中国地质调查局: 内蒙古五家户幅(L51E007011)1∶50 000地质图数据库

内蒙古五家户幅(L51E007011) 1∶50 000地质图是遵循《1∶50 000区域地质调查技术要求》(DD 2019—01)规范要求，采用造山带填图技术理论和方法，在充分利用1∶200 000及1∶250 000区调成果的基础上，结合物化遥资料，填制完成的重要成果图件。本次调查工作采用岩性+构造方式进行填图，详细刻画了5期侵入岩浆活动历史及成分变化特征，在早白垩世岩体划分和图面表达方式具有一定的引领和示范性；厘清了中生代火山岩的活动时序，查明了火山盆地的物质组成及充填序列；非正式填图单元中元古界宋两家子片岩(Pt₂<i>sl</i>)确立了大兴安岭中段存在古老的前寒武纪基底；非正式填图单元巨宝屯火山岩(C₁<i>jb</i>)矿化蚀变丰富，成矿条件优越，具有寻找斑岩型铜矿的潜力。图幅空间数据库数据内容包含2个非正式填图单位，7个正式填图单位、5期岩浆事件，以及78个岩石化学分析数据，17个锆石U–Pb年龄数据，数据量为140 MB。空间数据库全面记录了调查工作的基础数据，系统表达了本次调查的新成果新认识，资料准确详实，信息丰富，检索方便快捷，可为国土空间规划、矿产勘探及基础地质研究等提供基础地质资料。

The 1:50,000 geological map of the Wujiahu sheet (L51E007011), Inner Mongolia, is an important cartographic product compiled in compliance with the *Technical Requirements for 1:50,000 Regional Geological Survey* (DD 2019—01). It applies the theories and methodologies of orogenic belt mapping, and was developed based on full utilization of existing 1:200,000 and 1:250,000 regional geological survey results, combined with geophysical, geochemical and remote sensing data. The present survey adopted a lithology + structure mapping framework, comprehensively documenting the 5-stage intrusive magmatic evolutionary history and compositional variation characteristics. The division of Early Cretaceous rock bodies and the cartographic representation thereof hold certain leading and demonstrative value. This work clarified the activity chronology of Mesozoic volcanic rocks, and ascertained the material composition and filling sequence of volcanic basins. The informal mapping unit of Songliangzizi Schist (Pt₂*sl*, Mesoproterozoic) confirmed the presence of ancient Precambrian basement in the central Daxing'an Mountains. Another informal mapping unit, the Jubaotun Volcanic Rocks (C₁*jb*), features abundant mineralization and alteration, favorable metallogenic conditions, and significant potential for porphyry copper deposit exploration. The spatial database of this map sheet encompasses 2 informal mapping units, 7 formal mapping units, 5 magmatic events, 78 petrochemical analysis datasets, and 17 zircon U-Pb age datasets, with a total data volume of 140 MB. This spatial database comprehensively records the fundamental survey data, systematically expresses the new findings and understandings of this survey, with accurate and detailed materials, rich information, and convenient and efficient retrieval. It can provide foundational geological data for territorial spatial planning, mineral exploration, basic geological research and other relevant fields.