Requirements of Map Compilation and Database Building of 1∶50 000 Mineral Geological Maps

1∶50 000 solid mineral geological surveys are long-term basic, public-spirited, and strategic geological work that guarantee national energy and resource security. They serve as both an important foundation and forerunner of mineral exploration and an important index of national geological surveys and earth system science research. Their purpose is to ascertain national mineral reserves, achieve significant breakthroughs in prospecting or make new discoveries, and guide and drive subsequent mineral exploration. Meanwhile, they play an important role in serving major strategies, social development, and ecological civilization construction. In 2019, the China Geological Survey officially issued the Technical Requirement of 1∶50 000 Solid Mineral Geological Survey (DD 2019-02), creating a new mineral geological survey method by mapping (compiling) suite-tectonic maps according to mineralization types and taking mineralization types as the thread, metallogenic factors as the objects, pre-research as the base, and mineral and geology-specific mapping as the core. Meanwhile, a mineral resources potential evaluation technical system and a "trinity" assessment system were also established. The former is based on the comprehensive geological information prediction of deposit models and the later integrates the assessment of geological potential, technical and economic feasibility, and environmental impact. All these guide solid mineral geological surveys and the expression of survey results and provide technical support for solid mineral exploration. Among them, the 1∶50 000 mineral geological maps serve as the core result maps of solid mineral geological surveys. This paper focuses on a brief description of the requirements of map compilation and database building of 1∶50 000 mineral geological maps based on the Technical Requirement of 1∶50 000 Solid Mineral Geological Survey (DD 2019-02).