中国地质调查局：青海省沟里混杂岩专题地质图数据库

青海省都兰县沟里混杂岩1:50000专题地质图是按照《1∶50000 区域地质调查技术要求》（DD2019−01），以《混杂岩地质调查与填图方法》为指导，采用数字化填图系统（DGSS）完成专题地质填图和数据库建设。该图幅数据库为MAPGIS格式，数据量约为140MB。该图对沟里地区古生代地层进行了重新厘定，共划分了岩性组级地层单位13个，1个非正式填图单位以及10期岩浆事件，重点突出了寒武-奥陶纪纳赤台岩群和长石山蛇绿混杂岩。在整理分析前人资料、野外路线调查、剖面测制的基础上，结合室内综合研究，查明了纳赤台岩群的组成、结构和时代，确定了长石山蛇绿混杂岩的岩块类型、基质组成及形成时代。该图系统展示沟里地区寒武-奥陶纪增生杂岩、蛇绿岩以及弧花岗岩的时空展布特征，为探讨东昆仑东段原特提斯洋演化，重建早古生代造山过程提供了详实的基础地质数据。

The 1:50000 thematic geological map of the Gouli mélange in Dulan County, Qinghai Province was completed through thematic geological mapping and database construction using the Digital Geological Mapping System (DGSS), in accordance with the *Technical Requirements for 1:50000 Regional Geological Survey* (DD2019−01) and the *Methods for Geological Survey and Mapping of Mélanges*. The database of this map sheet is stored in MAPGIS format, with a total data volume of approximately 140 MB.

This map redefines the Paleozoic stratigraphy in the Gouli area, identifying 13 lithostratigraphic units at the formation level, 1 informal mapping unit, and 10 magmatic events, with special emphasis on the Cambrian-Ordovician Nanchitai Rock Group and Changshishan ophiolitic mélange. Based on the collation and analysis of prior geological data, field traversing surveys, and section logging, combined with integrated indoor laboratory research, this work has clarified the composition, structure, and age of the Nanchitai Rock Group, and confirmed the block types, matrix composition, and formation age of the Changshishan ophiolitic mélange.

This map systematically exhibits the spatial-temporal distribution characteristics of Cambrian-Ordovician accretionary complexes, ophiolites, and arc granitoids in the Gouli area, providing detailed fundamental geological data for exploring the evolution of the Proto-Tethys Ocean in the eastern segment of the East Kunlun Mountains and reconstructing the Early Paleozoic orogenic process.