The U2 North showing occurs on a resistant, slightly gossanous ridge of Lower Jurassic felsic volcanic rocks of the Hazelton Group (Betty Creek Formation). These include flow-banded rhyolites, spherulitic rhyolites, dacitic to rhyolitic ash-flow tuffs (variable degrees of welding), and numerous fine ash to coarse polymictic pyroclastic tuffs. The sheared felsic volcanic-sedimentary contact contains up to 1.57 grams per tonne gold (obtained in grab sample collected in 1989).
During the 1990 field season of Granges Inc, tuffaceous and argillaceous sedimentary rocks were mapped and re-sampled. Up to 0.39 gram per tonne gold was detected in brecciated welded tuffs containing arsenopyrite mineralization (Assessment Report 20993). Results verified anomalous gold, silver and arsenic levels.
The U2 North showing is considered similar to the AP (Zone 1) prospect (104B 083); refer to the AP prospect for details of a common property work history.