Accurate and dependable mapping of alteration minerals is essential for exploration projects. Using satellite images, PhotoSat’s proprietary processing methods enable exploration targeting through the clear and reliable identification of alteration minerals relevant to several different deposit types including epithermal gold and silver, and porphyry copper.

INTRODUCTION

PhotoSat offers a geological alteration mapping package produced using WorldView-3 high resolution satellite photos, with about 64 times the resolution of ASTER alteration mapping. In areas of sparse vegetation, 16 band WorldView-3 photos are used to map opal/chalcedony, kaolinite, jarosite, sericite, chlorite, calcite and many other minerals for epithermal gold and silver and porphyry copper exploration.

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ACCURACY

The WorldView-3 satellite provides better spatial resolution than the ASTER satellite and its smaller pixel size is extremely beneficial in areas with only small outcrops. WV3 SWIR pixels are 3.7 m compared to ASTER SWIR pixels at 30 m. WorldView-3 also provides better spectral resolution than ASTER (16 bands versus 9 bands in the Short-Wave Infrared (SWIR) and Visible and Near-Infrared (VNIR) ranges) enabling clearer identification of mineral types. 

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REFERENCE MATERIALS

We regularly publish case studies and reports; sharing proven success stories and best practices that demonstrate the effectiveness of our alteration mapping packages. 

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