Magnetic signature of magnetite-enriched rocks hosting platinum-group element mineralization within the Archean Boston Creek Flow, Ontario

Abstract Ground-based magnetometer surveys detect high-positive magnetic anomalies (up to 72 000 nT) which coincide with the location of subeconomic, magnetite-associated platinum-group element (PGE) mineralization within the Boston Creek Flow iron-rich basalt, Archean Abitibi Greenstone Belt, Ontario. The magnetic anomalies confirm the presence of magnetite-enriched zones (up to 20 modal%), and reveal that they are ovoid in shape, up to 10 m …