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
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摘要:
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。
Abstract: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.
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图 1 鄂尔多斯盆地南缘黄陵地区大地构造位置(a, 构造区划据杨俊杰和裴锡古, 1996)及钻孔分布图(b, 底图据陕西省1∶50万数字地质图数据库A)
图 2 钻孔属性采集数据表逻辑结构图(修改自周小希等,2016)
表 1 数据库(集)元数据简表
条目 描述 数据库(集)名称 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 数据库(集)作者 张 云,中国地质调查局天津地质调查中心
张天福,中国地质调查局天津地质调查中心
孙立新,中国地质调查局天津地质调查中心数据时间范围 2017—2018年 地理区域 108.7648°~109.1581°E,35.5163°~35.8410°N;1 225 km2 数据格式 图集格式为MapGIS (*.wp,*.wl,*.wt),三维地质模型数据集格式为*.txt 数据量 515 Ma 数据服务网址 http://dcc.cgs.gov.cn 基金项目 国家重点研发计划(2018YFC0604200)、国家重点基础研究发展计划(973计划2015CB453000)、国际地球科学计划(IGCP675)项目资助、中国地质调查局地质调查项目(DD20190813) 语种 中文 数据库(集)组成 该数据集主要由含铀岩系直罗组地层厚度等值线图、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以及含铀岩系直罗组三维地质模型组成 Table 1. Metadata Table of Database (Dataset)
Items Description Database (dataset) name Integration of Borehole Data and 3D Geological Modeling of the Huangling Area on the Southern Margin of the Ordos Basin Based on joint Coal-Uranium Explorations Database (dataset) authors Zhang Yun, Tianjin Center, China Geological Survey
Zhang Tianfu, Tianjin Center, China Geological Survey
Sun Lixin, Tianjin Center, China Geological SurveyData acquisition time 2017–2018 Geographic area 108.7648°–109.1581° E, 35.5163°–35.8410° N; 1225 km2 Data formats MapGIS (*.wp, *.wl, *.wt) for the atlas, and *.txt for the 3D geologic model dataset Data size 515 MB Data service system URL http://dcc.cgs.gov.cn Fund projects Jointly funded by the National Key R&D Program of China (2018YFC0604200), the National Key Basic Research Program of China (973 Program; 2015CB453000), the International Geoscience Program (IGCP675) and a project initiated by China Geological Survey (DD20190813) Language Chinese Database (dataset) composition This dataset mainly consists of a thematic result atlas and a 3D geologic model of Zhiluo Formation as the uranium-bearing rock series. The thematic result atlas includes the isoline maps of stratum thickness, sand-body thickness, burial depth of the roof and floor, sand content and radioactive anomalies. -
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