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青海昆仑河地区黑海北金矿床地质特征及找矿前景

Geological characteristics and prospecting prospects of Heihaibei Gold Deposit in Kunlunhe Area,Qinghai Province

  • 摘要: 黑海北金矿床位于东昆仑南部(坳褶带/增生楔)Cu-Co-Au成矿亚带内。为确定该矿床地质特征,为探矿增储提供理论指导,通过开展大比例尺地质填图、槽探和钻探工程,查明了矿区及矿床地质特征,探讨了控矿因素、找矿标志和找矿前景。矿区矿体严格受构造控制,尤其以北西西构造为主要控矿因素;已发现矿(化)体均赋存于二长花岗岩内,印支期—燕山期岩浆岩为重要的控矿因素;矿化露头、构造破碎带、化探异常和围岩蚀变为重要找矿标志。该矿床成因类型为与断裂关系密切的岩浆热液型。综合分析认为,矿区成矿地质背景良好、找矿成果显著、深部成矿前景良好,加大勘查力度有望取得重大找矿突破。

     

    Abstract: Heihaibei Gold Deposit is located in Cu-Co-Au metallogenic subbelt in the south of East Kunlun(depression fold belt/accretionary wedge).In order to find out the geological characteristics to provide theoretical guidance for the exploration,the study carried out large-scale geological mapping,trough exploration and drilling projects in the area,investigated the geological characteristics of the district and the deposit,and discussed the ore-controlling factors,prospecting markers and prospecting prospects.The ore bodies in the district were strictly controlled by the structures,especially the NW structures,were the main ore-controlling factors;the ore(mineralization) bodies discovered occurred in monzogranites,and the Indochina-Yanshanian magmatic rocks were the important ore-controlling factors;mineralization outcrops,structural fracture zones,geochemical anomalies and wall rock alterations were all important prospecting markers.The genetic type of the deposit was a magmatic hydrothermal gold deposit closely related to fault structures.According to comprehensive analysis,it was expected to make a great breakthrough in prospecting by increasing exploration efforts because of the good metallogenic geological background,remarkable prospecting results,good deep metallogenic prospects.

     

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