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THE USE OF REMOTE SENSING AND GIS TO THE ECONOMIC GEOLOGICAL AND ENVIRONMENTAL RESEARCH OF MN-ORES, MACEDONIA AREA, GREECE
Abstract
The present study has been carried out with the use of Remote Sensing techniques in combination with Geographical Information Systems/GIS for monitoring and protection of the environment, in the surroundings of mining areas, as well as for developing new techniques for searching for new Mn-ore deposits, in Drama area, Northern Greece. Various digital processing techniques were applied on LANDSAT-TM imagery. These techniques included differe nt methodologies, such as the “Principal Component Analysis” (PCA), “Ratioing” , “Density Slicing”, “Inten sity Hue Saturation” (IHS) Transformation, and “Supervised Classifi cation”. In some cases, the methodologies were modified, in order to improve the final outcome. By the use of these processing techniques, various enhanced images were produced, the best of which were used to the False Colour Composite (FCC) synthesis. The above composites of the FCC images were used for the identification and mapping of areas with increased surface concentration of metallic minerals and delineation of photo- lineaments. Furthermore, various GIS information levels were created, such as ores’ occurrences, faults and drainage network, which were i nvolved in the GIS, in order to produce new maps. These new produced maps give more mineralogical and environmental information for the area, such as the relati on between ores and tectonics, the relation between ores and drainage network, etc.
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