地质通报2017，Vol.36Issue(5)：875-884,10.
湘东南铜山岭铅锌多金属矿床成矿时代与成矿物质来源——Sm-Nd等时线年龄和Pb同位素证据
Metallogenic epoch and ore-forming material source of the Tongshanling Pb-Zn polymetallic deposit in southeastern Hu'nan Province:Evidence from Sm-Nd isochron age and Pb isotope
摘要
Abstract
The Tongshanling Pb-Zn polymetallic deposit is located in the collage part between the southern Hu'nan-northeastern Guangxi depression in the Yangtze Block and the northern Guangdong depression in the Cathaysia Block. It is one of the representa?tive deposits in the Nanling metallogenic province. In order to determine the metallogenic epoch of the Tongshanling Pb-Zn polymetallic deposit, the authors analyzed garnets in mineralized skarn from the deposit using Sm-Nd isotopic system and obtained an isochron age of 173±3Ma which corresponds to early Yanshanian. The metal sulfides were analyzed using Pb isotope compositions and their average ratios of 206Pb/204Pb, 207Pb/204Pb, 208Pb/204Pb are 18.602, 15.701 and 38.729, respectively, indicating that they were mainly derived from relatively uranium lead-enriched and slightly thorium lead-defected upper crust. According to analyzing the dia?gram of (207Pb/204Pb)i-(206Pb/204Pb)i, the hosted granodiorite seems to have been an important material source for the Tongshanling Pb-Zn polymetallic deposit. In addition, ore-forming material probably contained mantle components hosted in the granodiorite of the Tongshanling Pb-Zn polymetallic deposit.关键词
铜山岭铅锌多金属矿床/成矿时代/成矿物质来源/Sm-Nd等时线年龄/Pb同位素Key words
Tongshanling Pb-Zn polymetallic deposit/metallogenic epoch/ore-forming material source/Sm-Nd isochron/Pb iso⁃tope composition分类
天文与地球科学引用本文复制引用
王云峰,杨红梅,张利国,卢山松,杨泽飞,邱啸飞,刘重芃..湘东南铜山岭铅锌多金属矿床成矿时代与成矿物质来源——Sm-Nd等时线年龄和Pb同位素证据[J].地质通报,2017,36(5):875-884,10.基金项目
中国地质调查局项目《扬子周缘典型铅锌矿床同位素年代学研究》(编号:12120114005701)和《扬子工程湘西-鄂西成矿带神农架—花垣地区地质矿产调查》(编号:DD20160029) （编号:12120114005701）
