The East Creek occurrence area is underlain by sedimentary rocks of the Upper Triassic Stuhini Group. Basalts of the Tertiary to Quaternary Mount Edziza Complex cap the Stuhini rocks to the west.

Prospecting within an area near the mouth of East Creek that contained a gold occurrence found by Moongold Resources in 1989 resulted in the discovery of the East Creek Gold zone. Gold mineralization is hosted in a strong 015 degree trending steeply dipping siliceous shear zone that contains zones of massive pyrite, chalcopyrite, sphalerite and arsenopyrite. A chip sample taken across the zone in 1991 assayed 58.46 grams per tonne gold over 2.6 metres (Assessment Report 22838). The shear averages over 5 metres in width and can be traced to the northwest across East Creek where Moongold obtained values of 7.9 grams per tonne gold over 1.9 metres. Similar values were obtained by Columbia Gold Mines in 1991. Approximately 400 metres to the northwest of the original showing, sampling of similar mineralization yielded 11.6 grams per tonne gold over 2.5 metres (Assessment Report 22838, page 18). In 1992, the East Creek Zone was drill tested by three diamond drill holes. The best result from this drilling was in hole S92-87 where 2.5 metres graded 34.45 grams per tonne gold and 0.5 per cent copper from massive pyrrhotite-pyrite-arsenopyrite-chalcopyrite-sphalerite veining; the other two holes intersected the zone but yielded low gold grades associated with narrow quartz-arsenopyrite veining (Assessment Report 22838).

In 2015, Skeena prospectors collected three outcrop samples that exceeded 20 grams per tonne gold 170 metres north of the drilled area. In 2016, Skeena further the examined the geological setting of the East Creek Zone. The area is underlain by relatively flat lying, fine grained hornfelsed Stuhini sediments. The 2015 samples lie within a 15 to 20 metre wide north-south to north 20 degree east-trending shear and sericite-pyrite alteration zone dipping steeply to the west. Within the shear zone, the 2015 samples collected are representative of less than 10-centimetre-wide discontinuous quartz-pyrite-arsenopyrite-sphalerite-galena veins that trend obliquely to the shear zone at 130 to 150 degrees dipping at greater than 80 degrees to the southwest. Additional narrow discontinuous quartz-arsenopyrite veining was sampled from this area in 2016 yielded 5.52 to 9.69 grams per tonne gold (Assessment Report 36675). Samples of adjacent host rocks to the quartz-arsenopyrite veining do not show any gold enrichment and very weak arsenic and antimony enrichment.

Refer to Spectrum (104G 036) for details of a common property work history.