Structural And Alteration Information Extraction In Remote Sensing And Prospecting For Prediction Research

Remote-sensing geological anomaly information extraction is one of an important content of remote-sensing geology.In this study,take Laos Truong Son Ra metallogenic belt for an example,through the study area's ETM + image rectification,image mosaic,color composition,space transformation,image enhancement to extract the study area line ring structure information;through mask technique,principal component analysis and filtering technique to extract the study area's ETM+ iron stained and hydroxyl Iteration abnormal information,based on this,combined with the study area's typical copper-gold deposit metallogenic model and prospecting model studying,using mask technique,principal component analysis,ratio method and filtering technique to extract two metallogenic province of study area's ASTER iron stained and hydroxyl Iteration abnormal information,combined with regional geology,mineral producing area and other informations,using GIS and weight of evidence method,delineateds the study area's prospecting favourable target area.This research has achieved the knowledge and results of the following aspects:(1)Preliminary built Laos Truong Son Ra's copper-gold deposit geology and other mineral resources database;(2)Base on the mechanism of remote sensing and regional metallogenic geological background,using7 scene ETM+(TM)data,combined with 16 scene DEM data,extracted the study area line ring structure in GIS platform.(3)According to 7 scene ETM+(TM)data,using mask technique,principal component analysis,ratio method,filtering technique and fractal threshold segmentation,extracted the study area's ETM+ iron stained and hydroxyl alteration abnormal information.(4)According to regional metallogenic regularity,combined with Laos Truong Son Ra indo fold belt Fukai porphyry-type copper-gold deposit and 14 skarn type gold deposit typical deposit anatomy,established various copper-gold metallogenic province's metallogenic regularity preliminary.(5)Using GIS and dynamic clustering method,carried out Laos Truong Son Ra's prospecting favourable target area delineation and resource potential evaluation.