Research On Remote Sensing Information Extraction Of Porphyry Type Copper Mine In Tibet Of Yu-Long Region

The San Jiang metallogenic belt is one of the three most important metallogenicbelts in Tibet. YuLong Porphyry Copper finding reveal that the metallogenic belt hasa unique advantage In terms of mineralization.By reading many basic geologicalmaterials,geophysics materials and geochemistry materials which a lot of Previousstudyed in the study area, and summarize the typical Porphyry Copper Mineralizationdiscipline in the region.To extract remote sensing tectonic information,remote andremote sensing Mineralization and alteration information through a variety of remotesensing digital image processing techniques.Making use of GIS spatial analysis toolsto interactively analyze with remote sensing prospecting information and otherprospecting information.Metallogenic theory as a guide to be favorable areasdelineated mineralization.The paper has made following understanding:The structuresof ore-controlling,ore-bearing strata,mineralization pluton and wall-rock alteration ofthe typical deposit is analyzed.As a guide to metallogenic theory, summarizedore-forming mode and prospecting criteria in the region.By band combinationenhancing image contrast ofremote sensing,image fusion,spatial filtering and withbasic geological maps to build Interpretation key which is used to extract more remotesensing Lineament tectonic and circular tectonic. The Interpretation of tectonicdominated by the NW and NWW trending, which followed by NE and EWtrending.According to two-dimensional scatter plot of characteristics of minerals suchas iron alteration and argillation correlation waveband to compare ratio method withPrincipal component analysis and Comprehensive analysis, and use Principalcomponent analysis method to extract the abnormal iron information and abnormalhydroxyl information for the study area,and find that the abnormal iron informationpoints out the location of Porphyry Copper. Use fractal theory alteration informationclassification. Mask interference information after extracting alteration informationfor the characteristics of remote sensing image.Using GIS spatial analysis tools toanalyze formation lithology,remote sensing tectonic information,Geophysics material and Geochemistry material, establish a preliminary prospecting model of remotesensing of porphyry type copper and delineate favorable mineralization areas.