南美典型铁矿床遥感找矿模型研究  

Research on remote sensing ore-prospecting model for iron deposit in South America

作　　者：黄爽[1] 陈圣波[1] 查逢丽 李艳秋[1] 

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026

出　　处：《世界地质》2014年第4期946-951,共6页World Geology

基　　金：国家高技术研究发展计划(863计划)项目:全球巨型成矿带重要矿产资源与能源遥感探测关键技术(2012AA12A308)

摘　　要：针对南美地区两种典型铁矿—苏比利尔湖型和阿尔果玛型铁矿,基于ETM+遥感数据,采用光谱角方法提取研究区的羟基、铁染蚀变信息;通过影像增强,波段合成等预处理结合人工解译,进行赋矿地层和控矿构造信息提取。总结分析示矿信息规律和特征,建立遥感找矿模型,圈定2处遥感找矿靶区,缩小了野外地质调查范围。Aiming at the two typical iron ores in South America （Superior type and Algoma type）,iron oxide alteration and hydroxyl alteration information have been extracted from ETM ＋ data using spectral angle mapping （SAM） method.The authors conducted the information of host strata and ore-controlling structure by image enhancement and false color composite combined with manual interpretation.The rules and characteristics of ore information were analyzed and remote sensing ore-prospecting model was established.Through the synthetical study of the remote sensing model,two promising mineral areas were predicted and the scope of geological survey was narrowed.

关 键 词：增强型专题制图仪 遥感图像解译 蚀变信息提取 遥感找矿模型 

分 类 号：P618.31[天文地球—矿床学] TP753[天文地球—地质学]