基于构造与蚀变信息的找矿方法初探

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。

Initial ore-searching method based on the structure and alteration information

The extraction of rocky alteration information is an important aspect of remote sensing geological prospecting. The linear ring structure information which is one kind of instruction information also has the very vital significance for prospecting. Using Land-sat7 ETM + satellite image, the iron and the pelization alteration information extraction to the area of Yecheng of Xinjiang was per-formed based on principal components analysis and threshold segmentation. Aiming at the characteristics of linear and ring structure, a metallogenic prognosis to the study area was made. The prospecting prospect area was determined. This method is obviously effective and provides an effective way to speed up the geological prospecting work.