河南银洞坡金矿“三位一体”找矿预测地质模型及应用示范  

The“trinity”prospecting prediction geological model and application demonstration of Yindongpo gold deposit in Henan Province

作　　者：唐相伟[1] 张晓飞 杨泽强[1] 郭跃闪 王海生[1] 李积山 TANG Xiangwei;ZHANG Xiaofei;YANG Zeqiang;GUO Yueshan;WANG Haisheng;LI Jishan(Third Institute of Geological and Mineral Exploration,Bureau of Geology and Mineral Exploration and Development of Henan Province,Zhengzhou 450000,Henan,China;Development and Research Centre,China Geological Survey,Beijing 100037,China)

机构地区：[1]河南省地质矿产勘查开发局第三地质矿产调查院,河南郑州450000 [2]中国地质调查局发展研究中心,北京100037

出　　处：《地质通报》2024年第7期1120-1132,共13页Geological Bulletin of China

基　　金：国家重点研发计划项目《脉状金系统的综合找矿技术与增储示范》(编号:2022YFC2903605);中国地质调查局项目《矿集区矿产调查及深部找矿预测》(编号:DD20190570-2020-02);河南省财政地质勘查项目《河南省桐柏县围山城金银矿深部及外围普查》。

摘　　要：河南银洞坡金矿位于河南省桐柏县朱庄镇,为一特大型金矿床,同体共生银、铅锌。运用勘查区找矿预测方法与理论,构建成矿地质体、成矿构造与成矿结构面和成矿作用特征标志为主的“三位一体”找矿预测地质模型。野外调查和矿床学研究认为,矿床成因为与早白垩世岩浆作用有关的中低温岩浆热液矿床,主成矿阶段温度介于200~350℃之间,碳、氢、氧、硫同位素研究表明,成矿物质和成矿流体主要来源于岩浆。确定成矿地质体为矿区深部隐伏早白垩世花岗岩体;成矿结构面为岩性界面(硅/钙面)、褶皱成矿构造系统结构面、沉积成岩结构面;成矿作用特征标志主要为矽卡岩化、钾化、黄铁绢英岩化、硅化、铁白云石化、萤石矿化、碳酸盐化。由此建立了银洞坡金矿找矿预测地质模型,圈定了找矿靶区,施工的钻孔见矿率达到85%,对该地区及邻区进一步找矿具有现实的指导意义。The Yindongpo gold deposit is a super large gold deposit located in Zhuzhuang Town,Tongbai County,Henan Province,associated with silver,lead and zinc.This paper applies the prospecting prediction methods and theories in the exploration area to construct a"trinity"geological model for prospecting prediction,which focuses on the ore-forming geological body,ore-forming structure,ore-forming structural plane,and the characteristic markers of mineralization.Based on field investigation and mineral deposit study,the Yindongpo deposit has been suggested as middle-low temperature(200~350℃)magmatic-hydrothermal deposit,related to magmatic activities at Early Cretaceous.C-H-O-S isotopes indicate that ore-forming materials and fluids mainly originated from magmas.The metallogenic geological body is determined as concealed Early Cretaceous pluton in deep part of the Yindongpo deposit.Metallogenic structural plane is lithologic interface(silicon/calcium interface),structural plane of fold metallogenic tectonic system,structural plane of sedimentary diagenesis.Mineralization indicators are skarn,potassic alteration,beresitization,silicification,iron dolomitization,fluorite,and carbonation.Ore prediction model has been established,defining prospecting area,and 85%drill hole witnessed mineralization,achieving exploration breakthrough.The work has been meaningful in guiding to next ore exploration step.

关 键 词：找矿突破 找矿预测模型 成矿地质体 成矿结构面 成矿作用特征标志 银洞坡金矿 矿产勘查工程 

分 类 号：P612[天文地球—矿床学] P618.51[天文地球—地质学]