Abstract:

The McFaulds Lake greenstone belt, in addition to its world-class chromite endowment, also hosts significant magmatic<br/>Ni-Cu-(PGE) mineralization at the Eagle’s Nest deposit. Mineralization at Eagle’s Nest occurs in a dynamic<br/>system that contains multiple generations of sulphide textures, consistent with its interpretation as a magmatic feeder<br/>among a network of ultramafic intrusions. Massive sulphides and abundant leopard net-textured, oikocrystic nettextured,<br/>and inclusion net-textured sulphide mineralization formed first and were consolidated enough to be crosscut<br/>by late-stage pyroxenite, creating disrupted net-textured sulphide and minor late-segregating massive/semimassive<br/>sulphide melts. Resolving the fundamental characteristics and genesis of mineralization at Eagle’s Nest will<br/>provide critical information about the evolution of large chromium and Ni-Cu-PGE ore systems associated with Archean<br/>komatiitic magmatism within the Superior Province.