中国地质调查局:湖北省蕲春地区(H50E011006,H50E011007,H50E012006和H50E012007图幅之内)1∶50000地质图数据库

湖北省蕲春地区(H50E011006,H50E011007,H50E012006和H50E012007图幅之内) 1∶50000专题地质图数据库是按《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，在充分收集和利用1∶200 000、1∶250 000和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（DGSS）进行野外地质填图和数据库建设，并应用室内分析与野外填图相结合的方法完成的。通过本数据库的建设，基本查明蕲春混杂岩带的物质组成、形成时代和结构构造特征，划分出次级大地构造单元，建立了综合地质事件表，初步探讨了区域地质构造演化史。本数据库包含8个（构造）沉积地层单元、15个俯冲增生杂岩带构造岩石单元和17个侵入岩单元。该数据库充分反映了大别造山带南缘蕲春地区1∶50 000专题地质调查的最新成果，为深入理解扬子陆块北缘前寒武纪基底形成和洋陆聚散演化提供了直接证据，是突破解决区域关键地质问题的最有效方式。

The 1:50000 thematic geological map database of the Qichun area, Hubei Province (within map sheets H50E011006, H50E011007, H50E012006 and H50E012007) was constructed 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. It was developed based on the comprehensive collection and utilization of existing regional geological survey results including 1:200 000, 1:250 000 and 1:50 000 scale surveys, using the Digital Geological Survey System (DGSS) for field geological mapping and database construction, and integrating indoor analysis with field mapping methods. Through the construction of this database, the material composition, formation age, structural and tectonic characteristics of the Qichun mélange zone have been basically clarified, secondary tectonic units have been delineated, a comprehensive geological event table has been established, and the regional tectonic evolution history has been preliminarily discussed. This database includes 8 (tectonic) sedimentary stratigraphic units, 15 tectonic rock units of the subduction-accretion complex zone, and 17 intrusive rock units. It fully reflects the latest achievements of the 1:50 000 thematic geological survey in the Qichun area on the southern margin of the Dabie orogenic belt, provides direct evidence for in-depth understanding of the formation of the Precambrian basement and the ocean-continent convergence and dispersal evolution on the northern margin of the Yangtze Block, and represents the most effective approach to addressing key regional geological issues.