The Moon Lake (Carbonate) showing is located 40 kilometres south of Carcross, Yukon Territory at the southeast end of Tutshi Lake near Moon Lake. The area is underlain by Devonian to Triassic greenschist facies rocks of the Boundary Ranges Metamorphic Suite (Stikine terrane), Upper Triassic Stuhini Group congomerates and coarse clastic sedmentary rocks, basaltic rocks, volcaniclastics and limestone, and Lower Jurassic Laberge Group sediments. These have been intruded by Late Cretaceous Coast Plutonic Complex granites, and Triassic to Jurassic Coast Plutonic Complex granitoid intrusions along the Kink Salmon fault. These granitoid intrusions occur a few hundred metres west of the Camp occurrence.

Rocks in the Carbonate zone area are dark green mafic volcanics that have undergone extensive carbonatization imparting an orange-brown coloration to the rocks. The rusty brown colour of many of the carbonate veins and stringers suggests that at least part of the carbonate is composed of ankerite and/or siderite. The volcanic rock is presumed to be basalt and it has been pervasively chloritized, and fuchsite/mariposite are observed rarely. Overlying the intensely altered mafic volcanic rock is a maroon to green tuff breccia, which are overlain in turn by a thin shale/limestone horizon, a thick sequence of epiclastic sediments and an intermediate volcanic unit. Intruding the zone are rhyolite dikes which may be related to the alteration and mineralization. Copper mineralization was observed at one local area.

In the Carbonate zone, disseminated arsenopyrite, pyrite, galena and sphalerite occur in quartz-carbonate altered Stuhini volcanics. A grab sample of quartz vein material with tetrahedrite assayed 490 grams per tonne silver, 1.39 per cent lead, 0.26 per cent zinc, 0.096 per cent copper, 1.37 per cent arsenic and 0.3 grams per tonne gold (Fieldwork 1985).

The Tut claims were staked in 1986 and 1987 by Noranda to cover a large alteration zone and the source areas for gold-bearing float. The claims cover several old showings known as the Jessie/Great Northern (104M 027) and Big Thing (104M 071). An extensive geophysical and geochemical program, conducted in 1987, outlined two areas of interest (the Camp, 104M 090 and Carbonate zones).

In 2006, three diamond drill holes were completed on the Carbonate zone yielding intercepts of up to 2.64 grams per tonne gold over 3.1 metres in hole GE06-04 (Aurora Geosciences Ltd. (2012-07-09): Technical Report – Golden Eagle Property).

See MINFILE occurrence Camp (104M 090) for further details of the region’s history.