun, where the iron-copper （molybde- num） polymetallic ore bodies are situated in the skarns between moyite and carbonate strata of Layasban Formation while niobium, rubidium and other rare metal ore bodies situated in orthoelase granite and adamelhte, Re-Os dating of molybdenite in magnetite ore front the Yugouzl Fe-Cu（Mo） polymetallic ore bodies suggests the presence of some common as influencing the accuracy of Re-as dating. Re-as isochron age of mo[ybdenite is （210.1 ± 4.8 ） Ma （ n = 5, MSWD = O. 37 ） after removal of common as, defining the mineralization age of Fe-Cu（Mo） polymetallic ore bodies in Late Triassic. It is a result of large-scale mineralization in the Qimantage area of eastern Kunlun in Indo-Chinese Epoch.

关 键 词：辉钼矿RE-OS定年 普通Os 于沟子铁多金属矿 祁漫塔格 东昆仑 

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