一、前言机载热红外扫描,是六十年代初期发展起来的一门遥感应用技术。这种方法不仅在地热普查,寻找海底淡水泉,水质污染监测等水文地质方面得到了成功的应用,而且在地质方面的应用实例也日趋增多。由于热红外辐射包含着物质内部成分的某种讯息,因此,曾应用凌晨的热红外扫描,区分砂岩和粉砂岩,灰岩和白云岩,利用红外扫描两个波段的比值法,区分岩石中SiO_2的不同含量。又由于红外扫描所获得的地面讯息,具有视野大的特 I. Introduction Airborne thermal infrared scanning is a remote sensing application developed in the early 1960s. This method has been successfully applied not only in the geothermal survey, the search for the seabed freshwater springs, hydrogeological monitoring such as water pollution monitoring, but also the increasing application in geology. Due to the fact that thermal infrared radiation contains some kind of information about the internal composition of matter, thermal infrared scanning has been applied in the early morning to distinguish sandstone, siltstone, limestone and dolomite. The ratio of the two bands of infrared scanning is used to distinguish the SiO_2 Different content. And because of the terrestrial information obtained by infrared scanning, with a large field of vision