Landsat-8 OLI遥感数据的矿化蚀变信息提取——以重庆市彭水县为例

利用重庆市彭水县Landsat-8 OLI遥感数据和ERDAS-9.3软件进行一系列的图像增强及几何校正处理,对波段进行相关性分析,按照波段特征,选取OLI7、OLI5、OLI4波段作为基础信息源。应用图像的掩膜技术,除去植被信息的干扰,并结合典型的蚀变矿物光谱特征,运用主成分分析方法提取该区域的矿化蚀变信息,主要为铁染及羟基蚀变信息。分析表明,区域已开采矿产资源的分布情况与结果吻合,为后续的区域找矿工作提供了可靠方向。

Extract Mineralized Alteration Information from Landsat-8 OLI Remote Sensing Data: Taking Pengshui County in Chongqing as an Example

In the support of ERDAS-9. 3 and based on the Landsat-8OLI remote sensing data of Pengshui, through a series of pre-processing works on the image, such as enhance the image and geometric correction, After that, analyzing the correlation of bands, according to the features of band, select OLI7, OLI5, OLI4 band as basic information sources. Application of the technology of mask to remove the vegetation interference information, and then using the method of Principal component analysis to extract the mineralized alteration information based on typical alteration mineral spectrum characteristics, which is mainly of iron staining alteration informa-tion and hydroxyl-altered information. Analysis shows that contrasting the distribution of the in mining mineral resources, the result is reliable. All of this will provide reliable direction of prospecting work in the area.