This paper briefly describes the geology of the wollastonite skarn and examines some of the controls on skarn formation. The Mount Raven pluton is an equigranular hornblende diorite and the Seraphim Mountain pluton is an equigranular hornblende biotite granite. Five wollastonite skarn occurrences have been identified to date. Two of these, the Cliff and the Glacier deposits, were mapped and investigated during the 1995 field season. Five map units were identified within both deposits and defined on the basis of texture and relative abundances of accessory minerals.
Melanite garnet appears to replace pyroxene and wollastonite.
Centimeters wide melanite rinds wrap around small xenoliths of pyroxene-wollastonite skarn located on the western margin on the Glacier deposit. Pyroxene layers within pyroxene-wollastonite skarn appear to represent both original bedding and veins. In thin section, pyroxenes within pyroxene-rich layers consist of diopside cores surrounded and crosscut by rims of augite. B. Microveinlets of titanite crosscut pyroxene. Melanite-wollastonite skarn C. Titanite grains are embayed and surrounded by melanite.