The Tonka 1-2 occurrence is located on the northern end of Tonka Lake, approximately 3.7 kilometres north of the northern shore of White Eye Lake.

The area is underlain by Upper Cretaceous Kasalka Group andesite flows and minor tuff. A small stock of monzonite intrudes the andesite to the east.

Locally, a zone of brecciated, silicified and quartz-veined andesite occurs. The quartz stock work zone is accompanied by a halo of pyritized and bleached andesite, followed by an outer alteration zone of calcite veined andesite, 50 to 75 metres wide. Mineralization consists of up to 5 per cent disseminated pyrite and minor arsenopyrite.

In 1988 and 1989, Mingold Resources staked the Tonka claims as a result of a reconnaissance prospecting and sampling program. Sampling of the zone returned values up to 1.0 gram per tonne gold and 7.2 grams per tonne silver (Assessment Report 19141). In 1994, Cogema Resources acquired the Tonka property and completed a program of bedrock mapping, prospecting and till sampling. Sampling returned values up to 500 parts per billion gold and 304 grams per tonne silver (Assessment Report 23750). In 1995, the Phelps Dodge Corporation completed a program of geological mapping, prospecting and rock sampling.

In 2006, Goldmember Ventures acquired the area as a part of their Nechako group and through 2008 completed a program of regional geophysical surveys. Goldmember also completed a 4 hole drill program in the Tonka area where holes intersected felsic volcanic sequences comprising dacite and/or rhyolite separated by sedimentary assemblages indicative of shallow to deep-water environment. The best intercept was from Hole NEC-08-01 where a 6.90 metre intercept graded 0.113 gram per tonne gold and 17.35 grams per tonne silver from 157.10 to 164.00 metres depth (Assessment Report 30364).