摘要
基于ETM数据的矿化蚀变信息提取方法的选择主要为:①根据野外波谱测试数据,建立蚀变矿物波谱数据库,并按ETM数据的波段对波谱库进行相应的重采样,使得重采样后的光谱分辨率与ETM的光谱分辨率相匹配,以选择矿化蚀变信息提取的最优波段组合;②根据矿化蚀变信息提取的最优波段组合,分别采用比值(组合比值)、主成分分析(多重主成分分析)和光谱角填图等方法提取铁化、泥化和硅化信息,并对所提取的各类矿化蚀变信息进行可靠性评估,优选可靠性较高的矿化蚀变信息作为依据,结合区域成矿地质条件进行成矿预测。
Mothod choice of the ETM data-based mineralization alteration information extraction follows the procedure： ①database establishment of alteration mineral spectral tested in the field and corresponding re-sampling from the database according to ETM data and making match of the re-sampled resolution to that of ETM then picking up optimum band combination for the information extraction;②using the optimum band combination to extract iron tincture,argillation and silicification information by means of ratio （combination ratio）,principal component analysis （multi-principal component analysis） and spectral angle mapping and evaluating reliability of each extracted information then making ore prediction with highly reliable information in combination with the regional geological and metalognenic setting.
出处
《地质找矿论丛》
CAS
CSCD
2008年第2期165-168,173,共5页
Contributions to Geology and Mineral Resources Research
基金
青海省地质勘查项目"青海省柴北缘成矿带1/5万遥感地质调查解译及成矿信息提取"([2006]02号)资助
关键词
矿化蚀变
信息提取方法
波谱测试及处理
柴达木盆地北缘
成矿预测
mineralization-alternation
information extraction
spectrum test and processing
northern marginal of Chaidamu basin
metellogenic prognosis
