The Wisner properties in Sudbury are being explored for copper and PGMs as part of the NRJV with Lonmin Canada Inc. They include several high-grade Cu-PGM occurrences and over 12 identified exploration targets within a 10 kilometre long prospective belt of geology surrounding Wallbridge's Broken Hammer Cu-PGM open pit project (in closure state) and adjacent to several Ni-Cu-PGM deposits owned by Vale and Glencore. 

Distributed throughout all the Wisner properties are irregular bodies of Sudbury Breccia, which is the main host rock for footwall-style Cu-Ni-PGM mineralization (i.e. Broken Hammer deposit, Southwest and South Zones, and the Twisted Wrench Zone). 

Broken Hammer Operation (excluded from JV)

Wallbridge discovered the Broken Hammer deposit in 2003. Based on the positive results from its drilling campaigns (2003-06) and bulk sample of 30,000 tonne (2011), Wallbridge initiated a pre-feasibility study and received all required permits for the operation of its Broken Hammer open pit project in 2014. The Broken Hammer open pit project achieved full production in August 2014. During 2014 and 2015, 295,000 tonnes of ore with average grades of 0.89% Cu, 2.08 g/t Pt, 1.52 g/t Pd, and 0.50 g/t Au was mined from the open pit and processed at the mill. Wallbridge completed mining the Broken Hammer deposit in October 2015.

Southwest and South Zones

The Southwest and South zones define a 1.5-kilometre trend of surface Cu-PGM occurrences and broad coincident IP anomalies. At the Southwest zone, drilling has traced mineralization 600 metres along strike and to 120 metres depth. Drilling highlights include 0.5 m of 26.69 g/t Pt+Pd+Au, 2.35% Cu and 1.25% Ni from 65.5 to 66.0 m (WIS-078), 13.7 m of 0.99 g/t Pt+Pd+Au, 0.11% Cu and 0.04% Ni from 109.8 to 123.5m (WIS-078), and 1.9 m of 2.23 g/t Pt+Pd+Au, 7.87% Cu and 0.12% Ni from 27.1 to 29.0m (WIS-088). 

Work in 2012 extended the Southwest Zone 80 metres to the northeast along an IP geophysical anomaly. Highlights from this program included grab samples of 3.90% Cu with 6.62 g/t Pt+Pd+Au, 2.84% Cu with 4.34 g/t Pt+Pd+Au, and 2.81% Cu with 3.96 g/t Pt+Pd+Au; and channel sample of 1.28 m containing 1.35% Cu with 3.90 g/t Pt+Pd+Au, 1.99 m containing 0.71% Cu with 2.40 g/t Pt+Pd+Au, and 0.16 m containing 5.59% Cu with 5.39 g/t Pt+Pd+Au. 

In 2014, further trenching and channel sampling was carried out in an area between previous showings, connecting the known Cu-PGM mineralization for the entire 600 metre strike length. Drilling tested shallow (<200m) depths along strike, below the surface showings, and the host Sudbury breccia structure. In 2015, three additional drill holes tested the zone to approximately 500 metres. The known near-surface mineralization is discontinuous and narrow, and the mineralization intersected between 200 and 500 metres had anomalous copper but no significant Pt, Pd, or Au. Several holes tested the potential western extent across the Rapid River fault with WIS-208 intersecting 0.55 m of 0.34% Cu.

In the South Zone, grab and channel samples collected assayed up to 25.50% Cu and 151.95 g/t Pt+Pd+Au. One drill hole intersected 3.35 m of 2.30 g/t Pt+Pd+Au, 0.18% Cu and 0.05% Ni from 5.00 to 8.35 m (WIS-004). Drilling in 2014 tested open Cu-PGM trends near-surface and failed to intersect further mineralization. The host Sudbury breccia structure was drilled with a few holes along strike to moderate (200-300 metres) depths. 

Twisted Wrench Zone

Drilling in 2014 discovered a new Cu-PGM zone in the Twisted Wrench area of the Wisner Glencore JV East Block. Encouraging results in holes WIS-161 and WIS-163 were followed up by trenching, channel sampling as well as prospecting in the vicinity of the drill holes. Channel sampling at the surface showing returned 8.12 g/t Pt+Pd+Au, 0.96% Cu and 0.16% Ni over 2.43 m. Hole WIS-179 intersected 1.65 g/t Pt+Pd+Au, 0.71% Cu and 0.15% Ni over 3.90 m, approximately 55 metres west of this trench. 

The field work resulted in the discovery of another showing 120 metres to the northwest. Channel sample highlights from this showing include 12.54 g/t Pt+Pd+Au, 3.95% Cu and 0.42% Ni over 0.62 m and 3.82 g/t Pt+Pd+Au, 2.76% Cu and 0.21% Ni over 0.66 m. Hole WIS-181 drilled below this trench intersected 3.49 g/t Pt+Pd+Au, 0.91% Cu and 0.26% Ni over 2.39 m. 

Drilling has traced mineralization down to 120 metres. Several deeper holes did target the extension of the mineralization below the zone, along the brecciated contact of the Wisner Gabbro and Levack Gneiss but failed to locate mineralization at greater depth.