中国地质调查局: 云南省马楠幅(H48E024007)1∶50 000地质图数据库

云南马楠幅（H48E024007）1∶50 000 地质图数据库是按《1∶50 000区域地质调查技术要求》（DD 2019—01）和地质行业的统一标准及要求，在综合分析前人资料、野外踏勘、剖面测制、野外路线调查的基础上开展，采用数字填图系统（DGSS）进行野外地质填图和数据库建设，并应用室内与野外填编图相结合的方法完成，加强了含矿地层、岩石、构造的调查，突出了岩性、构造填图和特殊地质体及非正式填图单元的表达。地质图面上突出了火山岩、非正式填图单元和特殊岩性的岩性花纹等信息的表达，从而丰富了地质图的内容，使得地质图面美观、地质信息直观，增强了地质图利用效果，综合体现了成果的可靠性、创新性及应用性。厘定了构造形态及构造变形特征；对区内滑坡、泥石流等地质灾害的资料进行了收集整理，总结了地质灾害的类型、发育规模及分布状况；详细调查了马楠云海和马楠云海之上的大草原。共划分出26个组级地层单位，并在此基础上划分出12个段级地层填图单位，在综合1∶200 000区域地质调查、邻区1∶50 000区域地质调查、岩石地层清理资料及野外试填图的基础上，提出了各填图单位的岩石组合特征。数据量约为169 MB，反映了1∶50 000 区域地质调查最新成果，为该区下一步开展矿产地质调查、地质灾害防治及生态环境保护等提供基础性资料。

The 1:50 000 geological map database of the Yunnan Mannan sheet (H48E024007) was developed in accordance with the *Technical Requirements for 1:50 000 Regional Geological Survey* (DD 2019—01) and unified standards and requirements of the geological industry. The work was carried out based on comprehensive analysis of previous data, field reconnaissance, section measurement and field route surveys. Field geological mapping and database construction were conducted using the Digital Geological Survey System (DGSS), and the project was completed by combining indoor and outdoor mapping and compilation methods. This study strengthened the survey of ore-bearing strata, rocks and structures, and emphasized the expression of lithology, structural mapping, special geological bodies and informal mapping units. The geological map highlights the expression of information such as lithologic patterns for volcanic rocks, informal mapping units and special lithologies, thus enriching the map content, making the geological map visually appealing and geological information intuitive, improving the utilization effect of the geological map, and comprehensively reflecting the reliability, innovation and applicability of the results. The structural morphology and tectonic deformation characteristics were defined. Data on geological disasters such as landslides and debris flows in the area were collected and sorted out, and the types, development scales and distribution of geological disasters were summarized. A detailed survey was conducted of the Mannan Sea of Clouds and the grassland above it. A total of 26 formation-level stratigraphic units were delineated, and on this basis, 12 member-level stratigraphic mapping units were divided. Based on the integration of 1:200 000 regional geological survey data, 1:50 000 regional geological survey data from adjacent areas, lithostratigraphic collation data and field trial mapping, the rock association characteristics of each mapping unit were proposed. With a data volume of approximately 169 MB, this database reflects the latest achievements of the 1:50 000 regional geological survey, and provides basic data for the subsequent mineral geological survey, geological disaster prevention and ecological environmental protection in this area.