江西金溪熊家山钼矿床特征及其Re-Os年龄  

The Geological Characteristics and Re-Os Isotope Age of Molybdenite of the Xiongjiashan Molybdenum Deposit,Jiangxi Province

作　　者：孟祥金[1] 侯增谦[2] 董光裕 刘建光 屈文俊[4] 杨竹森[1] 左力艳[1] 万禄进 肖茂章 

机构地区：[1]中国地质科学院矿产资源研究所,北京100037 [2]中国地质科学院地质研究所,北京100037 [3]江西地勘局912地质大队,鹰潭335000 [4]中国地质科学院国家地质试验测试中心,北京100037

出　　处：《地质学报》2007年第7期946-951,共6页Acta Geologica Sinica

基　　金：自然科学基金项目(编号40573024);江西地勘局科技基金资助的成果

摘　　要：位于武夷隆起带西坡的江西熊家山钼矿床具有独特的矿化特点。本文概要地介绍了该钼矿的矿床地质特征,通过对辉钼矿的Re-Os同位素组成的测试分析,获得模式年龄151.7~161.6Ma,并计算出等时线年龄为152±20Ma,钼矿成矿作用发生于燕山早期。通过与我国大量的与岩浆作用有关的铜铅锌银多金属矿床辉钼矿Re含量的对比分析,揭示出熊家山钼矿成矿物质来源于上地壳,成矿构造背景归属于武夷隆起成矿带而不是赣东北构造成矿带。Xiongjiashan molybdenum deposit in the western slope of the Wuyi mountain has shown particular feature of molybdenum mineralization. The molybdenum mineralization occurred in Caledonia granite and metamorphic rocks of Sinian system and the ores comprise molybdenite-quartz vein, molybdenitechalcopyrite-quartz vein, molybdenite-fluorite-quartz vein and molybdenite vein types. Those veins all occurred in structure cranny. Re-Os dating of molybdenites yields model ages between 151.7~161.6 Ma and an isochron age of 152± 20 Ma, which shows that the deposit formed in the Early Yanshanian. By comparison with the published data of the rhenium content of molybdenites in the Mo-bearing copper lead zinc silver polymetallic deposits related to granite in China, it is proposed that the ore materials of the Xiongjiashan molybdenum deposit originated from the pure crust source and indicates that the metallogenic setting of the deposit was belong to Wuyi metallogenic belt, but not northeastern Jiangxi metallogenic belt.

关 键 词：RE-OS年龄 钼矿床 成矿背景 熊家山 江西 

分 类 号：P618.65[天文地球—矿床学]