The Attycelley occurrence is located at the southern end of the Toodoggone Gold Camp, south of Attycelley Creek, approximately 4.5 kilometres east of the northern end of Duncan Lake and 11 kilometres east of the northerly tip of Thutade Lake. Smithers is located approximately 250 kilometres to the south.

The Toodoggone district lies within the eastern margin of the Intermontane Belt and is underlain by a northwest-rending belt of Paleozoic to Paleogene sediments, volcanics and intrusions covering an area of 90 by 25 kilometres. The basement rocks are Proterozoic metasedimentary equivalents of the Hadrynian Ingenika Group. These rocks are unconformably overlain by volcanic and sedimentary units of the Devonian to Permian Asitka Group, which are in turn overlain by Upper Triassic basaltic to andesitic flows, volcaniclastics and minor limestone of the Stuhini Group. Volcaniclastic rocks of the Lower Jurassic Hazelton Group and rhyolitic to dacitic flows, intrusions and volcaniclastics of the Lower Jurassic Toodoggone Formation (Hazelton Group) overlie the Stuhini Group. Further to the west, nonmarine sediments of the Cretaceous Sustut Group overlie the volcanic strata and form the western margin of the district.

The Early Jurassic Black Lake Suite of quartz monzonitic to granodioritic composition have intruded the older strata in the central and eastern parts of the region and form the eastern margin of the Toodoggone district. Within the district, syenomonzonitic and quartz feldspar porphyritic dikes may be feeders to the Toodoggone Formation.

The dominant structures in the area are steeply dipping faults that define a prominent regional northwest structural fabric trending 140 to 170 degrees. High angle, northeast-striking faults (approximately 060 degrees) appear to truncate and displace northwest-striking faults. Collectively these faults form a boundary for variably rotated and tilted blocks underlain by monoclinal strata.

Locally, the area is underlain by augite porphyry basalt, dacite and andesite crystal and lapilli tuffs and flows, and augite crystal tuffs and ash tuffs of the Stuhini Group. To the northeast and east lie dacite lapilli and crystal tuffs and breccias, and andesite crystal tuffs of the Toodoggone Formation, which are interbedded with conglomerate, sandstone and siltstone. The Early Jurassic Kemess pluton, part of the Black Lake Suite, a monzonite intrusive body, outcrops to the south.

The Attycelley occurrence consists of a set of large adularia-sericite type epithermal quartz veins, which are partially exposed on a ridge top. The veins have a strike length of at least 350 metres. The apparent width of the veins is observed in exposures on the east and west slopes of the ridge. The south vein strikes 270 degrees and the north vein strikes 280 degrees. The width of the main vein is at least 3 metres. The veins consist of massive to medium grained, grey to white quartz with associated galena, sphalerite, chalcopyrite, pyrite and barite. Minor silicification of the wallrock is associated with quartz veining. A pyritic alteration zone, up to 1 centimetre wide, is locally observed along vein margins.

In 1977, three rock samples (91929, 91926 and 91928) of mineralized quartz vein material yielded values from 0.20 to 0.47 per cent copper, 0.61 to 4.20 per cent lead, 0.51 to 3.10 per cent zinc, 20.9 to 63.3 grams per tonne silver, and 0.07 to 2.05 grams per tonne gold, whereas a sample of gossanous material to the west yielded 0.34 per cent copper, 12.10 per cent lead, 6.30 per cent zinc, 171.3 grams per tonne silver and 0.4 gram per tonne gold (Assessment Report 6650).

In 1981, a grab sample (53885) of select vein material yielded 2.65 per cent lead, 101.5 grams per tonne silver, 0.69 per cent zinc, 0.34 per cent copper and 0.035 gram per tonne gold (Assessment Report 10113).

In 1990, extensive sampling was conducted on the veins, with results indicating extensive anomalous mineralization in both quartz veins and host volcanic rocks. A 1.0-metre-long sample (Att-90-011) of shattered quartz vein material assayed 30.70 grams per tonne silver, 0.01 gram per tonne gold, 3.40 per cent zinc, 2.50 per cent lead and 0.407 per cent copper, whereas a 0.5-metre-long sample (Att-90-008) of host volcanics with jarosite assayed 268.0 grams per tonne silver, 0.22 gram per tonne gold, 14.6 per cent lead, 2.55 per cent zinc and 0.433 per cent copper; both of these samples were from the west zone (Assessment Report 21059). Sampling of the east zone yielded up to 0.45 gram per tonne gold, 201.0 grams per tonne silver, 0.94 per cent copper, 0.46 per cent lead and 0.27 per cent zinc over 1.0 metre of shattered and oxidized quartz vein material (sample Att-90-22; Assessment Report 21059).

In 2015, a rock sample (WG15-13) assayed 0.15 gram per tonne gold, 73 grams per tonne silver, 0.58 per cent copper and greater than 1 per cent each of zinc and lead (Assessment Report 35865).

The area was originally staked by D.W. Chisholm in 1929 as the Fokker mineral claim.

During 1969 through 1973, Kennco Explorations Ltd. completed programs of prospecting and soil sampling on the area as the Attycelley 1-6 claims. In 1977, Bishop Mines Ltd. completed a program of rock and soil sampling and a 2.0 line kilometre ground magnetic and electromagnetic survey on the area as the Audrey property.

In 1980, ABM Mining Corp. completed a 69.8 line kilometre airborne magnetic and electromagnetic survey on the area as the Audrey 1, 2, East and West claims and Kem 1-9 claims. Also at this time, Inca Resources Inc. completed a program of soil sampling and a ground electromagnetic survey on the claims. In 1981, Texasgulf Inc., on behalf of Inca Resources, completed a program of geological mapping and rock sampling on the Audrey and Kem claims. In 1982, Kidd Creek Mines Ltd. completed a program of geological mapping, trenching and rock sampling.

During 1990 through 1999, Electrum Resource Corp. conducted programs of prospecting, geochemical (rock, silt and soil) sampling, geological mapping and a 4.7 line kilometre ground magnetic and electromagnetic (VLF) survey on the area as the At 1-2 and Atty 3-7 claims.

During 2000 through 2004, Finlay Minerals Ltd., conducted programs of rock, silt and soil sampling, geological mapping and ground induced polarization (IP) and magnetic surveying on the area.

During 2013 through 2016, Finlay Minerals conducted further programs of prospecting and geochemical (rock and soil) sampling and a LiDAR survey on the Atty property. In March of 2018, Serengeti Resources Inc. signed an option agreement to acquire a 100% interest in the Atty and ATG properties from Finlay Minerals Ltd. and Electrum Resource Corp., respectively. In 2018, Serengeti Resources Inc. conducted a program of rock sampling, core re-logging and sampling, geological mapping and a 20.0 line kilometre ground IP survey on the area as the ATTY-ATG property. The property covers eight occurrences: 094E 022, Awesome (81), Fog 1 (115), Fog 2 (116), Fog 3 (117), Kem 6 (119), New Mess 1 (120), and Wrich 1 (122). During the months of June, July and August 2019, Serengeti conducted a broad exploration program on the ATTY property in order to follow up on drill core re-logging and sampling, mapping and geophysics completed in 2018. The 2019 program included 30.8 line kilometres of ground-based IP surveys in two phases and a diamond drilling program of 2318 metres in six drillholes.