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    甘肃崖湾—大桥整装勘查区石峡幅1∶50 000矿产地质调查成果数据库

    Database of 1∶50 000 Mineral Geological Survey Results of the Shixia Map-sheet in Yawan–Daqiao Integrated Exploration Area, Gansu Province

    • 摘要: 甘肃石峡幅(I48E014014)1∶50 000矿产地质调查按照中国地质调查局《固体矿产地质调查技术要求(1∶50 000)》(DD2019-02), 在系统收集和综合分析已有地质、物探、化探、遥感、矿产等资料基础上, 采用数字填图技术, 开展石峡幅1∶50 000矿产地质专项填图、综合检查、找矿预测和圈定找矿靶区。专项地质填图采用填编结合的方式, 将图幅地层划分为19类非正式沉积建造类型, 划分侵入岩建造类型1个;结合重点工作区矿产综合检查, 填写矿产信息卡片。在此基础上开展典型矿床研究, 总结成矿要素, 完成1∶50 000矿产地质图、成矿规律图、矿产预测图等成果图件编制和数据库建设。成果图件和数据库突出表达了成矿建造、区域构造、矿化蚀变信息;系统总结了石峡幅成矿要素信息, 建立了典型矿床成矿模型;圈定了7处中低温热液型金矿找矿预测靶区。

       

      Abstract: The 1∶50 000 mineral geological survey of Shixia Map-sheet (I48E014014) in Gansu Province was conducted according to the Technical Requirements of Solid Mineral Geological Survey (1∶50 000) (DD2019−02) issued by the China Geological Survey. During this survey, the digital mapping technique was employed to carry out 1∶50 000 mineral geology-specific mapping, comprehensive mineral inspection, and prospecting prediction and to delineate prospecting target areas based on the systematical collection and comprehensive analysis of existing geological, geophysical, geochemical, remote sensing, and mineral data. The geology-specific mapping was completed by field mapping and indoor map compilation. As a result, the Shixia Map-sheet was divided into 19 types of informal sedimentary suites and one type of intrusive rock suites. Meanwhile, the mineral information cards were filled in combination with comprehensive mineral inspection of major survey sites in the Map-sheet area. On these bases, typical deposits in the Map-sheet area were researched and metallogenic factors were summarized. Moreover, the result maps such as 1∶50 000 mineral geological map, metallogenic regularity maps, and mineral prediction maps were prepared, and a database of these maps was developed. In the result maps and database, metallogenic suites, regional structures, and mineralized alteration are highlighted, metallogenic factors in the Shixia Map-sheet are systemically summarized, the metallogenic models of typical deposits are established, and seven prospecting and prediction targets of medium-low temperature hydrothermal gold deposits was delineated.

       

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