The Application Of Remote Sensing Technology In Uranium Geology Survey,Xinjiang Dabancheng Wheatgrass Ditch Area

Dabancheng wheatgrass ditch area is located is located in Junggar plate and Tarim plate spliced zone on the north side of the back arc basin, belonging to the Northern Tianshan fold belt of uranium mineralization in Bogda anticlinorium, metallogenic conditions are unique, metallogenic potential is tremendous. However, due to natural climatic conditions and terrain conditions are poor, for uranium geological exploration work has caused great difficulties, since the area is stilla uranium mine geological mineral exploration degree is low in the area of Dabancheng wheatgrass ditch. Based on 1:100000 and adjacent area 1:50000 area ore adjustable results data as the foundation, this paper using remote sensing technology, uses ENVI, ERDAS, PCI and other data processing software, remote sensing data preprocessing the original work is 1:50000 geological interpretation of remote sensing alteration information extraction work and provide the basic data. The research results can provide reference for rational deployment of field focus, and consequently reduce the workload of the field, shorter working hours, lower capital investment, effectively improve mapping accuracy and quality.In the process of Remote Sensing 1:50000 geological mapping of Dabancheng wheatgrass ditch area, the WorldView-2 data(resolution 0.5 m) and ETM+ data(multiband), using the geometric correction, image Mosaic and linear contrast stretch, resolution fusion and a series of remote sensing image enhancement processing method, expand the contrast between the different geologic body, improve the degree of remote sensing image interpretation.According to remote sensing image of lithology, geological parameters and geological structure of identifiable degree, to remote sensing image according to the degree of interpretation in the study area is divided into three levels.Using the principle of remote sensing image visual interpretation methods, divided into 7 stratigraphic interpretation unit and 4 rock interpretation unit,, according to the result of field route geology survey, establishing and perfecting their marker of remote sensing, processing method with the help of computer aided interpretation at the same time, develop the Dabancheng wheatgrass ditch 1:50000 remote sensing geological interpretation chart, interpret results and precision meet the requirements of work.Using "to interfere with the abnormal principal component threshold technology", to extract the "alcohol" in the study area and dye "iron" alteration information.Using ArcGIS platform advantage in data integration, and alteration information in the study area, structure information of the overlay, combined with metallogenic belt in the analysis of the typical ore deposit ore-controlling factors, delineated of the potential prospecting areas, indicate the direction for the next step prospecting work.