Mineralization Alteration Information Extraction In Remote Sensing Images And Mineralization Forecast In Wang Xiang Mufu Mountain

At present, the majority of outcrops or shallow excavation or mining of minerals has been exhausted,it is more difficult to find new sources of mineral, especially in geographic inaccessible areas of poor environmental conditions.In recent years,using multi-spectral remote sensing images alteration of information extraction, remote sensing geological research become more popular and hard , although the qualitative and quantitative analysis has also made some achievements, but for some area of which the geological data is not completed,dose not had the corresponding method.How to direct use of multi-spectral remote sensing data to extract the alteration information, delineated prospecting target to achieve the purpose of forming projections, That is an urgent issue need to be solved.In this thesis, the scene of Hunan Wang Xiang-Mufu Mountain district as the study area, the GIS platform,using remote sensing data processing technology, the ETM+ and ASTER multi-spectral remote sensing data such as geometric correction to the interference information(denoising),and contrast color compositeenhancement preprocessing; of various spectral characteristics of different alteration minerals,and corresponding ETM+ and ASTER images of the band spectral characteristics and differences,thus establishing the alteration based on spectral classification of remote sensing informationextraction and enhancement of the extracted band package.On the ETM+ and ASTER multi-spectral remote sensing data such as principal component analysis, respectively, the ratio of processing data analysis and processing methods, information extraction in remote sensing alteration.Extracted according to the remote exploration geophysical and geochemical information, and other information have been there to data and GIS-based technology foundation for systematic,comprehensive analysis and processing, and ultimately to mineralization projections; in the study area were delineated ore target District four.After a field inspection and target validation, degree of mineralization consistent with good prediction. This research aims to a comprehensive evaluation of northeastern Hunan Province polymetallic prospecting, and then the other in Hunan province and the country promote the use of hydrothermal alteration type of mine.