中国地质Issue(1)：209-220,12.
云南格咱岛弧带南缘铜厂沟斑岩型铜钼矿床硫铅同位素特征与成矿物质来源示踪
Characteristics of sulfur and lead isotopes and tracing of mineral sources in the Tongchanggou porphyry Mo(Cu) deposit at the southern edge of Geza arc belt, Yunnan
摘要
Abstract
Located on the southern margin of the Geza island arc, the Tongchanggou porphyry deposit is a large-sized Mo(Cu) polymetallic deposit discovered in recent years in southwest Sanjiang region. In this paper, the authors investigated the sources of minerals through sulfur and lead isotope tracer study. Testing results show that theδ34S values of ore sulfides vary in the range of -0.7‰—+3.8‰, 0.79‰ on average. The variation range is very small, which indicates a single source of the sulfur isotope and displays the characteristics of magmatic source sulfur isotopic composition. The lead isotopic composition of ore minerals is characterized by 206Pb/204Pb ranging from 18.3325 to 18.694, 207Pb/204Pb ranging from 15.588 to 15.663, and 208Pb/204Pb ranging from 38.454 to 39.008, exhibiting relatively stable Pb isotopic composition and showing the normal lead characteristics. There is a significant positive correlation between lead isotopic composition and characteristic parameters (△βand △γ, V1 and V2). Lead structural model identification and genetic classification comprehensive analysis suggest that the lead isotopes of the Tongchanggou porphyry Mo(Cu) deposit were mainly derived from the depth and show the crust-mantle mixed source characteristics. The mineralization had a close relationship with Yanshanian magmatic intrusion, with the minerals of the strata also making some contribution.关键词
斑岩型铜钼矿床/硫同位素/铅同位素/成矿物质来源/铜厂沟/格咱岛弧南缘Key words
porphyry Mo(Cu) deposit/sulfur isotope/lead isotope/mineral resource/Tongchanggou/southern edge of Geza arc分类
天文与地球科学引用本文复制引用
刘学龙,李文昌,张娜,杨富成,康健,张彪..云南格咱岛弧带南缘铜厂沟斑岩型铜钼矿床硫铅同位素特征与成矿物质来源示踪[J].中国地质,2016,(1):209-220,12.基金项目
中国地质调查局项目（12120114013701）、中国博士后科学基金项目（2014M552547XB）、昆明理工大学省级人培项目（KKSY201421042）联合资助。 （）
