| An area, 15 by 15 km, at the northeastern edge of the Sudbury Structure was studied using an image analysis system to enhance Landsat TM and SAR images and also to integrate several sets of geoscience data. Data, including Landsat TM images, C-band SAR images, a geological map, a surficial materials map, radiometric maps of U, K and Th and a Bouguer gravity map have been digitized and/or co-registered into a multi-thematic image database. Lineaments were the main features mapped from five selected images. Circular features, an olivine diabase dyke, traces of sedimentary strata and direction of schistosity were also observed. Data were converted to theme maps, which were combined to produce mineral potential maps. Results show that the high potential areas correspond closely to known Ni-Cu deposits. The image analysis system can be used to combine and analyse different datasets, therefore, the technique applied here may ultimately become a useful tool for mineral exploration. (Abstract shortened by UMI.)... |
