湖南雪峰山地区铲子坪和大坪金矿成矿作用年代学研究  

Study on Chronology of the Chanziping and Daping gold deposit in Xuefeng Mountains,Hunan Province

作　　者：李华芹[1] 王登红[2] 陈富文[1] 梅玉萍[1] 蔡红[1] 

机构地区：[1]中国地质调查局宜昌地质矿产研究所,湖北宜昌443003 [2]中国地质科学院矿产资源研究所,北京100037

出　　处：《地质学报》2008年第7期900-905,共6页Acta Geologica Sinica

基　　金：国家科技支撑计划“南岭地区有色-贵重金属成矿潜力及探测综合技术示范研究”课题(编号2006BAB01B03);中国地质大调查“我国重要矿产和区域成矿规律研究”项目(编号1212010633903);“中国成矿体系综合研究”项目(编号1212010634002);“我国西部重要成矿区带矿产资源潜力评估”(编号1212010535804)资助的成果

摘　　要：湘西铲子坪和大坪等大型金矿是雪峰山地区颇具代表性的金矿床。本次研究获得该两矿床含金石英脉Rb-Sr等时线年龄分别为205.6±9.4Ma和204.8±6.3Ma,矿区外围黄茅园黑云母花岗岩体锆石SHRIMPU-Pb年龄为222.3±1.7Ma,测定结果表明成岩和成矿作用均发生于印支期,成矿作用可能与区域性逆冲-推覆作用及相伴生的酸性岩浆侵位密切相关;矿床成因类型应为岩浆热液型,而不宜归为韧性剪切带型或构造蚀变岩型。The Chanziping and Daping gold deposits, located in Qianyang and are two representative ones in the Xuefeng Mountains, western Hu isochron ages of the two deposits are 205.6±9.4Ma and 204.8±6.3Ma, dating errors with the zircon SHRIMP U-Pb（222.3±1.7Ma） of the Hu periphery of the two orefields, which indicates that the diagenetic mi Hongjiang County, respectively, nan Province. The quartz Rb-Sr respectively, they are consistent in angmaoyuan biotite granite in the neralization happened during the Indosinian Period and the gold mineralization might have been related to regional thrust-nappe events and accompanying acidic magmatism;the two deposits should be attributed to magmatic hydrothermal origin, rather than ductile shearing belt type or structural alteration type.

关 键 词：铲子坪金矿 大坪金矿 成矿年代学 雪峰山地区 湖南 

分 类 号：P618.51[天文地球—矿床学] P597[天文地球—地质学]