辽东地区矿化蚀变遥感信息提取的研究和应用

针对工作区(辽东-吉南)植被覆盖率高,河流水体及冲积物等干扰信息多的特点,本文采用比值法、主成分分析法和光谱角制图法相结合,进行大面积遥感矿化蚀变异常信息的提取;在矿化信息分割过程中,引入面向对象的思想,基于实地考察的蚀变信息提取模型,结合矿点、地质构造和遥感图像光谱特征和色彩等多种信息,对图像波段和像元统一进行因子分析和处理,确立切割阈值,克服了主成分变换后主成分分量物理意义不明确的缺点。本次工作建立起植被覆盖地区的遥感矿化蚀变异常提取的一套有效的技术体系,在遥感应用于找矿具有很强的现实意义。

The Study and Application of Mineralization Information Extraction by Use of Remote Sensing in East Liaoning

The study area(east Liaoning and south Jilin)is characterized by much vegetation and other surface coverings,such as water,wash and so on.In this thesis,the techniques of Band Ratios,Principal Component Analysis and Spectral Angle Mapping are probed for the extraction of mineral alteration information.For this purpose,the author introduced Object Oriented technology,combining with mineral positioning,geological structures and remote sensing image spectral and color characteristics in study area to establish segmentation thresholds.Consequently,a technical system for acquiring mineral alteration information in vegetation cover area has been established.It has the practical significance for mineral exploration using remote sensing.