Several occurrences of talc-carbonate alteration have been reported by McCammon (1967), associated with the serpentinite belt on the southwest slopes of Mount Wright, 7 kilometres southeast of Greenwood. Access to the area is via the Goosmus Creek road that turns west from the Phoenix haulage road.

The serpentinite occurs in a northeast dipping thrust zone with mainly Knob Hill Group rocks on the hanging wall to the northeast and Attwood Group rocks and quartz and feldspar porphyry intrusions in the footwall to the southwest. The serpentinite is intensely sheared and mottled dark and light green with talc occurring on slip surfaces. On the Puyallup claim, at the headwaters of Goosmus Creek between Mount Wright and Rusty Mountain, an exploration trench dug by Lexington Mines (1969) cut through serpentinite exposing narrow lens of distinctive light blue talc.

To the east, south of Gibbs Creek, ultramafic rock is locally altered to talc (Little, 1983).