与伟德山期岩浆岩有关的多金属成矿作用研究——以夼北矽卡岩型铜矿床为例  

Research on polymetallic mineralization related to Weideshan Period magmatic rocks-A case study of Kuangbei skarn-type copper deposit

作　　者：王珊珊 丁正江 滕飞 董小涛 吕军阳 王斌 刘家良 Wang Shanshan;Ding Zhengjiang;Teng Fei;Dong Xiaotao;LüJunyang;Wang Bin;Liu Jialiang(No.6 Geological Team of Shandong Provincial Bureau of Geology and Mineral Resources;Technology Innovation Center for Deep Gold Resources Exploration and Mining,Ministry of Natural Resources;Shandong Province Engineering Research Center for Deep Gold Mine Detection Big Data Application Development)

机构地区：[1]山东省地质矿产勘查开发局第六地质大队 [2]自然资源部深部金矿勘查开采技术创新中心 [3]深部金矿探测大数据应用开发山东省工程研究中心

出　　处：《黄金》2024年第10期1-8,共8页Gold

基　　金：山东省重点研发计划(重大科技创新工程)项目(2023CXGC011001);山东省地矿局科技攻关项目(KY202209)。

摘　　要：以米山断裂为界,威海东部地区是胶东地区重要的多金属成矿区,构成了威海东部地区与中生代燕山晚期中酸性侵入岩浆活动有关的铜-钼—铅锌-金银多金属矿成矿系列。通过对区内典型矽卡岩型矿床——夼北铜矿床的矿床地球化学特征、成矿时代、矿床成因进行探究,稀土元素和微量元素测试结果显示,伟德山期岩浆岩的侵入活动既是区内多金属成矿物质来源,也为矿床的形成提供了热液条件;S、Pb稳定同位素的研究,进一步指明了含矿热液来源的多源性;锆石U-Pb测年法测得,夼北铜矿床的形成年龄大致与伟德山期岩浆岩的成岩年龄相近,在116.6 Ma左右。该矿床为中生代接触交代(矽卡岩)型铜矿床。The eastern Wehai area,bordered by the Mishan Fault,is an important polymetallic mineralization zone in the Jiaodong region.It hosts a series of copper-molybdenum,lead-zinc,and gold-silver polymetallic mineral deposits related to the late Yanshanian Mesozoic intermediate-acidic intrusive magmatic activity.This study investigates the geochemical characteristics,metallogenic age,and ore genesis of the Kuangbei skarn-type copper deposit,a typical deposit in the area.Testing results of rare earth elements(REEs)and micro-elements suggest that the intrusive activities of Weideshan Period magmatic rocks provided both the metallogenic materials and the hydrothermal conditions essential for the deposit formation.Research on stable isotopes of S and Pb indicates a multi-source origin of the ore-bearing hydrothermal fluids.Zircon U-Pb dating reveals that the formation age of Kuangbei Copper Deposit,approximately 116.6 Ma,is close to the diagenetic age of Weideshan Period magmatic rocks.This deposit is a Mesozoic contact metasomatic(skarn)type copper deposit.

关 键 词：矽卡岩型 伟德山期岩浆岩 稀土元素 微量元素 稳定同位素 成矿时代 矿床成因 

分 类 号：TD11[矿业工程—矿山地质测量] R618.51[医药卫生—外科学]