河南银洞沟银金钼矿床铼-锇同位素定年和加里东期造山-成矿事件  

Re-Os isotope dating of the Yindonggou Ag-Au-Mo deposit,Henan province and its implication for Caledonian orogenic-metallogenic event

作　　者：李晶[1] 仇建军[2,3] 孙亚莉[1] 

机构地区：[1]中国科学院广州地球化学研究所成矿动力学重点实验室,广州510640 [2]中国地质大学(北京),北京100083 [3]河南省有色金属地质矿产局第三地质大队,郑州450016

出　　处：《岩石学报》2009年第11期2763-2768,共6页Acta Petrologica Sinica

基　　金：国家973项目(2006CB403506和08课题);国家自然科学基金项目(40730421,40702013,40425006,40502012)资助

摘　　要：河南内乡银洞沟银金钼矿床是夏馆银多金属矿田新发现的造山型矿床,赋矿地层为新元古代-早古生代弧后盆地堆积的二郎坪群火山-沉积岩系,二郎坪群在志留纪或加里东运动中遭受区域变形和变质。矿床5件辉钼矿Re-Os同位素模式年龄介于423.4±4.4～432.2±3.4Ma,加权平均年龄为429.3±3.9Ma(MSWD=0.73),指示秦岭地区存在显著的加里东期造山-成矿事件。The Yindonggou Ag-Au-Mo deposit,located in Neixiang County,Henan Province,is a recently discovered orogenic-type ore deposit in the Xiaguan Ag-dominant poly-metal ore-field.The deposit is hosted in the Erlangping volcanic-sedimentary sequence which was deposited in a Neoproterozoic-Early Paleozoic back-arc basin and regionally deformed and metamorphosed in Caledonian Movement or Silurian period.Five molybdenite samples from the deposit yield Re-Os isotope model ages of 423.4±4.4～432.2±3.4 Ma,with an average...

关 键 词：辉钼矿铼-锇同位素年龄 银洞沟银金钼矿床 夏馆银多金属矿田 秦岭造山带 加里东运动 

分 类 号：P597.3[天文地球—地球化学]