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

The Zhaochuan Map-sheet (K50E020006) area is located in the eastern part ofZhangjiakou–Xuanhua region of Hebei province and the middle section of the northern marginof the North China craton. It is one of the important gold fields in China. The 1∶50 000mineral geological map database of the Zhaochuan Map-sheet was compiled in accordancewith the Technical Requirements of Solid Mineral Geological Survey (1∶50 000) (DD2019−02) and other applicable industrial standards. The survey work involves specificgeological mapping covering an area of 379.93 km2, measured geological routes totalingapproximately 315 km in length, ore spot checks and anomaly checks at about 15 points, threegroups of U–Pb ages (390–370 Ma, 234 Ma and 140–120 Ma), and six groups of whole-rockanalytical data. Through comprehensively analysing field measurement data of geologicalpoints, geological routes and geological boundaries, and previous regional geological surveyrecords, the boundaries of geological units were redelineated, and the corresponding featurelayers were established. Meanwile, the Meso–Neoarchean, Mesoproterozoic and Mesozoicstrata in the Zhaochuan Map-sheet were redivided, the Archean to Mesozoic magmatic rockswere generalized, the spatio-temporal evolution sequence of the magmatic rocks andmetallogenesis was determined, and a “three-in-one” ore prospecting prediction geologicalmodel and an integrated geological, geochemical, geophysical and remote-sensing oreprospecting prediction model were then established. The database has a high reference valuefor the deployment of mineral exploration activities in the area, and could also provide servicefor the local natural resource departments in the field of the land space planning and ecologicalcivilization.

赵川幅（K50E020006）研究区位于河北省张家口-宣化地区东部，华北克拉通北缘中段，是我国重要的金矿集区之一。赵川幅1∶5万矿产地质图数据库依据《固体矿产地质调查技术要求（1∶5万）》（DD2019−02）及其他相关行业标准编制完成。本次调查工作涵盖面积379.93平方千米的专项地质填图，实测地质路线总长约315千米，开展矿点检查与异常查证共计约15处，获取3组U-Pb年龄数据（390~370 Ma、234 Ma及140~120 Ma）以及6组全岩分析数据。通过综合分析地质点、地质路线及地质界线的实测数据与既往区域地质调查资料，重新厘定了地质单元界线，并构建了对应特征图层。与此同时，对赵川幅内中-新太古代、中元古代及中生代地层进行了重新划分，对太古宙至中生代岩浆岩进行了归并概括，明确了岩浆活动与成矿作用的时空演化序列，并建立了“三位一体”找矿预测地质模型以及地质-地球化学-地球物理-遥感综合找矿预测模型。该数据库对本区矿产勘查部署具有较高参考价值，同时可为当地自然资源部门开展国土空间规划与生态文明建设相关领域工作提供服务支撑。