The Stone-Hinge showing is one of numerous zinc-lead showings located in the upper Richards Creek valley.

Regionally, the Richards Creek valley is underlain by a conformable sequence of Lower to Middle Devonian Stone Formation dolomite, Middle Devonian Dunedin Formation micritic limestone and Devonian to Carboniferous Besa River Formation shale. This sequence is overthrust by a panel of Stone Formation and Dunedin Formation strata, which is in turn overthrust by package of Cambrian to Ordovician Kechika Group, Ordovician Skoki Formation and Silurian Nonda Formation rock.

The showing occurs at the hinge of a south-plunging anticline within the thrust panel of the Stone Formation, near a thrust contact with the underlying Dunedin Formation. The mineralization; pods and veins of massive pyrite, marcasite, galena and sphalerite; differs from other Richards Creek showings (MINFILE 094) hosted in the Stone Formation in that galena predominates over sphalerite. The mineralization is fracture controlled and appears to be partly open-space filling and partly replacement. Calcite- and quartz-filled cavities in the dolomite are spatially related to the mineralization.

Work History

In 1972 and 1973, Cominco Ltd. completed programs of geological mapping, geochemical sampling and at least 16 diamond drill holes, totalling 952.2 metres, on the area as the Ric claims. No assays were reported. In 2008, Douglas Herriott prospected and sampled the area as the Red Cat property. No assays were reported.