Ophiolite Of West Junggar Remote Sensing Information Extraction And Feature Comparison

Due to the rapid development of remote sensing technology，alog with shortand high efficiency， Remote Sensing Technology work has been increasinglyhighlighted in geological erea， In particular, the application of remote sensinginformation extraction of ore is more and more recognized by geologists.Remotesensing information extraction including three aspect that Extract specific lithology，Construction information extraction and Mineralization and alteration informationextraction。 Remote sensing information extraction provide a basis and guidingsignificance for harsh environment, larger area, lower degree of work regions。This article mainly research west Junggar region outcropping Darabut ophiolitearea， Mayer Le ophiolite Karamay ophiolite and Tang Bale ophiolite belt，combination of these four geological data ophiolite belt, Application of ASTER datawere extracted and studied its remote sensing information.Through the ASTER datapreprocessing and image enhancement to extract important lithology, geologicalstructure and alteration of the information,，sought to more accurately reflect theenhanced image processing method of various information.One important lithologicalinformation，through HR-1024spectrometer to measure the spectral curve of fieldsamples taken， analysis curve corresponding Band characteristics of ASTERdata，Using Principal component analysis to extract peridotite and serpentinite, Theresults found that using ASTER data extraction more consistent with ophioliteinformation on the spatial distribution.Extract geological information,adoptingcombining Higher accuracy convolution filtering method and visual interpretation toextraction, draw a conclusion that ophiolite obviously controlled bytectonic.Alteration information extraction, using spectral library of rock JohnsHopkins University and USGS spectral library of the United States, using spectralangle mapping method to extract,finalize the ophiolite with closely related to thespatial distribution of chlorite, serpentine alteration minerals information space. Ultimately,by extracting the lithology, structure and alterationinformation,establishment of ophiolite interpretation signs,and verified byfield,comparison of geological maps,the results are consistent with the geologicaldata,and get satisfactory results.