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遥感蚀变信息的提取是利用遥感手段找矿的一个重要环节,蚀变信息的提取可以为野外地质找矿提供重要靶区。以吐拉苏矿集区为例,基于围岩矿化蚀变理论,应用RS、GIS技术对Landsat8OLI遥感影像数据进行辐射定标、大气校正、彩色合成、镶嵌、裁剪、掩膜(去除植被,水体干扰)等预处理。参考研究区地质图、矿产地质数据库等地学数据,结合ENVI5.1遥感图像处理软件提取研究区域内遥感蚀变信息,并划分为3个等级,为该地区的找矿工作提供参考。
The extraction of remote sensing alteration information is an important step in prospecting by means of remote sensing. The extraction of alteration information can provide an important target area for field geological prospecting. Taking Tulusu mining area as an example, based on the mineralization alteration theory of surrounding rock, the data of Landsat8OLI remote sensing image were radically calibrated, corrected by atmosphere, synthesized by color, embedded, cut, masked (vegetation removed, Water disturbance) and other pretreatment. According to the geological data of the study area and geology database of mineral resources, the remote sensing alteration information in the study area is extracted with ENVI5.1 remote sensing image processing software and divided into three grades to provide reference for the prospecting work in this area.