The Moonlight Glacier 1 showing is located on the north side of Moonlight Glacier, about 1 kilometre west of American Creek, 32 kilometres north of Stewart. The Moonlight Glacier is a tongue that extends eastward from the Betty Glacier, about 15 kilometres north of the confluence of American Creek with the Bear River.

The area is underlain by north-northeast trending, west dipping Lower Jurassic rocks of the Unuk River Formation (Hazelton Group). These lie on the west limb of the American Creek anticline (Bulletin 58; 63). Lithic greywacke and volcanic breccia are intruded by northwest trending dacitic dikes.

The showing consists of a 20 to 40 metre wide zone containing 20 to 30 per cent quartz as veinlets, 1 to 10 centimetres wide, forming stockworks. Mineralization consists of 3 to 5 per cent chlorite, 3 to 5 per cent pyrite and trace to 1 per cent chalcopyrite. Samples assayed up to 504.5 grams per tonne silver, 0.28 gram per tonne gold and 0.26 per cent copper across 1 metre; negligible lead and zinc values were reported (Assessment Report 19746).

Showings on the Bryant 7 and Dundee 8 claims may lie close to the Moonlight Glacier 1 showing; their exact locations are not known. On the Bryant 7 claim, at 1280 metres elevation, a siliceous replacement zone is mineralized with stringers and veinlets of sphalerite and minor galena. A grab sample assayed trace gold and silver.

About 300 metres farther northeast a pyritized porphyry assayed 0.7 gram per tonne gold and 9.6 grams per tonne silver (Minister of Mines Annual Report 1930, page 110). On the Dundee 8 claim, galena occurs in the hangingwall and in cross veinlets of a carbonate tuff bed (Minister of Mines Annual Report 1930, page 110).

The early history of the showing is unknown. It may have been covered by the Camp, BLK, Bryant and Dundee claim groups staked by Bryant, Little and Kimball in 1929. In 1988, D. Cremonese conducted a heli-borne VLF-EM and magnetometer survey over the area. In 1989, White Channel Resources Inc. carried out a program of geological mapping, prospecting and sampling, silt and soil geochemical surveys, ground VLF-EM and magnetometer surveys on the Rich 1-4 claims. Trenching was done on the showing on the Rich 3 claim. There are two other showings on the Rich 3 claim: the Moonlight Glacier 2 (104A 121) and the Moonlight Glacier 3 (104A 122). In 1992, White Channel Resources Inc. carried out a program of geological mapping, linecutting and VLF-EM and magnetometer surveying to assess the mineral potential of the upper Moonlight Glacier. Two grids were established over mineralized areas.