The South Australian Department of Mines and Energy (SADME) commissioned the South Australian Centre for Remote Sensing (SACRS) to undertake a digital analysis of Landsat Thematic Mapper (TM) data in an attempt to locate prospective areas for conducting exploratory drilling in the Gawler Range Volcanics (YARDEA 1:250 000 map sheet). No specific commodities were indicated, but iron oxide and clay anomalies were of major interest. SADME had access to three TM scenes covering the area of interest. The first step involved geometric correction of each image to an Australian Map Grid (AMG) base. Each image was then radiometrically matched to the adjoining two images. Mosaicking required the positioning of cut-lines and subsequent merging of the three TM scenes. Having thus prepared six of the seven TM bands available (discarding the thermal band 6), processing focused on extracting the maximum radiometric information possible to aid in identifying potential hydrothermal alteration zones. After dark-pixel correction, band ratios were performed to produce black and white images depicting potential clay and iron-oxide concentrations. Albedo, principal components and other ratios were prepared and retained as digital files. Three other forms of analysis were performed for this project using the corrected images. A fracture pattern interpretation was performed on a TM band 5,4,2 : Red, Green, Blue image. This was rendered into hardcopy as vectors embedded in a colour image, and was also transported to Arc/Info for plotting and analysis as a fracture pattern map. Secondly, geochemical plots from Sudgen and Marinelli (1990) were scanned and integrated with the Landsat data. An analysis of the correlation between geochemical anomalies and the spectral responses of cover in the vicinity of elevated values was undertaken. Training areas (i.e. areas used for calibrating a computer to perform automatic matches of spectral response with other, hard geoscientific data) were derived directly from the graphical overlays. The best two-band ratio with the potential for enhancing spectral features which might correlate with geochemical anomalies was shown to be Band 3/Band 4. Thirdly, geophysical data were made available in the form of total magnetic intensity (TMI) and radiometrics in the form of total counts (TC). The magnetic data were shaded and merged with the radiometrics using the Intensity, Hue, Saturation (IHS) algorithm, and a hardcopy produced and supplied to Adelaide University. Both the TMI and the TC appear to highlight surface topographic features. The Geophysics Department at the University of Adelaide is undertaking the interpretation of these data. Several sites of intense fracturing evident on both the geophysics and the satellite imagery could represent localised conduits for the movement of hydrothermal fluids or meteoric waters, either of which could provide a mechanism for mineralisation.