The Research Of Remote Sensing Geological Mapping And Alteration Information Extraction In Sandaoling, Xinjiang

Sandaoling region,lying in the east of northern Tianshan,is tectonically located at the contact of bogda late paleozoic rift system and karamay suture zone.It can be mainly divided into three parts:1)northeastern part:consisting of karamay-moqinwula Au-Sn metallogenic belt and pertaining to tangbale-karamay late paleozoic complex Trench-arc belt;2)northwestern part:being comprised of Bositan Cu metallogenic belt and treated as the eastern extension of bogda late paleozoic rift trough;3)central part: being dominated by Haerlike Cu metallogenic belt and considered asnanhu lake in late paleozoic island arc.Sandaoling area with much land and few people, it is hard to achieve the desired resultsif we only depend on conventional prospecting method. This paper introduces the method ofcombining remote sensing, geochemical, geological to carry out the research of geologicalprospecting. Firstly, the paper analyzes the basic geological datas of the area, including thelithology, fault, fold, joints. Then the paper processes the Landsat remote sensing image datas,including the image data preprocessing (image correction, sub-image cut, image fusion), avariety of band combination. On the basis of the processing1:250000romote sensinggeological mapping is finished according to1:200000regional geological mapping ofSandaoling. Multi-spectral principal component analysis and Traditional Crosta method areapplied to this paper that is using ETM(1,2,3,4,5,7),ETM (1,4,5,7) and ETM (1,3,4,5) forprincipal component analysis, and the alteration information are successfully extracted.,theresult is satisfied. Finally, the paper, combined with1:250000geochemical data, circles twometallogenic prospective area,34prospecting target area, which guides the further areprospecting.