The Superior graphite occurrence is located on Hoder Creek, approximately 22 kilometres south west of Slocan. The Crystal Graphite (MINFILE 082FNW260) occurrence is located, 6 to 7 kilometres, to the north.
The area is underlain by the Valhalla Metamorphic Core Complex. This consists of amphibolite grade or higher paragneisses with some calc-silicate rocks and marble. Also present are augen gneiss and granitoid gneiss.
On the property, a sequence of quartz-biotite schists, amphibolite, augen gneiss, marble and calc-silicate rocks occur. In general, these rocks are flat lying or westerly shallow dipping. Pegmatite occurs as lenses of variable sizes throughout this sequence. Intruding these rocks along the western margin of the property is quartz monzonite. Locally, graphite occurs in stratiform lens- shaped or saddle-shaped deposits.
In 1996 and 1997, the Superior claims were staked by prospector Horst Klassen, who in turn optioned the property to International Mineral Resources Ltd. and its successor Worldwide Graphite Producers Ltd. in 1998. A band of marble and calc-silicate rocks containing significant amounts of graphite was discovered in the Main Zone. In 2000, VLF-EM surveys and twenty hand trenches were completed in the vicinity of the Main Zone. Additional exploration was performed in 2002, including the staking of the Koch claims. In 2004, an exploration program of prospecting, sampling, reconnaissance mapping and metallurgical testing of a bulk sample was completed.
In 1998, samples, totalling approximately 100 kilograms, were collected from the Main Zone and sent to Lakefield Research for metallurgical study. Bench scale testing showed that 75 per cent of the graphite in the original feed was recovered in the +48 and in the 48+100 mesh products and a concentration containing 95.5 per cent graphite was produced.
In 1999, a drill program consisting of nine holes, totalling 1331.45 metres, was completed in the Main Zone area. This program covered a strike length of 350 metres and six of the nine holes drilled intersected significant graphite- bearing intervals, over widths of 45 to 60 metres.
Using results from 1999 drilling, a graphite resource of 3.4 million tonnes at 1.4 per cent graphite was calculated, assuming that mining would be done by open- pit (Assessment Report 26272). This calculation was updated assuming that mining would be done by benching and selective mining. The graphite resource for the Main Zone was now estimated to be 2.7 million tonnes with a grade of 2.07 per cent graphite. An additional 112,000 tonnes grading 1.45 per cent graphite was contained in the Footwall Zone below three postulated faults, probably in quartz-biotite schist (Assessment Report 26566).
In 2004, the Amar Zone was discovered and sampled. The zone is hosted in a quartz-biotite schist exposed in a creek bed for over 20 metres. Graphite occurs as finely crystalline flakes, comprising 5 to 10 per cent by volume of the country rock (Assessment Report 27727).