一种新的遥感蚀变信息编图方法  

A New Mapping Method of Remote Sensing Alteration Information

作　　者：李建国[1,2] 于岩[3] 高学生[2] 陈圣波[3] 滕学建[2] 

机构地区：[1]中国地质大学地球科学与资源学院,北京100083 [2]天津地质矿产研究所,天津300170 [3]吉林大学地球探测科学与技术学院,吉林长春130026

出　　处：《地球科学（中国地质大学学报）》2015年第8期1346-1352,共7页Earth Science-Journal of China University of Geosciences

基　　金：中国地质调查局项目(Nos.1212011220469;1212011121029);国家高技术研究发展计划(863计划)项目(Nos.2012AA12A308;2008AA121100);国家自然科学基金项目(No.41402293)

摘　　要：利用遥感蚀变信息进行成矿预测已经得到普遍应用,但是并没有系统的编图方法,提出遥感蚀变信息等密度制图法以进行改进.它借鉴了地球化学场的编图思路,通过统计单位面积内各蚀变信息所占的面积百分比,进而生成面密度等值线图.利用该方法并结合线、环构造信息在内蒙古东乌旗地区圈定了8个成矿远景区.这种新的编图方法,既能有效增强多种蚀变同时出现时小面积蚀变信息,又能更直观的表达蚀变信息的总体空间分布特征和浓集中心,对圈定成矿远景区和优选野外验证点十分有利.Metallogenic prediction using remote sensing alteration information has been widely applied, but there is no systematic mapping method. This paper suggests a new method of isodensity map compilation of remote sensing alteration information. Following the compilation pratice of geochemical field maps, the percentage of the area of each alteration information per unit area is statistically calculated, and the contour map of the areal density is generated. During the remote sensing analysis and geological survey in Dongwuqi region of Inner Mongolia, eight metallogenic prospective areas were successfully delineated by means of this method with the inferred lineation and circular structures based on remote sensing interpretation. Compared to the traditional compilation methods based on pixel units, this new map compilation method can not only effectively enhance the small area information occurring simultaneously on various alterations, but also provide a more visual presentation of the overall spatial distribution and the concentration center of alteration information, favorable for delineation of metallogenic prospective areas and selection of places for further field investigation.

关 键 词：蚀变信息 编图方法 等密度 成矿远景区 野外验证 遥感 内蒙东乌旗. 

分 类 号：P627[天文地球—地质矿产勘探]