中国地质调查局: 甘新交界黑山梁幅(K46E015018)1∶50 000地质图数据库

甘新交界黑山梁幅（K46E015018）1∶50 000地质图数据库是在充分收集前人调查研究成果，吸取中澳合作填图和中加合作填图经验基础上开展区域地质调查工作的结果。调查路线的设计部署以垂直构造线的穿越路线为主、追索路线为辅，不着重强调路线密度，以最大限度收集野外第一手资料为目的，达到精细刻画地质体的目标，最终形成地质图数据集，数据量约为166 MB。本次调查将多种遥感影像资料充分应用到路线地质调查过程中，在中天山原划前寒武纪地质体中解体并厘定出前寒武纪变质沉积岩、新元古代闪长质片麻岩以及早古生代弧岩浆岩组合，对其展布范围和时代进行了约束；详细填绘了中天山南缘构造混杂岩的组成和变形特征；精细刻画了红柳河一带中天山及其南缘构造带的物质组成和结构构造。图幅的表达尽量实现地质体的展布、属性和演化特征的多层次表达，达到了客观性与认识性的统一，实现了构造—岩性实体填图。本数据集的形成为讨论中亚造山带南缘的构造演化以及东天山和北山的构造衔接关系提供野外地质证据。数据集的形成过程和表达形式对于后续地质调查工作具有参考和借鉴意义。

The 1:50,000 geological map database of the Heishanliang sheet (K46E015018) at the border between Gansu and Xinjiang was developed through regional geological survey work, based on full collection of previous survey and research results and lessons learned from China-Australia and China-Canada cooperative geological mapping projects. The survey route design prioritizes traversing routes perpendicular to structural lines, supplemented by tracing routes, without overemphasizing route density. The core goal was to collect the maximum amount of first-hand field data and accurately characterize geological bodies, ultimately forming the geological map dataset with a total data volume of approximately 166 MB. This survey fully applied multiple remote sensing image datasets to route geological survey work. In the previously mapped Precambrian geological bodies of the Central Tianshan, it disintegrated and formally identified the Precambrian metamorphic sedimentary rocks, Neoproterozoic dioritic gneisses, and Early Paleozoic arc magmatic rock assemblages, and constrained their distribution ranges and ages; it detailed the composition and deformation characteristics of the southern Central Tianshan tectonic melange, and accurately characterized the material composition and structural framework of the Central Tianshan and its southern margin tectonic belt in the Hongliuhe area. The map sheet expression achieves multi-level presentation of the distribution, attributes and evolutionary characteristics of geological bodies as much as possible, achieving the unity of objectivity and scientific understanding, and realizing tectono-lithologic entity mapping. The establishment of this dataset provides field geological evidence for discussing the tectonic evolution of the southern margin of the Central Asian Orogenic Belt and the tectonic connection relationship between the Eastern Tianshan and Beishan regions. The formation process and expression form of the dataset have reference and guiding significance for subsequent geological survey work.