Study On The Tectonic Deformation Characteristics And Ore-controlling Regularity Of The Liwu Copper Polymetallic Deposit

The geographical location of the study area is located on the northwest side of the Yangze platform,the Muli-Jinping Mountain arcshaped structure.Regional tectonic movement is strong,metallogenic conditions are superior,rich in mineral resources,mineralization and mineral structure closely related.Based on the study of the tectonic types and tectonic ore-controlling characteristics of the study area,the tectonic deformation characteristics and the conception of the coal mine are discussed in combination with the regional geological background.(1)The strata of the study area are mainly mica schist,mica quartz schist,mica q uartzite and quartzite in the early Paleoproterozoic Wuyan group.The tectonic deform ation is strong,and the strata of the mining area undergo multiple metamorphic defor mation,and the tectonic facies is more than three.Toughness deformation.(2)The main structure,the fault structure and the fold structure of the study area.There are three kinds of structures,such as the surface structure,the fault structure and the fold structure.Channel and ore-bearing spatial fault structures are the magma and hydrothermal channels in the process of mineralization,but often only in some favorable parts of the fracture.The production fold structure of the orefield and deposit has a direct or indirect distribution of magma intrusion and deposit.(3)The mining area Wang has experienced four tectonic deformation stress,the first level for the Hercynian period WE to the extension of the formation of the area of the formation of clumped coral sausage structure,And other horizontal shear structure;the second stage for the Indosinian WE to the SN and the direction of the two-way extrusion,the formation of asymmetric folds in the region,The third stage is the tectonic manifestation of the NNW-SSE direction in the Yanshanian period,and the third stage is the squeezing effect of the TVE in the Himalay period.(4)The ore deposit is finally formed in the Yanshanian-Himalayan period of orogenic collision stage,and the multi-level extension and stripping occurred in the area.Combined with the characteristics of ore-controlling structure and ore-forming material in the mining area,it is considered that the mineralization of the mining area is influenced by the late Jinning period.The strong orogenic fringes and the effects of collisional magmatic activity occur in the area,leading to partial remelting of the crust and large flooding of mantle magma to bring the mineral to the surface or shallow surface.In the Yanshanian-Himalayan period,the orogeny collision movement,so that the formation of ore-forming material reactivation,to magma-hydrothermal migration,in the structure driven to transport to the favorable space for mineralization.