光谱地质剖面在蚀变填图中的应用研究

The Application of Spectral Geological Profile in the Alteration Mapping

利用遥感数据可以提取与成矿有关的蚀变信息,地质剖面可以为所提取的蚀变信息的验证和深入理解提供依据;结合地质剖面和光谱信息提取的思路提出光谱地质剖面的概念。光谱剖面可以实现光谱沿剖面的存储、显示,而光谱地质剖面的目的主要是得到蚀变类型、矿物含量等参数沿剖面线的分布,实现蚀变矿物组合空间分带信息的提取。综合现有蚀变信息提取方法建立了光谱地质剖面信息提取的技术方法和流程,利用地面实测光谱建立了光谱地质剖面,并在光谱地质剖面的支持下利用图像进行蚀变信息的提取和分析,探讨了光谱地质剖面在蚀变分带和遥感找矿模式中的意义和作用,光谱地质剖面的建立有助于图像和地面光谱的一体化分析,有助于蚀变填图中信息的精确提取。

Geological section can help validating and understanding of the alteration information which is extracted from remote sensing images. In the paper, the concept of spectral geological profile was introduced based on the principle of geological section and the method of spectral information extraction. The spectral profile can realize the storage and vision of spectra along the geo- logical profile, but the spectral geological spectral profile includes more information besides the information of spectral profile. The main object of spectral geological spectral profile is to obtain the distribution of alteration types and content of minerals along the profile which can be extracted from spectra measured by field spectrometer, especially for the spatial distribution and mode of alteration association. Technical method and work flow of alteration information extraction was studied for the spectral geological profile. The spectral geological profile was set up using the ground reflectance spectra and the alteration information was extrac- ted from the remote sensing image with the help of typical spectra geological profile. At last the meaning and effect of the spec- tral geological profile was discussed.