鄂尔多斯盆地南缘黄陵地区煤铀兼探钻孔数据集成与三维地质模型构建

鄂尔多斯盆地南缘黄陵地区铀成矿前景良好。中国地质调查局在该地区组织实施了含铀岩系三维地质调查工作，以寻找可地浸砂岩型铀矿找矿靶区为目标，采用“煤铀兼探”、“油铀兼探”的新思路，对煤田钻孔资料进行“二次开发利用”，开展勘查选区研究，完成了354口煤田钻孔（其中筛选出潜在砂岩型铀矿（化）孔49口）和21口铀矿验证钻孔（其中工业矿（化）孔16口）的数据采集建库，在此基础上建立了专题成果图集及三维地质模型。该数据库主要由含铀岩系地层厚度等值线图、砂体厚度等值线图、顶底板埋深等值线图、含砂率等值线图、放射性异常等值线图等专题成果图集和三维地质结构模型组成，为铀矿勘探开发提供了有利支撑和服务作用。

Integration of Borehole Data and 3D Geological Modeling of the Huangling Area on the Southern Margin of the Ordos Basin Based on Coal-Uranium Joint Exploration

The Huangling area on the southern margin of the Ordos Basin boasts great potential for uranium mineralization. China Geological Survey has organized and implemented 3D geological survey of the uranium-bearing rock series in this area to seek prospecting target areas of in-situ leachable sandstone-hosted uranium deposits. During the survey, the data of the coalfield boreholes were developed and utilized again to determine exploration areas under the guidance of new ideas of joint coal-uranium explorations and joint petroleum-uranium explorations. As a result, the data of 354 coalfield boreholes (49 potential sandstone-hosted uranium ore boreholes) and 21 verified uranium ore boreholes (16 industrial uranium mineralization boreholes) were acquired and a database was created accordingly. Furthermore, a thematic result atlas and a 3D geologic model were established, which mainly constitute the database. The thematic result atlas includes the isoline maps of stratum thickness, sand body thickness, the burial depth of the roof and floor, sand content and radioactive anomalies of the uranium-bearing rock series. Therefore, the database will provide active support and service for the exploration and development of uranium deposits.