胶东海域金矿床元素富集贫化特征及深部预测  

Elements enrichment and dilution characteristics and deep metallogenic prognosis in the Haiyu gold deposit,Jiaodong Peninsula

作　　者：张亮亮 朱立新 马生明[1] 林少一 戴长国 周明岭 霍光 徐忠华 席明杰[1] 张涛 ZHANG Liang-Liang;ZHU Li-Xin;MA Sheng-Ming;LIN Shao-Yi;DAI Chang-Guo;ZHOU Ming-Ling;HUO Guang;XU Zhong-Hua;XI Ming-Jie;ZHANG Tao(Institute of Geophysics and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang 065000,China;No.6 Institute of Geology and Mineral Resources,Weihai 264200,China;China Geological Survey,Beijing 100037,China)

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000 [2]山东省第六地质矿产勘查院,山东威海264200 [3]中国地质调查局,北京100037

出　　处：《物探与化探》2021年第4期835-845,共11页Geophysical and Geochemical Exploration

基　　金：国家重点研发计划项目(2018YFE0208300);中国地质调查局地质调查项目“矿集区矿产调查及深部找矿预测”(DD20190571);国家科技支撑计划项目“胶西北金矿深部找矿地球化学方法与集成与示范”(2014BAB05B00)联合资助

摘　　要：三山岛海域金矿床是近年来发现的超大型金矿床,已探明金储量470 t、平均品位4.30×10^(-6),属于典型的焦家式金矿床。本文选择海域金矿床为研究对象,开展钻孔岩石测量,结果发现,在赋矿构造蚀变带内,Au、Cu、Pb、Zn、Ag、As、Sb、Cd、Bi、S、Fe 2O 3等发生富集,Na 2O、Ba、Sr则发生贫化。在此基础上,按照矿源岩和构造蚀变带总结了地球化学勘查标志,其中,矿源岩的典型地球化学勘查标志是富S和Au,即矿源岩内出现S、Au的正异常;构造蚀变带的典型地球化学勘查标志是富S、Au、Ag、Bi,贫Na 2O、CaO,即构造蚀变带内S、Au、Ag、Bi呈现正异常,Na 2O、CaO呈现负异常。利用上述元素及其异常,构建了海域金矿床矿致异常模式,为该矿床外围和深部金矿勘查提供了有益借鉴,提出了海域金矿成矿带主体深部可能沿ZK2403、ZK3008、ZK3814钻孔连线呈NEE向展布。The Haiyu gold deposit,as a superlarge gold deposit with gold reserves of 470 t and average grade of 4.30×10^(-6),is a typical Jiaojia-type gold deposit.The authors carried out the rock geochemical survey by the samples from drillholes,and detected the enrichment of Au,Cu,Pb,Zn,Ag,As,Sb,Cd,Bi,S and Fe 2O 3 and the depletion of Na 2O,Ba and Sr in the ore-hosting tectonic alteration zone.The authors systematically summarized the geochemical marks used for exploration.The enrichment of S and Au,or called the positive S and Au anomalies,is the typical geochemical mark of the source rock.The enrichment of S,Au,Ag and Bi and the depletion of Na 2O and CaO are typical geochemical marks of the tectonic alteration zone.Based on the above elements and their anomalies,the authors constructed the ore-induced anomaly model of the Haiyu gold deposit,which provides a useful reference for the exploration of the peripheral and deep-seated gold deposits.It is proposed that the main gold orebodies of the ore-forming zone of the sea field may be along ZK2403,ZK3008,and ZK3814 boreholes spread in NEE direction.

关 键 词：海域金矿 岩石地球化学测量 富集贫化 矿致异常模式 

分 类 号：P632[天文地球—地质矿产勘探]