The Jet occurrence is located at an elevation of approximately 1580 metres on a south-facing slope, approximately 3 kilometres southeast of Mount Selwyn and 80 kilometres north of the town of Mackenzie.

Regionally, the area is underlain by lower Paleozoic platformal carbonates of the Ancestral North America terrane including the Silurian Nonda Formation, Silurian-Devonian Muncho-McConnell Formation, Lower and Middle Devonian Stone Formation and Middle Devonian Dunedin Formation carbonates and minor clastics, overlain by Besa River Formation shale, comprise a platformal sequence near a facies change to basinal shale. This southwest-dipping package is folded and faulted and divided by a prominent thrust fault.

The occurrence is hosted in dolomite breccia healed by coarse sparry dolomite. The breccia occurs at the contact between the Stone and Dunedin formations, but the irregular nature of this contact causes uncertainty as to which formation hosts the occurrence. Coarse galena, sphalerite, smithsonite, anglesite and hydrozincite are disseminated in the sparry dolomite matrix but are also found occasionally replacing the dolomite clasts.

In 1974 and 1975, chip samples (W74-634R and R75-010R) from outcrop yielded up to 4.70 and 0.83 per cent lead with 2.61 and 3.56 per cent zinc over 4.6 and 1.8 metres, respectively (Assessment Report 5643).

In 1976, drilling intercepts included 3.55, 2.45, 8.28 and 2.17 per cent lead over 5.4, 9.5, 6.5 and 7.5 metres in hole H3, H7, H11B and H14, respectively (Assessment Report 6028).

Work History

The occurrence was originally discovered in 1974 by Nick Wychopen as a result of follow-up work on a stream silt anomaly. A minor program of geological mapping and soil sampling was completed at this time. In 1975, Aquitaine Co. of Canada Ltd. completed a program of prospecting, geological mapping, geochemical (rock and soil) sampling and an induced polarization survey on the area as the Jet claims. The following year, Aquitane Co. completed a program of geological mapping and 22 short diamond drill holes, totalling 595.0 metres, on the claims.