甘肃早子沟金矿“三位一体”找矿预测地质模型的构建  

Construction of the Geological Model of“Trinity”Prospecting Prediction in Zaozigou Gold Deposit,Gansu Province

作　　者：李康宁 李鸿睿 贾儒雅[2] 严康 李鹏兵 王涛[3] 韦乐乐[4] LI Kang-ning;LI Hong-rui;JIA Ru-ya;YAN Kang;LI Peng-bing;WANG-Tao;WEI Le-le(Third Institute Geological and Mineral Exploration,Gansu Provincia l Bureau of Geology and Mineral Resources,Lanzhou 730050;Development and Research Center,China Geological Survey,Beijing 100037;School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083;Shaanxi Institute of International Trade Jewelry Institute/Shannxi Province Gemmoiogical Teaching Demonstration Center,Xi’an 712000)

机构地区：[1]甘肃省地质矿产勘查开发局第三地质矿产勘查院,兰州730050 [2]中国地质调查局发展研究中心,北京100037 [3]中国地质大学(北京),地球科学与资源学院,北京100083 [4]陕西国际商贸学院珠宝学院,陕西省宝石教学示范中心,西安712000

出　　处：《矿产勘查》2019年第6期1397-1408,共12页Mineral Exploration

基　　金：国家重点研发计划(2017YFC0601505);中国地质调查局项目(121201004000160901)资助

摘　　要：本文在勘查区找矿预测理论的指导下,系统归纳总结了早子沟金矿的成矿地质体、成矿构造与成矿结构面、成矿作用特征标志,构建了"三位一体"找矿预测地质模型:早子沟金矿成矿地质体为215~230Ma侵入的规模较大的中酸性隐伏侵入体;成矿构造为NE向、近SN向、NW向断裂,成矿结构面为断裂构造与侵入接触结构面;蚀变、矿化具有分带性,以硅化、黄铁矿化、毒砂化、辉锑矿化为主,金均以自然金形式产出,成色较高,成矿热液主要来自于岩浆期后热液,成矿流体为具有中低温、低盐度和低密度特点的Na ClH2O体系。Guided by the theory of prospecting and prediction in the exploration area of Mr.Ye Tianzhu,this paper systematically summarizes the ore-forming geological bodies,ore-forming structures and ore-forming structural planes of the Zaozigou gold deposit,as well as the characteristics of mineralization.The geological model of"trinity"prospecting and prediction is constructed:the ore-forming geological body of Zaizigou gold deposit is a large intermediate-acid concealed intrusive body with 215~230 Ma,and the ore-forming structure is NE trending,near SN trending to NW-trending fault.The ore-forming structure plane is faulted structure and intrusive contact structure plane,the alteration and mineralization are zonation,mainly pyrite,arsenopyrite,stibnization,and gold are all produced in the form of natural gold,with high color and metallogenic heat.The fluid is mainly derived from magma,and the oreforming fluid is a Na Cl-H2 O system with the characteristics of moderate and low temperature,low salinity and low density.

关 键 词：早子沟金矿 三位一体 地质模型 

分 类 号：P611[天文地球—矿床学] P612[天文地球—地质学]