江西金山金矿田朱林西—竹叶岭金矿区硫、铅同位素地球化学特征及其成因意义  

Geochemical characteristics of sulfur and lead isotopes in Zhulinxi-Zhuyeling Gold District in Jinshan Gold Field,Jiangxi Province and their genetic significance

作　　者：刘国荣[1] 赵辉[1] 卢树东 丁高明[3] 唐一昂 肖红[1] Liu Guorong;Zhao Hui;Lu Shudong;Ding Gaoming;Tang Yiang;Xiao Hong(China Gold Group Geology Co.,Ltd.;Beijing Jinyou Geological Exploration Co.,Ltd.;China Gold Group Resources Co.,Ltd.)

机构地区：[1]中国黄金集团地质有限公司 [2]北京金有地质勘查有限责任公司 [3]中国黄金集团资源有限公司

出　　处：《黄金》2018年第10期3-10,共8页Gold

基　　金：地质找矿科研项目(中金股运营[2016]188号)

摘　　要：朱林西—竹叶岭金矿区位于钦杭成矿带东段,通过对其金矿石中黄铁矿开展硫、铅同位素研究,探讨其成矿物质来源,并与周边的金山金矿区展开对比。结果表明,黄铁矿δ34S介于4. 11‰～4. 56‰,平均值为4. 34‰,显示了地幔硫的特点;矿石206Pb/204Pb为17. 681～17. 853,207Pb/204Pb为15. 634～15. 699,208Pb/204Pb为37. 943～38. 098;铅同位素232Th/238U值变化于3. 89～3. 95,平均值3. 92,μ值范围为9. 60～9. 75,均值为9. 69,均大于9. 58,反映矿石具上地壳铅特征。根据同位素特征参数、模式图解、Δγ-Δβ示踪等,认为朱林西—竹叶岭金矿床和金山金矿床的成矿物质来源为双桥山群含金建造,成矿作用与造山作用有关,属岩浆热液矿床,晋宁期为主成矿期,加里东期、海西—印支期、燕山期可能造成早期成矿的次生富集。The Zhulinxi-Zhuyeling Gold District of Jinshan Gold Field,Jiangxi Province is located in the east part of Qinhang metallogenic belt.In this paper,the sulfur and lead isotopes in pyrite minerals of the gold ores were studied to explore the sources of the ore-forming materials which were compared with the nearby Jinshan Gold District.The results show that theδ34 S values of pyrite range between 4.11‰and 4.56‰,with an average of 4.34‰,showing the characteristics of mantle sulphur.206 Pb/204 Pb of the ore is 17.681-17.853,207 Pb/204 Pb is 15.634-15.699 and 208 Pb/204 Pb is 37.943-38.098.Lead isotope 232 Th/238 U value ranges from 3.89 to 3.95,averaging 3.92,μvalue ranges above 9.58,from 9.60 to 9.75,averaging 9.69,showing the characteristics of upper crust lead.Based on isotopic characteristic parameters,model diagrams,andΔγ-Δβtracer,it is revealed that the gold-bearing structure of Shuang-qiaoshan Group is the main ore-forming material source of Zhulinxi-Zhuyeling Gold Mine and Jinshan Gold Mine.The metallogenesis is related to orogenesis.It is a magmatic hydrothermal deposit.The Jinning period is the main mineralization period.Caledonian,Hercynian-Indosinian,and Yanshanian periods may cause secondary enrichment of early mineralization.

关 键 词：地球化学特征 同位素 成矿物质来源 造山作用 岩浆热液矿床 

分 类 号：TD11[矿业工程—矿山地质测量] P618.51[天文地球—矿床学]