Analyses show it to be devoid of any nickle minerals. Prospects were dug in a vein which was traced 8 feet below the surface, where it openned into a zone 41 feet wide. The basal member consists of metamorphosed massive lava flows and volcanoclastic sediments. The middle member is mostly metamorphosed sandstones. It is particularly common in the footwall stockwork zone where it is associated with chalcopyrite, pyrite and magnetite.
Significant pyrrhotite occurs in sec.
Pyrrhotite is a minor component of the massive sulfide ore at the Flambeau Mine, near Ladysmith. It occurs intergrown with pyrite, chalcopyrite and sphalerite. Small bronzy to silvery magnetic xls.