FIG. 1. Simplified geologic map of the Thompson nickel belt (TNB) segment of the Superior boundary zone, showing the adjacent Reindeer zone of the Trans-Hudson orogen (Churchill province), the Superior province, and the northern edge of the Paleozoic cover. Within the TNB the names and locations of all known significant Ni-Cu deposits and properties are shown, as well as the locations of known serpentinized ultramafic bodies and early Proterozoic supracrustal sequences. The location of the U-Pb zircon sample from the southern end of the eastern arm of Setting Lake is indicated by the label W106-6.