The Tanzilla 3 occurrence is located about 27 kilometres southeast of the community of Dease Lake.
The area of the showings is underlain by an assemblage of Upper Triassic to Lower Jurassic volcanic and volcaniclastic rocks consisting of grey and maroon plagioclase porphyry, andesite, volcanic conglomerate, tuffaceous mudstone, breccia, rhyolite, minor siltstone and shale. The Middle to Late Jurassic Snowdrift Creek pluton occurs several kilometres to the northeast.
The S zone of the Tanzilla 3 occurrence is located at the southern end of a prominent north-trending ridge. The showing consists of trace to 1 per cent disseminated bornite and malachite within highly altered, carbonatized felsic volcanic rock. The zone is cut by narrow quartz-carbonate veinlets which contain up to 30 per cent bornite. A grab sample yielded 23.23 per cent copper, 493 grams per tonne silver and 3.02 grams per tonne gold (Assessment Report 22458). Trenching and channel sampling of the zone across 9 metres yielded an average grade of 0.75 per cent copper and 21.26 grams per tonne silver (Assessment Report 22458).
In 2005, a rock sample (station M15, sample B280968) of chalcopyrite in quartz stringers yielded greater than 10,000 parts per million copper and 57.6 grams per tonne silver (Assessment Report 28433).
Occurring about 500 metres east of the S zone on a ridge, are quartz veins mineralized with galena, tetrahedrite, chalcopyrite and sphalerite (Assessment Report 19269).
A number of mining companies conducted regional programs in the area in the 1960s and early 1970s, but no mention of these showings is recorded until 1989 and 1991. It appears that Cultus Exploration initially held title to the land as the A to L claims in 1965, performing over 2400 metres of bulldozer trenching in the vicinity (National Mineral Inventory 104I/5 MO2). The Owl claims of 1970 to 1971 lie to the immediate north (according to claim maps) but may in fact have covered the same ground. Considerable work was done on the Owl claims including five diamond-drill holes, however, exploration results were never documented. The ground was held as the Lotus claims in 1971 by Nittetsu Mining Co. Ltd. and some soil sampling was reported.
In 1989, Equity Silver Mines conducted substantial geophysical and geological work on their Thorn claims, part of which covered the showing area. In 1991, Akiko-Lori Gold prospected the Tanzilla claims and reported the S zone.
In 2003, the Tanzilla property owned by A. Travis was under option to Hyder Gold Inc. who completed an exploration program consisting of the collection of 28 silt and 19 rock samples along with prospecting and geological examinations. In 2005, on behalf of Western Keltic Mines Inc., a work program was directed towards a re-evaluation of the potential for the Tanzilla claims to host either porphyry-style mineralization and/or related high sulphidation epithermal mineralization. A total of 21 rock samples and 8 silt samples were collected and analyzed.
During 2011, 21.85 kilometres of induced polarization/resistivity survey were conducted on the Tanzilla-Pliny property on behalf of West Cirque Resources Ltd. In addition, 5.85 kilometres of ground magnetic survey were completed on the Pliny claims which covers the Crown showing (104I 046).
The Tanzilla property was acquired in April 2011 by West Cirque Resources Ltd. and covers the Tanzilla 1 (104I 022), Tanzilla 3 (104I 023), Thorn 75 (104I 102) and T-4 (104I 050) showings. In 2013, induced polarization, Terraspec, and structural surveys were conducted over the property. The Terraspec survey was undertaken to map the distribution of alteration minerals, particularly clay minerals, which can assist in defining zones of porphyry alteration and mineralization. The structural geology mapping program was conducted in order to identify structures that host porphyry-style alteration to assist in locating porphyry mineralization at depth. Two lines of induced polarization survey totalling 6.6 kilometres were conducted to further delineate the chargeability anomaly under Silica Ridge and to identify subsurface structure and resistivity signatures that might relate to zones of copper-gold porphyry mineralization.
In 2013, West Cirque Resources Ltd. signed an Earn-In Agreement with Freeport-McMoRan Corporation of Canada Limited to explore West Cirque’s Tanzilla and Pliny Properties. In June of 2014, West Cirque Resources Ltd. was acquired by Kaizen Discovery, and the option agreement with Freeport continued with Kaizen Discovery as the optionor. In 2014-15, Kaizen Discovery carried out a diamond drilling program totalling 3332 metres in eight holes. Seven holes were drilled on the Silica Ridge zone (104I 142) and one hole on the Gopher zone (104I 050).
