The Willow Creek occurrence is located at the headwaters of Willow Creek (Assessment Report 4855).

The regional geology is similar to that of the Tie occurrence (094D 089). The showing is located on the south limb of a westward trending anticline. This fold occurs entirely within the Upper Triassic Dewar Formation (Takla Group). The host rocks are andesitic tuffs and tuffaceous argillites, generally striking 165 degrees and dipping 20 degrees to the west.

Mineralization consists of sphalerite, chalcopyrite and galena hosted in several calcite and quartz veins. A 0.3-metre-wide vein (traceable for approximately 91 metres) strikes 165 degrees and dips 80 degrees to the south. Locally, this vein contains up to 20 per cent sulphides (Geological Survey of Canada Memoir 251, page 63). No mineralization was observed in the country rocks. A selected sample assayed 0.09 gram per tonne gold, 5.66 grams per tonne silver, 0.06 per cent copper, 0.02 per cent lead, and 9.95 per cent zinc (Geological Survey of Canada Memoir 251).

The zinc showing, as described by Lord (GSC Memoir 251, page 63) occurs mainly in the area of Rio Tinto 1973 samples 06111 and 06112, with other minor veins at 06050 and 06051. As described in Rio Tinto's Assessment Report 4855: "Fine grained, thinly bedded andesitic tuff of the Lower Takla is cut by several calcite and quartz veins averaging 20 centimetres in width. These veins have irregular, but sharp, contacts with the country rock. A typical low-grade vein contains 2 per cent sphalerite as blebs up to 5 millimetres and .02 per cent chalcopyrite as patches up to 2 mm diameter on minor fractures within the vein. One contained 0.5 per cent galena as blebs up to 6 millimetres in diameter. A higher-grade vein contained 10 per cent sphalerite as lenses 3 centimetres by 1 centimetre, elongate sub-paralle1 to the vein, and 0.01 per cent chalcopyrite as grains to 0.5 millimetre at the margins of the sphalerite lenses. Four veins were examined at the top of the ridge, and four at the bottom. There are up to a dozen more in less accessible spots, that haven't been examined, although material seen in the talus indicates they are of a similar nature. No trace of mineralization was seen in the country rock."

WORK HISTORY

Rio Tinto Canadian Exploration held the property in the early 1970s as the "A" claim group when a detailed sampling and mapping program, supported by trenching and diamond drilling was conducted. In 1973, a total of 2498 soil and 23 rock samples were taken (Assessment Report 4855). Two drill holes were completed on the A462 occurrence (104D 102) in 1974 (Assessment Report 5402). In January 1974, a combined airborne magnetic and electromagnetic survey totaling 640 kilometres was completed over the 'A' claim group (Assessment Report 4921). Several high conductivity anomalies on the claims were recommended for follow-up. The Willow Creek occurrence appears to be just southwest of the southwestern extent of the aeromag survey lines which were flown northwest-southeast.