基于ASTER和ETM+数据的蚀变信息提取比较研究——以西藏泽当矿田为例  

Extraction of Alteration Anomalies Based on ASTER and ETM+ Data:A Case Study of Tsedang Orefield,Tibet

作　　者：黄照强[1] 李祥强 

机构地区：[1]中国冶金地质总局矿产资源研究院,北京100025

出　　处：《地质与勘探》2009年第5期606-611,共6页Geology and Exploration

基　　金：中国冶金地质总局科研项目"西藏冈底斯东段铜多金属资源评价与新方法技术研究"资助

摘　　要：利用ASTER和ETM+数据分别对西藏泽当矿田试验区进行了遥感数据矿物蚀变信息提取。根据研究区岩石矿物光谱特征,采用主成分分析法,提取了含三价Fe离子和粘土矿化蚀变信息,通过对两者提取的结果进行比较之后认为,ASTER数据比ETM+数据在矿化蚀变信息提取中能进一步识别不同类型的含羟基蚀变矿物,并且也能很好的提取含三价Fe离子蚀变信息,未来具有较大的优势。Remote sensing has been one of the important technical ways of geology mapping and exploration. Lithology identification, geological construction interpreting and alternation anomalies extraction strongly support exploration using remote sensing. In this study, extraction of alteration anomalies is implemented based on ASTER and ETM ＋ data on Tsedang Orefield, Tibet. According the spectral feature of mineral, ferric - iron - oxide and clay alteration anomalies had been extracted using principal component analysis （PCA）. Through comparison the extracted results of ASTER and ETM ＋ data, the paper shows that ASTER data has better capability for identification of sorts of hydroxide alteration mineral and extraction of ferric - iron - oxide alteration anomalies than ETM ＋.

关 键 词：ASTER ETM+ 蚀变信息 光谱 主成分分析 泽当矿田 

分 类 号：P627[天文地球—地质矿产勘探]