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    河北省张家口地区赵川幅1∶50 000矿产地质图数据库

    1∶50 000 Mineral Geological Map Database of the Zhaochuan Map-sheet in Zhangjiakou area, Hebei Province

    • 摘要: 赵川幅 (K50E020006)位于河北省张家口—宣化地区东部, 华北克拉通北缘中段, 是中国重要的金矿产地之一。赵川幅1∶50 000矿产地质图数据库根据《固体矿产地质调查技术要求(1∶50 000)》(DD 2019–02)和行业其他规范要求进行系统编制, 完成专项地质填图379.93 km2、实测地质路线长度约351 km、矿点检查及异常检查约15处、U–Pb年龄样品数据3组(390~370 Ma、~234 Ma和140~120 Ma)和岩石全分析样品数据6组。本数据库在野外实测的地质点、地质路线、地质界线数据和收集的以往区域地质调查资料进行综合整理的基础上, 重新确定地质单元界线, 建立相应的要素图层, 对赵川幅中—新太古代、中元古代及中生代的地层进行重新划分, 对太古宙至中生代的岩浆岩进行归纳, 厘定了岩浆岩和成矿的时空演化序列, 建立了“三位一体”找矿预测地质模型及地、物、化、遥综合找矿预测模型。该数据库对区内矿产勘查部署具有重要的参考价值, 还可以为当地自然资源部门的国土空间规划和生态文明建设提供服务。

       

      Abstract: The Zhaochuan Map-sheet (K50E020006) area is located in the eastern part of Zhangjiakou–Xuanhua region of Hebei province and the middle section of the northern margin of the North China craton. It is one of the important gold fields in China. The 1∶50 000 mineral geological map database of the Zhaochuan Map-sheet was compiled in accordance with the Technical Requirements of Solid Mineral Geological Survey (1∶50 000) (DD 2019−02) and other applicable industrial standards. The survey work involves specific geological mapping covering an area of 379.93 km2, measured geological routes totaling approximately 315 km in length, ore spot checks and anomaly checks at about 15 points, three groups of U–Pb ages (390–370 Ma, 234 Ma and 140–120 Ma), and six groups of whole-rock analytical data. Through comprehensively analysing field measurement data of geological points, geological routes and geological boundaries, and previous regional geological survey records, the boundaries of geological units were redelineated, and the corresponding feature layers were established. Meanwile, the Meso–Neoarchean, Mesoproterozoic and Mesozoic strata in the Zhaochuan Map-sheet were redivided, the Archean to Mesozoic magmatic rocks were generalized, the spatio-temporal evolution sequence of the magmatic rocks and metallogenesis was determined, and a “three-in-one” ore prospecting prediction geological model and an integrated geological, geochemical, geophysical and remote-sensing ore prospecting prediction model were then established. The database has a high reference value for the deployment of mineral exploration activities in the area, and could also provide service for the local natural resource departments in the field of the land space planning and ecological civilization.

       

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