关键词: 遥感找矿, 铜矿, 蚀变信息, 遥感解译, 主成分分析, 成矿远景区, 找矿预测

Abstract: Xikeer area in Xinjiang is characterized by poor natural conditions and low degree of geological study,but many copper points with small scale are distributed in the area,the metallogenic geological background of the area is good.In order to provide some reliable information for the prospecting work of copper deposit in the area,taking the GF-2 and Landsat 7 ETM+ remote sensing image of the area as the study data,according to the characteristics of remote sensing image and some related geological data of Xikeer area,the interpretations marks of remote sensing images are summarized,and lithology and structure information of the study area are interpreted.The abnormal information is extracted from the Landsat ETM+ remote sensing image after removing interference by adopting principal component analysis method (PCA),besides that,the remote sensing alteration abnormal information is classified.The field geological investigation results show that mineralization alteration is well developed in the remote sensing alteration abnormal area.Based on the comprehensive analysis of regional metallogenic geological condition and typical deposits of the area,according to the spatial distribution characteristics of strata,structure and alteration abnormal information and the regional geochemical data,the metallogenic prognosis work is done,five metallogenic prospective areas (named as I#、II#、III#、IV#、V#) of copper deposit are delineated,among them,the number of the grade one metallogenic prospective area is two,the number of the grade two metallogenic prospective area is two,and the number of the grade three metallogenic prospective area is one.Good copper mineralization is found in the I# metallogenic prospective area by conducting filed geological investigation and verification work.The above study results indicated that the reliable of the metallogenic prospective areas delineated by the study is good,which further show that it is feasible to adopt remote sensing method to conduct metallogenic prognosis work in Xikeer area in Xinjiang.

Key words: Remote sensing prospecting, Copper deposit, Alteration information, Remote sensing interpretation, Principal component analysis, Metallogenic prospective area, Prospecting prognosis