Mineral chemistry and isotope geochemistry of pyrite from the Heilangou gold deposit, Jiaodong Peninsula, Eastern China

查看全文 作　　者：Yutong [1]Yan;Na [2]Zhang;Shengrong [2]Li;Yongsheng [3]Li

机构地区：[1]Faculty of City and Environmental Science, Xinyang Normal University;[2]State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences (Beijing);[3]Heilongjiang Seismological Bureau

出　　处：《Geoscience Frontiers》索引2014年第5卷第2期,共9页

基　　金：funded by National Natural Science Foundation Major Research Plan Key Support Project (Grant No. 90914002);the Xinyang Normal University high-level talented person start-up project in China 摘　　要：The Heilangou gold deposit is located in the northern QixiaePenglai gold belt, which is one amongst the three large gold belts in the eastern Shandong Province(Jiaodong Peninsula). The ore body has formed within the Guojialing granite. In this study, we report the mineral chemistry of pyrite, as well as the S, Pb,and HeO isotope data of the Heilangou gold deposit. The chemical composition of pyrite in the Heilangou gold deposit indicates that the associated gold deposit is a typical magmatic hydrothermal one. The geochemical signatures and crystal structure of pyrite show that the ore-forming materials have been derived from the crust. The S isotope data of the pyrites from Heilangou show an overall range from 5.5 to7.8& and an average of 6.7&. The S isotope data in this deposit are similar to those from the deposits in the Jiaodong gold belt. The Pb and S isotope variations are small in the Heilangou gold deposit. The206Pb/204Pb,207Pb/204Pb and208Pb/204Pb ratios are 17.4653-17.5958, 15.5105-15.5746 and 38.0749-38.4361, respectively. These data plot between the lower crust and the orogenic belt. The Pb isotope data in the Heilangou gold deposit are similar to those in the Linglong gold deposit. From the Qixia gold area(the Liukou and Majiayao gold deposits) to the MupingeRushan gold belt(Rushan gold deposit) to the ZhaoeYe gold belt(the Linglong, Sanshandao and Jiaojia gold deposits), the206Pb/204Pb ratios progressively increase. The DeO isotope data obtained from quartz separates suggest that the ore-forming fluid was similar to a mixture of magmatic and meteoric waters. These results suggest that the ore-forming elements were primarily from source fluids derived from the lower crust. 关键词：同位素地球化学矿物化学成分胶东半岛金矿带黄铁矿中国东部硫同位素岩浆热液

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Mineral chemistry and isotope geochemistry of pyrite from the Heilangou gold deposit, Jiaodong Peninsula, Eastern China

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