中国地质调查局: 辽宁省台吉幅(K51E014003)1∶50 000地质图数据库

辽宁台吉幅（K51E014003）1∶50 000地质图根据《1∶50 000区域地质调查技术要求》（DD 2019—01）和行业的其他统一标准及要求，充分利用1∶200 000区域地质、1∶250 000区域地质调查工作资料，采用数字地质调查系统（DGSS），进行野外地质填图和数据库建设。通过遥感解译、野外数字填图等手段采集数据，完成辽宁台吉幅1∶50 000地质填图385.2 km²，系统编制了辽宁台吉幅1∶50 000地质图、矿产图、建造构造图，并依据《数字地质图空间数据库标准》（DD 2006—06）建立了数据库。图件详细填绘了各地层单位的物质组成和构造组合特点，建立了测区岩石地层格架，分析了各地层层序特征并划分了沉积建造类型。本地质图数据库为MapGIS格式，包括18个沉积（火山）地层单位，数据量为267 MB，其中地质体面实体数据125个、路线长度649 km、地质点<number>1100</number>个、地质（界）线数据332条、293个产状数据、摄像（照片）数据403个，薄片66件，锆石U–Pb测年数据6件、光释光测年数据4件、岩石地球化学分析数据70件。该图幅建立了辽西中生代陆相地层格架，确定了各期火山岩的岩性、岩相、火山构造特征及其形成时代，恢复了古火山机构。反映了1∶50 000区域地质调查基础性成果，对中生代陆相地层对比研究具有重要的科学研究价值。本数据库建立过程始终坚持完善的质量控制体系，确保了数据的真实性、可靠性和准确性，对该区矿产地质调查、地质灾害防治及生态环境保护、工程施工等提供基础地质支撑。对区内地层进行了详细调查研究，查明了各地层单位的物质组成、地层层序、沉积环境、形成时代，系统地建立了测区岩石地层格架，详细划分为13个组，18个地层填图单位，1个侵入岩填图单位。通过分析岩石组合、地层层序特征，识别出碳酸盐岩建造、陆相火山沉积建造、复陆屑建造等3种沉积建造类型，进一步划分为10种沉积相。

The 1:50 000 geological map of the Liaoning Taiji sheet (K51E014003) was developed in compliance with the *Technical Requirements for 1:50 000 Regional Geological Survey* (DD 2019—01) and other industry-wide unified standards and requirements. It fully leveraged 1:200 000 and 1:250 000 regional geological survey data, and adopted the Digital Geological Survey System (DGSS) to carry out field geological mapping and database construction. Data were collected through remote sensing interpretation, field digital mapping and other means, with a completed 1:50 000 geological mapping area of 385.2 km² for the Liaoning Taiji sheet. The team systematically compiled the 1:50 000 geological map, mineral resource map, and tectonic map of the Liaoning Taiji sheet, and established a database in accordance with the *Standard for Spatial Database of Digital Geological Maps* (DD 2006—06).

The map elaborates on the material composition and structural assemblage features of each stratigraphic unit, established the lithostratigraphic framework of the survey area, analyzed the stratigraphic sequence characteristics of each layer, and classified sedimentary formation types. This geological map database is in MapGIS format, comprising 18 sedimentary (volcanic) stratigraphic units, with a total data volume of 267 MB, including 125 geological surface entity records, 649 km of survey routes, 1100 geological points, 332 geological boundary line records, 293 sets of occurrence data, 403 photographic data entries, 66 thin sections, 6 sets of zircon U-Pb dating data, 4 sets of optically stimulated luminescence (OSL) dating data, and 70 sets of lithogeochemical analysis data.

This map sheet established the Mesozoic continental stratigraphic framework of western Liaoning, determined the lithology, lithofacies, volcanic tectonic characteristics and formation ages of volcanic rocks at each stage, and restored the ancient volcanic edifices. It reflects the basic research outcomes of 1:50 000 regional geological surveys, and possesses important scientific research value for Mesozoic continental stratigraphic correlation studies.

The entire database construction process adhered to a rigorous quality control system, ensuring the authenticity, reliability and accuracy of the data, providing fundamental geological support for regional mineral geological surveys, geological hazard prevention and control, ecological environment protection, and engineering construction. Detailed investigations and studies were conducted on the strata in the area, clarifying the material composition, stratigraphic sequence, sedimentary environment and formation age of each stratigraphic unit, systematically establishing the lithostratigraphic framework of the survey area, which is subdivided into 13 formations, 18 stratigraphic mapping units, and 1 intrusive rock mapping unit. By analyzing rock assemblages and stratigraphic sequence characteristics, three sedimentary formation types were identified: carbonate formation, continental volcanic-sedimentary formation, and complex terrigenous clastic formation, which are further divided into 10 sedimentary facies.