The Extraction Of The Aberrant Remote Sensing Information In The Southwest Of Tuoli In Xinjiang

The southwest of Tuoli was choosed to be the study area in this arcticle, and the remote sensing aberrant information was analysed by the ASTER data and ALOS data.There are several steps to extract the aberrant information in this article as follows. First of all, the author does some pretreatment to the remote sensing image including geometric correction and noise reduction processing. In order to eliminate the impact of the study area from the things around it, the author deals with the remote sensing image by masking, and do some edge enhancement technology to get the line information. At this moment, the author chooses the best spectral bands to do color composite, and merges with the ALOS data to improve the spatial resolution of the result image. After that, the author extracts the tectonics information by the help of the existing geological materials. Third, the author chooses the best bands composite at the base of the statistical characteristics of radiation to do the supervised classification. At this step, the author chooses the AOI area to decide a template of the supervised classification. The author evaluated the template repeatedly until the author think the template has met the requirements of the supervised classification, then do the supervised classification by the interpretation of human-computer interaction at the base of the existing geological materials. At the last, the author extracts the alteration information from the remote sensing image by PCA(principal component analysis) at the base of summarizing many previous researches. This alteration information includes iron oxide-bearing minerals information, hydroxyl-bearing minerals and carbonate-bearing minerals information. All those minerals are hematite, goethite, jarosite, kaolinite, montmorillonite, illite, muscovite, calcite, dolomite, chlorite, biotite, and so on. After that, the author does some systematics to the alteration aberrant information. And the systematics contains iron oxide-bearing minerals information, hydroxyl-bearing minerals and carbonate-bearing minerals information which divided into three levels. The last work is to make a whole alteration aberrant information map.After finishing those jobs mentioned above, the author summarizes the results of the remote sensing information about the study area comparing with the remote sensing information of the other typical porphyry copper deposit in Balkhash metallogenic belt. At the same time, the author did some field work to verify the results, and the consequent is good.