The Research On Structural Characteristics And Mineralization Of Yangshan Gold Belt, In Gansu

In this paper, Relying on the 1:10000 regional geological survey projects in Gansu Yangshan and the research on deep structural control laws of Yangshan Gold Belt, in Gansu Province, I select "The Research on Structural Characteristics and Mineralization of Yangshan Gold Belt, in Gansu" as the title. Yangshan Gold Belt belongs to the South West Qinling belt, located in mainland China Yangtze plate-the North China Plate-Songpan-Ganzi block transform parts of the three blocks together, in a very complex tectonic environment. Based on Field research, drilling in the field catalog, and a large number of thin sections, combined with laboratory identification, I use the thought of structural analysis to study the structure and mineralization of the Yangshan gold deposit. Thesis has significance for mineral exploration and regional prospecting. Achieve new knowledge and progress, as follows:(1) The area develops a regional shallow metamorphic rock, the rocks show many of deformation and metamorphism, macroeconomic management has clear tectonic surface displacement characteristics, the structural deformation structure under the central level, and the overall performance of the ground north South thrust characteristics. (2) Pyrite could be divided into three types by crystal:fine grained infection, semi-shaped particles from the collection and large particles from the single crystal form. Pyrite is distributed in phyllite, granodiorite, and quartz veins. (3) According to the characteristics of granite porphyry, fine ore and fracture filling pyrite-related; quartz veins also see a clear payment. (4) Quartz veins have four types. The third type of quartz veins are closely related to the formation of gold deposit. Metallogenic epoch is the Late Triassic-Early Jurassic (210Ma-160Ma). Keywords:structure, gold deposit, pyrite, quartz vein...