The Study Of Prospecting Model Of VMS Copper Deposit In East Tianshan Mountain

Tectonic movements and magmatism are occurred in East Tianshan Mountain which is between Kazakhstan-Junggar plate and Tarim plate.Therefore,East Tianshan Mountain has favorable ore-forming conditions.The paper based on predecessor research work.Xiaorequanzi and Lingyun copper deposits will be choosed as typical deposits,which have the representatives of geological background and geophysical anomaly.In-depth analysis of the geological background?geological characteristics?ore-controlling factors and geophysical features,which can be focus on the indirect prospecting and data interpretation to guide the exploration.This thesis which based on geological features of Xiaorequanzi copper research physical characteristics.By comparing the density of the ore and surrounding rock,the ore show significant gravity anomaly.With the analysis of electrical data,the sulphide copper-based have the characteristics of high polarization and low resistivity.In Xiaorequanzi geological property of copper deposits,based on physical property of mine,come to ore mineralization and the surrounding rock has a different density,can form a significant residual gravity anomaly.Combined with IP logging,low resistance electrical parameters,high-polarization corresponds to the main copper sulfide,can be used to polarization and resistivity difference between the premise of the induced polarization method and high-precision gravity survey delineated range of ore mineralization indirectly.Using induced polarization which is on the basis of differences in resistivity and polarization and gravity measurements,we can delineate mineralization range.TEM in this area was to find the effect of high-grade ore,low resistance corresponds to a better body and high-grade ore bodies,ore bodies can be used for spatial orientation research,provide the basis for the drilling project.Controlled source audio magnetotelluric method(CSAMT)applications,mainly used to study the deep structure and ore information.As Lingyun strong copper supergene oxidation,secondary enrichment zone is developed,the ore mineral assemblage,mineral structure and other aspects of Xiaorequanzi there are some differences in copper,geophysical anomalies and Xiaorequanzi copper are not the same,the performance of the gravity high,relatively high-and middle-polarization resistivity characteristics.By Xiaorequanzi typical deposit of copper and copper Lingyun comparative study,found that two deposits in the geological setting,structure,alteration types,mineralization age of ore occurrence,and so has the inherent similarities in the mineral structure and the composition of the gangue minerals there are some differences,and made the East Tianshan volcanic copper ore-controlling the two main factors.Through this research,mineralization process of VMS copper in East Tianshan Mountain which was divided into three periods was summarized:spray forming?hydrothermal superimposition and supergene oxidation.Geological and geophysical prospecting model of VMS copper was built in East Tianshan Mountain and a set methods and techniques for deposit-scale which combine gravity?induced polarization?TEM and CSAMT was proposed.These will quickly and efficiently provide appropriate evaluation model and method to detect the same type of deposits in East Tianshan Mountain.