Touraine County Of Qinghai Province Hong Qi Trench Gold Mining Area,including Ore Belt Ore-controlling Tectonic And Metallogenic Mechanism Research

For the Hongqigou gold deposit of Wulonggou ore field in East Kunlun,based on the early research of the tutor team and the existing exploration results,Through field geological survey and analysis of geological characteristics of ore deposits,the control features of magmatic emplacement,mineralization,alteration and ore body output at different levels are systematically analyzed,come to the following understanding:Wulonggou ore field is controlled by Golmud-Wulonggou deformation metamorphic core complex,experienced early ductile deformation and late brittle deformation.Early ductile deformation can be divided into two stages: ductile and ductile-brittle.The ductile deformation stage has the characteristics of the sinistral positive slip;The brittle-ductile deformation stage can be further divided into three sub stages,it has the characteristics of the sinistral positive slip?the sinistral thrust ?the dextrorotation positive slip.Late ductile-brittle deformation stage can be further divided into three sub stages,it has the characteristics of the dextrorotation positive slip?the sinistral thrust?the dextrorotation positive slip.Multi-stage brittle ductile and ductile brittle deformation development,formed a network fracture pattern of the North West trending main structure line in mining area,thereinto,NNE,NNE and EW faults are secondary faults formed by the different trends evolution of main faults.Metamorphic core complex structure and early brittle ductile fault fold tectonic control early batholith emplacement and distribution;Multi-stage the different trends ductile brittle deformation of folds and faults deformation structure,On the one hand,controlled the emplacement and spatial distribution of different types of late apophysis,dike and stock,On the other hand,the early formed large rock mass is subjected to deformation and failure.A network of faulted fold systems dominated by NW fold faults in watchcase and deep decoupling thrust-nappe fault,combined to form the mineralization control system of Wulonggou gold ore field including the red flag gold deposit,control the formation of mineralized alteration zone,many different trends of active faults in the trunk,derived from different occurrences in different periods and different supporting secondary fracture,fracture and supporting the main faults,different parts of extrusion,stretching the different conditions of extensional faults constitute the current relaxation ore/liquid structure,resulting in NW and NNW,and near EW trending faults control mineralization alteration variable NNE belt.Gold ore bodies strictly produced in the mineralized alteration zone,due to the regularity of spatial distribution of different classes of faults control mineralization alteration,ore body production issued by the lateral distribution of reproduction,pinch reproduction,a few along the fault zone between the collapse part through shear joints in the fold formation of the output.