Weixi - Lanping Lead-zinc Polymetallic Mineralization With Remote Sensing Information Fusion And Metallogenic Prognosis

Geological prospecting has developed from the traditional prospecting methods to the practical application of the theory of multi-source information fusion prospecting as the trend of ore prospecting from the surface to the deep. Multi-source refers to the superposition analysis of information such as geology, geophysical exploration, geochemical exploration and remote sensing, etc, and to combine the qualitative prediction and quantitative prediction, thus to form a rich metallogeny theory, and to provide a scientific basis for the prospecting of the deep, peripheral and concealed ore--bodies of the existing mine.Based on the national research project of the mineral vision "the research project of the 1 to 50000 mineral vision of Weixi-Lanping "Tongdian-Baihanchang" area in Yunnan province", and platformed with a geographical information system, this article superimposed and analyzed the multi-source geo-spatial information such as geology, geophysical exploration, geochemical exploration and remote sensing, etc., and used an theory of integrated metallogenic information prediction to find new resources to increase the reserves on the basis of the mining point in the study area. The study area Weixi—Lanping is located in the Three Parallel Rivers region, the mineralization is in good condition, and there has found a number of deposits around the study area. In this paper, based on the existing data, and under the guide of the theory of an integrated metallogenic information prediction, we fuse the multi-source prospecting information such as geology, geophysical exploration, geochemical exploration and remote sensing, etc. to determine the comprehensive information prospecting model. The knowledge and the results obtained are as follows:1. The establishment of the multi-source geo-spatial information database combined geology, geophysical exploration, geochemical exploration and remote sensing and played an important role in the division of the ore-controlling factors and prospecting marks. It will effectively determine the prospecting information.2. We can extract Iron-based and Clay-alteration minerals of the study area by analyzing the spectral characteristics of surface features, studying the spectral curve characteristics of the magmatite and metamorphic rocks and using the extraction method of the information of remote sensing abnormal alteration. 3. Interprate information and extract line and ring structure to the remote sensing images ETM, SPOT5 data in the study area using Erdas digital image processing software, and analyze quantitatively to the lineament extraction extracted such as equidensity, number of branches, center symmetry and excellent benefits degrees, ect. using Metallic Mineral Resources Analysis System Morpas to delineate remote sensing Exception Information. The north-east and north-west to the intersection of the study area conducives to the enrichment of ore body.4. Divide into a grid cell to the typical region of snowing right rock and Taohua village, calculate information value of the one-variable and complex variable, establish an integrated information model of prospecting and optimize seven oreprospecting target area, including 1 classⅠ,2 classⅡand 4 classⅢtarget area.