FIG. 5. Ternary diagram showing restricted composition of PGM- and PGE-bearing gersdorffite grains. Po-ccp (PGE-rich): PGE- or PGM-bearing euhedral gersdorffite within the pyrrhotite-chalcopyrite assemblage: Po-ccp: euhedral gersdorffite within the pyrrhotite-chalcopyrite assemblage; Nc-gf (euhedral): euhedral gersdorffite within the niccolite-gersdorffite assemblage; Nc-gf (rims): gersdorffite rims and overgrowths within the niccolite-gersdorffite assemblage. Temperature data after Klemm (1965).