Here is a description
ASTER Imagery Study:
ASTER (Advanced Spaceborne Thermal Emission Reflection) Imagery is commonly used to map specific types of alteration in bedrock that indicated the possible presence of mineralization. The ASTER study completed at Schaft Creek identified two zones of clay alteration. The first zone occurs in an area that extends from the north end of the GK zone to the ES zone. Mapping and prospecting within this zone of clay alteration has located chalcopyrite mineralization in outcrop and chalcopyrite-bornite mineralization in boulders and stream beds draining the zone. The second zone is located approximately 4 kms southwest of the Schaft Creek deposit, is roughly circular in shape and covers an area that measures 3.0kms by 1.5kms.
http://copperfoxmetals.mwnewsroom.com/manual-releases/2012/08/Copper-Fox-Drilling-Extends-Mineralization-In-Disc