Unique discoveryGGI states : Significant black unit discovery, unique for the district, over a broad area (206 meters thick in GC-15-03) at Grizzly Central, 2 km east of Kaketsa heat engine They are calling it unique to the district so it seems that it would be different than a classic porphyry. Not to mention that this "black unit" covers a strike length of over 1km....lots of tonnage.