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遥感图像蚀变信息的提取是遥感地质找矿的一个重要方法,地质构造信息作为一种指示信息对找矿也具有非常重要的意义。本文利用Landsat7 ETM+卫星影像数据,通过主成分分析方法和阈值分割技术对新疆叶城县麻扎一带进行了铁化及泥化蚀变信息的提取,并结合研究区线性、环形构造的特点,对研究区进行成矿预测,创新利用比值方法剔除伪信息,圈定找矿远景区。此工作方法效果明显,为今后加快地质找矿工作提供了一条可参考、行之有效的途径。
The extraction of alteration information from remote sensing images is an important method of prospecting for geological prospecting. Geological structure information is also of great significance for prospecting as an indication of information. In this paper, we use Landsat7 ETM + satellite imagery to extract the iron and mud alteration information from the Mazha area in the Yicheng County, Xinjiang by principal component analysis and threshold segmentation. Combined with the characteristics of linear and circular structures in the study area, In the study area, mineralization prediction was made, and the ratio of innovation was used to remove the false information and the prospecting area was delineated. The effect of this working method is obvious, which provides a reference and effective way to speed up geological prospecting work in the future.