地质学报2018，Vol.92Issue(1)：94-106,13.
钦杭成矿带南段旗鼓岭铜钨钼多金属矿床的辉钼矿Re-Os同位素年龄及成矿物质来源
Re-Os Age of Molybdenite and Ore-Forming Material Source of the Qiguling Cu-W-Mo Polymetallic Deposit in the Southern Section of the Qinghang Metallogenic Belt
摘要
Abstract
The Qiguling Cu-W-Mo polymetallic deposit,located in the Yunkai area,is one of the newly discovered deposits with huge prospecting potential.The ore bodies mainly occur as lamellar,stratiods and lenses in skarn.Based on detailed geologic characteristics of the deposit,this study re determined the metallogenic time of the Qiguling deposit using molybdenite Re-Os dating technology.Precise Re-Os dating of molybdenite shows that the Re-Os model ages of five samples range from 163.6 Ma to 165.3 Ma,with a weighted mean age of 164.54± 0.94 Ma,indicating that the timing for Cu-W-Mo polymetallic mineralization formed in the late stage of the Mid-Jurassic.Rhenium content of molybdenum in the samples ranges from 76.86～86.22 μg/g,and this indicates the ore-forming material is characterized by crust and mantle mixing in origin.δ34S values of pyrites of this deposit have a narrow range of 1.4‰ ～ 2.5‰,showing magmatic sulfur.Determination of metallogenic time for the Qiguling Cu-W-Mo deposit not only provides an important clue to future prospecting for 150～170 Ma porphyry-skarn Cu polymetallic deposits in this area,but also marks the southward extension of the well-known Qinhang metallogenic belt.Therefore,this study offers new information for further research of diagenesis and metallogenesis of the Qinhang metallogenic belt.关键词
旗鼓岭铜多金属矿/辉钼矿Re-Os定年/成矿物质来源/云开地区/钦杭成矿带Key words
Qiguling Cu-W-Mo polymetallic deposit/molybdenite Re-Os dating/sources of ore-forming materials/Yunkai area/the Qinhang metallogenic belt引用本文复制引用
郑伟,欧阳志侠,陈友良,赵海杰,刘东宏,吴晓东,杨胜虎,汪汝澎,楚克磊..钦杭成矿带南段旗鼓岭铜钨钼多金属矿床的辉钼矿Re-Os同位素年龄及成矿物质来源[J].地质学报,2018,92(1):94-106,13.基金项目
本文为国家重点研发计划项目(编号2017YFC0601403)、国家自然科学基金项目(编号41702083)、中国博士后科学基金项目(编号2017M610105)和中国地质调查局地质调查工作项目(编号12120114015801、1212011120826)共同资助成果. （编号2017YFC0601403）
