胶东郭城地区金矿床地质及地球化学特征  

Geological and geochemical characteristics of gold deposits in the Guocheng Region,Jiaodong

作　　者：张鹏鹏 李俊建[1] 田杰鹏 唐文龙[1] 党智财 付超[1] 何江涛 Zhang Pengpeng;Li Junjian;Tian Jiepeng;Tang Wenlong;Dang Zhicai;Fu Chao;He Jiangtao(Tianjin Geological Survey Center,China Geological Survey;Sinosteel Tianjin Geological Academy Co. ,Ltd.;China University of Geosciences (Beijing))

机构地区：[1]中国地质调查局天津地质调查中心 [2]中钢集团天津地质研究院有限公司 [3]中国地质大学(北京)

出　　处：《黄金》2018年第3期7-14,共8页Gold

基　　金：国家重点研发计划项目(2016YFC0600107);中国地质调查局地质调查项目(1212010561510;DD20160044;DD20160112)

摘　　要：郭城地区金矿床位于胶莱盆地东北缘,是牟平—即墨成矿带的重要组成部分。通过对胶东郭城地区典型金矿床地质及地球化学特征的归纳总结,得出郭城地区金矿床的硫主要为胶莱盆地基底硫与地幔硫相混合而成,荆山群地层也可能在成矿热液运移过程中萃取了部分硫源;铅同位素组成表明,郭城地区金矿床的铅同位素比较均一,成矿物质主要来源于上地幔,并混入了少量壳源铅;氢氧同位素组成表明,郭城地区金矿床的成矿热液以原生岩浆水为主,且有部分大气水的加入。结合郭城地区金矿床的成矿年龄110~119 Ma,认为该区是处于中生代构造转折期的燕山期大规模成矿期,属于岩石圈减薄构造条件下的产物。The gold deposit in the Guocheng Region is located in the northeastern margin of the Jiaolai Basin,and it is an important part of the Muping-Jimo metallogenic belt.The paper summarized the geological and geochemical characteristics of typical gold deposits in the Guocheng region,Jiaodong,arrived that the sulfur source of the Guocheng gold deposits mainly derived from the mixing of the basement sulfur and mantle sulfur in Jiaolai basin,besides,the Jingshan group strata may also extract partial sulfur source during hydrothermal fluid migration;Radioactive lead isotopes indicate the lead isotopic compositions of gold deposits in the Guocheng Region are relatively homogeneous,the ore-forming materials mainly derived from the upper mantle and mixed with a small amount of lead from the crust;Hydrogen and oxygen isotopes indicate that ore-forming hydrothermal fluids of gold deposits primarily derived from magmatic water and partly from meteoric water.Based on the metallogenic age of Guocheng gold deposits110-119Ma,the paper considered that this region belongs to a large-scale Yanshan metallogenic epoch during the Mesozoic tectonic transition period,and belongs to the product of lithospheric thinning.

关 键 词：金矿床 同位素 地质特征 地球化学特征 郭城地区 胶东 

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