Early Proterozoic rift related mafic and ultramafic intrusive rocks are prospective for PGE-Ni-Cu deposits in the Lake Nipigon region as exemplified by the many occurrences or deposits discovered ie.

Source: https://investingnews.com/conquest-continues-search-for-critical-metals-at-marr-lake-pge-cu-ni-property/

No fresh pyrite was visible in the core however, except occasionally below the FW vein in the underlying Proterozoic granite.

Source: https://thegrizzlygazette.com/media-release/arizona-silver-confirms-down-dip-extension-of-high-grade-veins-new-vein-identified-at-philadelphia-project-mohave-county-arizona/