Study Of Remote Sensing Information Extraction Of Alteration In East Kunlun

With the rapid development image processing techniques of the remote sensing, the methods of remote sensing have been a mainstream of the modern Ore-hunting indicator method. With the development of the new methods, it applies the extracted remote sensing information, produces new methods of the extracted mineralization alteration information liked spectral angle mapper classify.Wallrock alterations is an important indication for exploitation, it means that the componential, ructural and tectonic change of the rock result from the temperature, fizzwater hydrothermal and hydrothermal. Frequently, the ferriferous metallic mineral and alteration mineral which have OH ?or CO3 2?. Because of hydrothermal ore-forming solution, most of endogenetic deposit have pyrite mineralization, sercitization, carbonizations etc alteration phenomena, moreover, the region of alteration is bigger than deposit, this provides conditions for information extraction of alteration. Most of altered rocks have major Fe 3+,O H ?,C O3 2?. These ion have reflected or absorbed key band, but the chemical constituent of rock-forming mineral (Si, Al, Mg, O) don't above-mentioned spectral diagnostics, this is the physical foundation of information extraction of alteration.This research is about utilizing the ASTER multispectral data and Hyperspectral remote sensing data to do some research on alteration information extraction in East Kunlun. First do some research on geology about East Kunlun district, according to mineralogy rules we decided do extract alteration information about three types of minerals, they are kaoline, sericite, chlorite, muscovite, calcite, chalcopyrite, pyrite. It analyzes and to summarizes spectral characteristic of alteration information. Then apply all kinds of methods including the method of Hyperspectral remote sensing to extract alteration information and obtained much space distributing information of alteration information. According to the study of spectral match, it proposed a spectral match algorithm about Hyperspectral Remote Sensing and applied the algorithm to extract alteration information. Finally it compared the results and proved that the algorithm is feasible.