内蒙古北柳图庙幅1:50000地质图数据库

1:50000 Geological Map Database of Beiliutumiao Map-sheet, Inner Mongolia

内蒙古北柳图庙幅(K49E011021)1:50000地质图根据《区域地质调查技术要求(1:50000)》(DD 2019–01)和行业的其他统一标准及要求,充分利用1:200000区域地质、1:50000矿产调查工作资料,采用数字地质调查系统(DGSS),结合Spot、ETM、Aster等多种遥感影像对构造及岩性边界不断验证和完善,最终绘制成图,是内蒙古温都尔庙-白乃庙地区具有重要参考意义的成果图件之一。图件详细填绘了白乃庙岛弧带的物质组成和构造组合特点,对志留系、二叠系、白垩系等沉积建造类型进行了重新划分,把区内侵入岩划分为4个期次,并构建了相对完善的构造演化序列。图幅数据库的数据内容包含有3个非正式填图单位、10个正式地层单位、4期岩浆事件和2期构造变形,以及176个样品的岩石全分析数据,10个样品的锆石U–Pb年龄数据,数据量为28.9 MB。该图幅细化了北侧温都尔庙构造带向南侧俯冲过程形成的白乃庙岛弧带的构造、岩浆演化过程,反映了1:50000区域地质调查最新示范性成果,对温都尔庙造山带古生代构造演化具有重要的科学研究价值,对后续该区域的地质调查工作也具有参考和借鉴意义。该图幅为中国地质调查局第一幅开展智能化区域地质调查填图的试点图幅,首次实现了中国区域地质调查工作的全流程智能化野外调查。

According to the’Technical Requirement for Regional Geological Survey(1:50000)’(DD 2019–01)and other uniform standards and requirements,and making full use of the data for 1:200000 regional geological and 1:50000 mineral survey,the 1:50000 Geological Map of Beiliutumiao Map-sheet(K49E011021),Inner Mongolia was compiled by adopting the Digital Geological Survey System(DGSS)in combination with Spot,ETM,Aster and other remote sensing images to continuously verify and modify tectonic and lithologic boundaries.As an achievement with important value of reference in the WenduermiaoBainaimiao area of Inner Mongolia,the map provides detailed information on the rock composition and tectonic association of the Bainaimiao island-arc belt.We re-divide sedimentary formation into different types,i.e.,Silurian,Permian,Cretaceous,and classify intrusive rocks in the region into four phases,establishing a relatively complete tectonic evolutionary series.The map database includes three informal mapping units,10 formal stratigraphic units,four periods of magmatic events and two tectonic deformations,as well as the whole rock analysis of 176 samples,and zircon U–Pb ages of 10 samples,with a data size of 28.9 MB.The map details the tectonic and magmatic evolution process of the Bainaimiao subduction belt formed in the southward subduction of the Wenduermiao tectonic belt in the north.Reflecting the latest results of the 1:50000 regional geological survey,the database holds important scientific value regarding the Paleozoic tectonic evolution of the Wenduermiao orogenic belt.It may also serve as an important reference for subsequent geological surveys in the region.As the first pilot map of China Geological Survey to apply comprehensive regional geological survey mapping,the present project represents the first time to realize whole-process field investigation in China’s regional geological surveys.