ALTERATION INFORMATION EXTRACTION BY REMOTE SENSING TECHNOLOGY AROUND OLD MINES IN VEGETATION-COVERED AREAS
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摘要:
植被覆盖区基岩裸露少, 围岩蚀变信息微弱. 为在老旧矿山边部开展找矿工作, 通过不同方法实验, 最后采用植被抑制+岩土体光谱测试组合技术完成蚀变信息提取. 该方法首先运用强迫不变植被抑制技术降低植被干扰, 其次采集已有矿山蚀变围岩及蚀变带岩土体光谱信息并建立研究区光谱样本库, 最后采用CART决策树分类技术完成蚀变信息提取. 实验证明, 基于植被抑制技术的CART决策树分类蚀变信息提取方法在植被覆盖区老旧矿山边部遥感蚀变信息提取效果较好.
Abstract:The wall rock alteration information in vegetation-covered areas is weak due to less exposed bedrock. To carry out prospecting work in the surroundings of old mines, after a series of experiments by different methods, the combined technology of vegetation suppression and rock-soil mass spectrum test is finally chosen for alteration information extraction. Firstly, the forcing invariant vegetation suppression technique is used to reduce vegetation interference, then the spectral information of altered wall rock and rock mass in altered zone of the existing mine is collected to establish a spectral sample library in the study area, and finally the extraction of alteration information is completed by CART (classification and regression tree) technique. The experiment results show that the CART alteration information extraction method based on vegetation suppression technique is effective in the extraction of remote sensing alteration information around old mines in vegetation-covered areas.
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Key words:
- remote sensing /
- alteration information /
- spectral curve /
- vegetation suppression /
- CART /
- old mine
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