The advanced-stage Risby tungsten deposit is scheelite-bearing skarn occurrence in the Ross River area, Yukon accessible by a 25 km tractor road from an all-weather highway. The property is located approximately 55 kilometres west of Ross River, Yukon, Canada and is comprised of 38 quartz mineral claims, all 100% owned by Playfair Mining. The property is underlain by lower Paleozoic sedimentary rocks that have been intruded by Cretaceous age biotite-quartz monzonite. The intrusive activity has produced skarn mineralization, principally tungsten skarn with lesser copper and molybdenite mineralization also observed. The principle tungsten target is two tungsten skarn horizons, the upper and lower skarn horizons, both of which occur close to and paralleling the quartz monzonite contact. Scheelite is the primary tungsten mineral.
The property was worked on from 1968 to 1982 by the Caltor Syndicate and Hudson Bay Exploration and Development Co. Ltd. Together their exploration efforts include 48 diamond drill holes (7,057 metres), geological mapping, trenching, stream sediment sampling and ground geophysics (magnetometer and EM surveys). Recent work by Playfair includes diamond drilling, resource expansion and a NI 43-101 compliant inferred resource calculation of 8,537,000 tonnes of 0.475% WO3 at a 0.2% cut-off.