The Tyber occurrence is located on the south eastern slopes of Mount Arrowsmith, approximately 1.4 kilometres south of Arrowsmith Lake.

The area is underlain by Upper Triassic Karmutsen Formation (Vancouver Group) volcanic rocks consisting of andesitic to basaltic amygdaloidal and porphyritic massive flows, pillow breccia, minor tuff and a few thin interlava limestones. The stratigraphy is nearly flat-lying and is cut by at least one regional fault and by numerous fracture and shear zones.

The occurrence area contains a number of separate but genetically related quartz vein systems hosted in shear and fracture zones. The vein systems vary in character from anastomosing to lensoidal and en echelon and range from hairline to approximately 1.5 metres in width. They are traceable in adits and on the surface for lengths from less than a metre to tens of metres. The gangue consists of mainly quartz matrix with wallrock fragments and varied amounts of carbonate.

Mineralization is predominantly pyrite and/or chalcopyrite with locally abundant sphalerite and widely scattered pods of chalcocite. Locally galena is significant and pyrrhotite, arsenopyrite, magnetite and bornite have been observed. The sulphide mineralization is spotty, occurring in small massive pods and in clusters of aggregates of grains with zones that are pyrite-rich, chalcopyrite-rich or sphalerite-rich.

In 1980, E. Stevens prospected the area. The following year, Tyber Resources completed a program soil sampling and ground magnetic surveys. In 1986, a program of geochemical sampling was completed by E. Stevens and K. Northcote. The highest assays from channel samples taken across veins and wallrock contained 16 per cent copper, 3.84 per cent zinc, 402.4 grams per tonne silver, 0.51 per cent lead and 0.1 grams per tonne gold (Assessment Report 15171).

Previous workings included several open cuts and two adits.