Research on the application of the light-energy spectrum fusion technique to land and resources survey

This paper introduces how to use remote sensing images including Landsat (M SS and TM) and airborne radioactivity images to identify the type of rocks in the areas covered by vegetation. The relationship between light spectrum (Landsat MSS and TM) and energy spectrum (U, Th and K) is discussed on the basis of correlation analysis, and it is proven that there are correlation s between the Landsat MSS or TM data and the U, Th and K data. By using the fusion technique, new images were generated, which contain both the light spectrum and the energy spectrum information. Taking the Lucong basin as the study area, the present paper demonstrates t he successful identification of various types of rocks using the fusion tec hnique. Different types of rocks are represented by different colours on th e new light-energy spectrum images, so that volcanic rocks of the Jurassic and Cretaceous periods can be discriminated. Another example, in the Lingqu an basin in Northeast China, not only the different types of rocks are succ essfully distinguished, but corrections and modifications are also made on the original geological map after some field investigation. Practice has pr oven that the light-energy spectrum fusion technique is a good way in litho logic identification.