摘要
金矿遥感探测之关键在于成矿构造及铁氧化物、含羟基蚀变矿物信息的提取。以张家口下双台地区为研究区,利用ENVI 4.0图像处理软件,通过"多元数据分析+比值+主成分变换+密度分割+分类"等方法,从Landsat-7 ETM数据中提取矿化蚀变信息并抑制植被波谱干扰,方法快速、准确、有效。结果表明,利用该方法获得的矿化蚀变信息与已知矿点有很大的一致性,该方法是可行的。
The key point for gold exploration using remote sensing technology is the information extraction of ore - forming structures and spectral characteristics of ferrite oxides and altered hydrous minerals. On the basis of the remote sensing image processing software （ ENVI 4.0） and by using a new quick, exact and effective method for extraction of gold mineralization and alteration information, namely ＂multivariate data analysis ＋ ratio ＋ PCA ＋ DS ＋ classification＂ ,the spectral characteristics of altered minerals can be extracted, and the influence of the vegetation can be suppressed. It is demonstrated that the gold mineralization and alteration information is in accordance with the known mine spot, and the method is very feasible.
出处
《国土资源遥感》
CSCD
2010年第4期56-59,共4页
Remote Sensing for Land & Resources
基金
河北省地质勘查资金项目(编号:[2005]041)资助
关键词
ETM
蚀变信息
图像比值
主成分变换
密度分割
ETM
Alteration information
Image ratio
Principal Component Analysis （PCA）
Density Slicing（DS）
