Geological Features And Ore-Prospecting Prediction Of Aerqiale Lead-Zinc Deposit In Zhaosu County,Xinjiang

Based on the delineation and evaluation of the prospecting target in the large scale ore deposit in the deep and cold cutting mountainous area and Study on Prospecting Direction of Aerqiale Pb-Zn Deposit in Zhaosu County by China Nonferrous Metal(Guilin)Geology and Mining Co.,Ltd.Based on comprehensive collection of previous research results,analysis of regional geological backgrounds and the study of geological characteristics and metallogenic geological conditions of the Aerqiale lead-zinc deposit.Adopts mining area mapping,borehole rock core and tunnel logging,and taking?and? orebody as the research object,uses alteration rock multi-element analysis,thin and polished section identification,analysis of rare earth content and Inclusion composition test etc,to study the geochemical characteristics of the deposit and explore the genesis of the deposit.Summarize the rules of mineralization,carry out deep geophysical prospecting,and carry out prospecting predictions in the deep part of the mining area.The main achievements and understanding are as follows:(1)The Aerqiale lead-zinc deposit is located in the late Paleozoic rift-type fold belt developed on the Ili block.The ore body is produced in the limestone of the lower carboniferous akeshake formation and the orebodies are layered and stratified.Subject to horizon control.Found two layers of copper-rich lead-zinc ore body,mainly composed of galena,sphalerite,a small amount of chalcopyrite.The gangue minerals are mainly actinolite and a small amount of calcite etc.Wall rock alterations mainly include actinolitization,silicification,Chloritization,epidotization and carbonation.(2)Through R-type cluster analysis pedigree map of trace element multi-element analysis data and enrichment coefficient sorting chart.It was found that elements such as Zn,Co,Sb,As,Au,Ag,and Pb originate mainly from deep crust,cu is the result of superimposition of late-middle acid magmatism and structure.This is consistent with the rare earth characteristics of the ore.(3)Comprehensive analysis of characteristics of rare earth elements in deposits,posses the characteristics of weak Ce loss,obvious negative Eu anomaly,Light rare earth enrichment and heavy rare earth loss.Similar to the typical characteristics of hydrothermal jet deposits.The main ore-forming elements of lead-zinc ore body mainly come from deep magma,and the copper-rich ore body is related to the later thermal fluid transformation.(4)The sulfide sulfur isotope composition of the deposit approaches near zero,which is close to the characteristics of sulfur isotopic composition of the meteorite,indicating that the sulfur is derived from mantle or deep crust.The lead isotopes of ores and volcanic rocks are located between the mantle lead evolution curve and the lead evolution curve of the orogenic belt.There is a certain degree of genetic relationship between ore-forming materials and volcanic rocks.The age of the lead isotope model was measured at 239-240 Ma,which was slightly later than the volcanic age of the early carboniferous epoch dahalajunshan Group and still belongs to the Hualixi period.Hydrogen and oxygen isotopic compositions of mineral inclusions,the source of ore-forming fluid is mainly atmospheric water.The homogenization temperature of the inclusion has two stages of high temperature and medium-low temperature.(5)Synthetic Geological Study of Lead and Sulfur Isotopes,REE Characteristics,and Multi-element Combination Characteristics.The Aerqiale lead-zinc deposit is considered to be a hydrothermal jet deposit.The ore-forming actinolitum rock is the product of jet deposition.Magmatic hydrothermal superposition reconstruction was in the later stage,establish mineralization mode.(6)According to deposit control characteristics and metallogenic model,combined analysis of deep exploration of geophysical prospecting and drilling results.Prediction of ore prospecting in mining area,it is discovered that the deposit has reached a medium scale and has large ore prospecting potential.