甘肃省花牛山幅1:50 000矿产地质图数据库

甘肃省花牛山幅（K46E017023）1：50 000矿产地质图是根据《矿产地质调查技术要求（1：50 000）》和行业的统一标准及要求，在充分利用1：200 000、1：50 000等区域地质调查工作成果资料的基础上，采用数字填图系统进行野外地质专项填图，并应用室内与室外填编图相结合的方法完成的。本图对南华系-震旦系洗肠井群、寒武系西双鹰山组、奥陶系花牛山群的建造类型进行了重新划分，把图幅内侵入岩时代归纳为晚奥陶世—早志留世、泥盆纪、晚三叠世等3期，建立了岩浆岩的演化序列。本数据库包含12个地层单位和3期岩浆岩资料，数据量约为3.77 MB。这些数据充分反映了1：50 000矿产地质调查示范性成果，对该区矿产资源研究、能源勘探等具参考意义。

1:50 000 Mineral Geological Map Database of the Huaniushan Map-sheet, Gansu

The 1:50 000 mineral geological map of the Huaniushan map-sheet (K46E017023), Gansu province, is developed in accordance with the Technical Specification for Mineral Geological Survey (1:50 000) and unified standards and requirements in the sector, building on making full use of results from and information of 1:200 000 and 1:50 000, etc. regional geological survey, applying the digital mapping system to plot geology-specific maps in the field and adopting the method integrating indoor and outdoor mapping and compilation. In this map, the formation type of the Nanhua-system-Sinian-system Xichangjing Group, Cambrian-system Xishuangyinshan Formation and Ordovician-system Huaniushan Group is reclassified, the periods of intrusive rocks in the map sheet are included in three periods, i.e. late Ordovician epoch-early Silurian epoch, Devonian period and late Triassic epoch, and the evolutionary sequence of magmatite. The database contains data and information of 12 stratigraphic units and magmatite of three periods, with a data size about 3.77 MB. These data fully reflect demonstrative results from the 1:50 000 mineral geological survey, provide a reference to mineral resource research and energy exploration in the area.