A Study And Application For Geochemical Exploration-remote Sensing Information Fusion Method In Complex Topography Conditions Of Copper Gold Outer-ring Of Tibet Xiong Village

In recent years,with the rapid development of the remote sensing technology,GIS and computer technology,the integrated prospecting method combining remote sensing,geological method,geophysical method and geochemical method have become the important direction of mineral resource exploration in the future. Based on studying geochemical data and remote sensing data characteristics and geochemical prospecting anomaly and sensing anomaly extraction information method,this paper confuses remote sensing altered information and geochemical anomaly information by data fusion technology,taking fierce Lielang-Gila-Tong River polymetallic research area as an example to discover the integrated prospecting information.This paper is composed of :using geochemical prospecting achievements and remote sensing image data of the first island type porphyry copper of gold outer-ring in tibet wolfgang bottom ore belt,collecting sufficient mineralization characteristic information of the geological and typical study area , studying geochemical prospecting data characteristics,remote sensing data characteristics and geochemical anomaly/sensing anomaly information extraction theory & method ,extracting geochemical prospecting data and remote sensing data special information of research area,studying fusion processing based on raster image including methods of pixel level fusion,feature level fusion and decision-making level fusion,focusing on remote sensing data and geochemical data fusion processing technical method.This paper major study achievement is composed of: taking fierce Lielang-Gila-Tong River polymetallic as research area,determining anomaly lower limit information of the five elements by using the content-area method of fractal theory,getting remote sensing image of the research area by pre-treating atmospheric correction,precise geometric correction,image mosaic and branch area cutting for ETM+ data,extracting remote sensing altered information by using feature principal component analysis and band operation,fusing remote sensing altered information and chemical prospecting anomaly information for fitting well with the field detection results as the reliable basis for the optimized target areas by using vector-grid or grid-grid overlay,weighting fusion,IHS transformation. In conclusion,data fusion is one of an important method to search mineral by using remote sensing data and geochemical data.