矿床地质2017，Vol.36Issue(1)：250-264,15.DOI:10.16111/j.0258-7106.2017.01.016
江西东乡铜矿床成因:铜和硫同位素联合约束
Genesis of Dongxiang copper deposit in Jiangxi Province: Constraints from copper and sulfur isotopes
摘要
Abstract
The Dongxiang copper deposit is mainly hosted in the Carboniferous sandstone and Yanshanian granite porphyry.In this paper,the authors investigated the ore-forming materials sources and deposit genesis based on its isotope geochemistry.The values of δ34S(0.3‰～1.2‰) from massive ore and pyrite in granite porphyry in the Dongxiang mine are very close to the values of δ34S in deep mantle,whereas the δ34S values from sulfides exhibit tower distribution type and have a narrow distribution range,indicating that the δ34S was derived from deep source magma.The δ65Cu values of chalcopyrite have a narrow distribution range and are overall close to zero,which are distinctly different from the δ65 Cu values of chalcopyrite in massive sulfide deposits (-0.98‰～ 3.14‰),skarn type deposits(-1.29‰～2.98‰) and hydrothermal vein type deposits(-3.70‰～0.44‰),but are similar to the δ65Cu values of chalcopyrite in magmatic deposits and porphyry deposits.The values of δ65Cu of the Dongxiang copper deposit(-2.10‰～0.17‰)are larger than the δ65Cu values of magma deposits (-0.62‰～0.40‰),but are close to the δ65 Cu values of porphyry deposits (-1.16‰～ 0.81‰),suggesting that the Dongxiang copper deposit had close genetic relationship with magmatism.Therefore,according to the isotope analytical results of the Dongxiang copper deposit,it can be concluded that the Dongxiang copper deposit is a magmatic hydrothermal type deposit.关键词
地球化学/成因/铜-硫同位素/物质来源/东乡铜矿Key words
geochemistry/genesis/Cu-S isotopes/metal source/Dongxiang copper deposit引用本文复制引用
欧阳学财,狄永军,王长明,张达,杨秋,吴彬,王乔,罗政..江西东乡铜矿床成因:铜和硫同位素联合约束[J].矿床地质,2017,36(1):250-264,15.基金项目
本文得到中国地质调查局南京地质调查中心项目“北武夷成矿带东乡浩家岭-上饶梨子坑铜多金属成矿规律及我矿方向研究(编号:1212011220557)”资助 （编号:1212011220557）
