The Atlin Project (Main Block) occurrence is located in the lower reaches of Otter Creek where it empties into Surprise Lake, about 18 kilometres east of the community of Atlin.

The area is underlain by upper Mississippian to Permian Cache Creek Complex ultramafic rocks that are tectonically superimposed over a lower and lithologically diverse sequence of steeply to moderately dipping, tectonically intercalated slices of chert and argillite of the Mississippian to Triassic Kedahda Formation (Cache Creek Complex) with tectonized pods and slivers of metabasalt of the upper Mississippian to Permian Nakina Formation (Cache Creek Complex).

Four lithologic units were intersected in drilling in 2007. Unit 1 is a largely serpentinized section consisting of serpentinized ultramafic to mafic rocks made up of serpentinite, mafic to intermediate volcanic or subvolcanic rock (andesite and/or basalt) plus diabase dikes. Unit 2 is a greenstone body that varies from pale to dark green to blackish green and is thought to be of andesitic to basaltic composition. Unit 3 is a zone of dark grey to blackish chert and argillite cut by quartz veins and stringers. Unit 4 is a pale grey zone of diabase/basalt to andesite/diorite. The best intersection in drillhole BC-07-04 is where a quartz vein from 163.42 to 166.21 metres contained visible gold. Two adjacent intervals of the vein assayed 11.1 grams per tonne gold over 0.79 metre and 1.57 grams per tonne gold over 1 metre (Assessment Report 30042).

In 2007, Blind Creek Resources Ltd. conducted a program of Mobile Metal Ion (MMI) geochemical soil sampling and diamond drilling along the lower reaches of Otter Creek. A total of 596 samples were collected on two nearby grids. Drilling consisted of seven holes (three did not reach bedrock) totalling 744.6 metres.