The gold-telluride connection:Evidence for multiple fluid pulses in the Jinqingding telluride-rich gold deposit of Jiaodong Peninsula,Eastern China  

作　　者：Wenyan Cai Mingchun Song M.Santosh Jian Li 

机构地区：[1]School of Resources and Environmental Engineering,Shandong University of Technology,Zibo 255049,China [2]Hebei Key Laboratory of Strategic Critical Mineral Resources,Hebei GEO University,Shijiazhuang 050031,China [3]School of Earth Sciences and Resources,China University of Geosciences Beijing,29 Xueyuan Road,Beijing 100083,China [4]Department of Earth Science,University of Adelaide,Adelaide SA 5005,Australia

出　　处：《Geoscience Frontiers》2024年第3期146-165,共20页地学前缘（英文版）

基　　金：supported by the National Natural Science Foundation of China-Shandong Joint Fund(No.U2006201);Shandong Natural Science Foundation(No.ZR2021QD056);National Key R&D Program of China(2023YFC2906901).

摘　　要：The mechanism of gold migration,enrichment,and precipitation in forming world-class gold deposits has been a topic of wide interest,particularly where these deposits are abundant in tellurides.The Jiaodong Peninsula in eastern China hosts some of the world-class gold deposits among which the Jinqingding deposit is one of the best examples with substantial telluride mineralization and thus provides opportunity to investigate the genetic connection between tellurium and gold mineralization.The orebody in this deposit is hosted in the NE-NNE-trending Jiangjunshi-Quhezhuang fault with the Jurassic Kunyushan granitic pluton as wall rock.The deposit involved three mineralization stages as inferred from assemblages and crosscutting relationships between veins.These stages are:(I)pre-ore gold-poor quartz-pyrite veins,(II)main ore auriferous quartz-pyrite-Te/Bi-minerals±sphalerite±chalcopyrite±barite±marcasite veins,and(III)post-ore quartz-calcite veins.We present here the textural,isotopic,and geochemical variations of different stages/generations of pyrite based on scanning electron microscopy-energy dispersive spectroscopy(SEM-EDS),electron probe microanalysis(EPMA),and laser ablation inductively coupled plasma mass spectrometry(LA-ICP-MS).Pyrite in the Jinqingding deposit displays distinct characteristics.Py1a shows a porous and dissolution-reprecipitation texture in the core,whereas Py1b exhibits a smooth and flat rim.Geochemical analysis reveals contrasting elemental compositions,with Py1a characterized by low Au(avg.0.14 ppm),As(avg.15.57 ppm),Ag(avg.17.71 ppm),and Te(avg.19.22 ppm)contents,but elevated Co(avg.1068.10 ppm)and Ni(224.12 ppm)concentrations,and variable sulfur isotopic composition(δ^(34)SV-CDT=9.54‰-12.12‰).Conversely,Py1b displays increased concentrations of these elements and a more concentratedδ^(34)SV-CDT value(11.99‰-12.23‰),possibly associated with weak coupled dissolution-reprecipitation(CDR)processes.In Stage II,pyrite can be further categorized into two generations:the porous co

关 键 词：Episodic fluid pulses Sulfur reservoir Gold-Te precipitation Jinqingding deposit Jiaodong Peninsula 

分 类 号：P588.11[天文地球—岩石学]