Analysis Of Hyperspectral Remote Sensing Alteration Mineral And Prospecting Of Ore Concentration Area In Huaniushan,Gansu Province

The Huaniushan Ore Concentration Area is a polymetallic mineral deposit in Beishan.There are Huaniushan lead-zinc deposits(medium),Huaniushan gold deposits(small),Huaxishan gold deposits(small),and Huaheitan molybdenum deposits(medium)and several gold,silver,tungsten,molybdenum mine.Existing results show that the genesis of gold and molybdenum deposits(points)in the area is closely related to magma / hydrothermal activity.This paper analyzes the alteration characteristics of typical deposits(spots)in the research area by two methods,spectral measurement and analysis of ground samples,and interpretation of hyperspectral remote sensing,combined with the information of airborne hyperspectral altered minerals,and the prospecting prediction was delineated Area to provide a basis for further prospecting and prospecting.in an attempt to provide a basis for further prospecting and exploration.By studying the relationship between the types of minerals and mineralization in typical deposits,it is found that the altered minerals developed in the Huaniushan gold deposit mainly include goethite,gypsum,nontronite,jarosite,hematite and hornblende,among which the iron oxides(hematite,goethite)and sulphate minerals(gypsum,jarosite)are most closely related to gold(mineralized)bodies.Altered minerals developed in the Huaxishan gold deposit include muscovite,goethite,montmorillonite,hematite,jarosite and paragonite,among which the sericite minerals(muscovite / illite,paragonite,phengite),iron oxides(hematite,goethite),iron sulfide(jarosite)are most closely related to gold(mineralized)bodies.Altered minerals developed in the Huaheitan molybdenum deposits include goethite,muscovite,biotite,hematite,phlogopite and phengite,of which the hornfelsized,silicification,sericitization and pyritized are most closely related to molybdenum-tungsten(mineralized)bodies.According to the combination of typical altered minerals in the deposit and the geological background of the deposit,it is found that Huaniushan gold deposit may be a composite type with hydrothermal exhalative sedimentation and later skarnized transformation.Huaxishan gold deposit may be an medium and low temperature hydrothermal altered rock type gold deposita.The Huaheitan molybdenum deposit.Huaheitan molybdenum deposit may be a hydrothermal vein type deposit.The CASI-SASI-TASI hyperspectral remote sensing data was used to extract and analyze mineralization favorable information such as alteration information,lithologic contacts and structures of the ore concentration area.The results show that the Huaniushan ore concentration area development many mineralization favorable information,such as faults,folds,lithological contact zones,silicification,sericite,limonitization and jarosite.A hyperspectral remote sensing prospecting model of typical deposits in the area has been formed,and a gold prospecting area was delineated in the southwest area.The above research results unanimously show that the use of hyperspectral remote sensing data can play an important role in the prospecting prediction in the periphery of Huaniushan Ore Concentration Area,and also has great prospecting potential.