The Tedi deposit is situated between Brandywine and Callaghan creeks in the Pacific Ranges of the Coast Crystalline Complex.

Andesitic volcanic rocks with minor thin-bedded siltstone of the Lower Cretaceous Gambier Group are preserved as a roof pendant within diorite of the Jurassic to Tertiary Coast Plutonic Complex. Both the diorite and volcanic rocks are intruded by felsite dykes.

Mineralization in the Tedi pit consists of pyrite, sphalerite, galena and chalcopyrite which occur as disseminations, narrow (less than 0.05 metres wide) veins and as massive bands which parallel foliation. Mineralization within the hosting andesite and diorite is discontinuous.

The main showings were initially staked in the 1920’s. Van Silver Explorations Limited staked the property and carried out some mineral exploration work around the Main Showing and Silver Tunnel (MINFILE 092JW 003) between 1965 and 1969. Between 1967 and 1969, Barkley Valley Mines optioned part of the property and conducted a drilling and pitting program in the area of the Tedi Pit. In 1969, Noranda Exploration optioned the property and completed soil geochemical, geophysical, and geological surveys over much of the property. The Tedi pit was mined in conjunction with the Silver Tunnel deposit in 1977 and recorded production for the years 1970 and 1978. In 1988, Placer Dome optioned the property and carried out geological, geochemical, and geophysical surveys in 1988 and 1989.

Production, from 1970 to 1978, totalled 10,385 tonnes of ore, yielding 717,069 grams of silver, 343,537 grams of gold, 12,943 kilograms of copper, 164,829 kilograms of lead and 159,857 kilograms zinc. In 1977, indicated reserves included 134,800 tonnes grading 85.7 grams per tonne silver, 1.03 grams per tonne gold, 0.65 per cent copper and 5 per cent combined lead-zinc (Northern Miner, February 24, 1977).

A sample taken from the North Pit over 4.5 metres assayed 1.6 grams per tonne gold, 150 grams per tonne silver, 1.71 per cent copper, 10.95 per cent lead and 14.08 per cent zinc (George Cross News Letter No. 209, 1991).

La Rock Mining Corporation drilled the Dave's Pond zone, 300 metres northeast of the Main zone (Tedi pit area), in 1993, 1995 and 1997. In 2010, Auramex Resource Corp. completed three vertical diamond drill holes, totalling 175.57 metres, on the zone.