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TitleSulphide textural variations and multiphase ore emplacement in the Eagle's Nest Ni-Cu-(PGE) deposit, McFaulds Lake Greenstone Belt, Ontario
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AuthorZuccarelli, N; Lesher, C M; Houlé, M G
SourceTargeted Geoscience Initiative: 2017 report of activities, volume 2; by Rogers, N (ed.); Geological Survey of Canada, Open File 8373, 2018 p. 29-34, https://doi.org/10.4095/306598 (Open Access)
Year2018
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
RelatedThis publication is contained in Rogers, N; (2018). Targeted Geoscience Initiative: 2017 report of activities, volume 2, Geological Survey of Canada, Open File 8373
File formatpdf
ProvinceOntario
NTS43D/09; 43D/16
AreaRing of Fire
Lat/Long WENS -86.4069 -86.1119 52.7983 52.7064
Subjectseconomic geology; mineral deposits; nickel; copper; chromium; volcanogenic deposits; sulphide deposits; ore mineral genesis; mineralization; greenstone belts; tectonic evolution; emplacement; magmatism; intrusions; dykes; metamorphism; foliation; bedrock geology; lithology; igneous rocks; intrusive rocks; ultramafic rocks; pyroxenites; komatiites; tonalites; granodiorites; gabbros; metamorphic rocks; metasedimentary rocks; metavolcanic rocks; chromite; structural features; faults; textural analyses; petrogenesis; drill core analyses; mineral assemblages; Archean; Eagle's Nest Deposit; Double Eagle Intrusive Complex; Black Thor Intrusive Complex; McFaulds Lake Greenstone Belt; Superior Province; ore systems approach; platinum group elements (PGE); volcanogenic massive sulphide deposits (VMS); dyke swarms; Precambrian; Proterozoic
Illustrationslocation maps; geoscientific sketch maps; tables; photographs; photomicrographs
ProgramKnowledge Management Coordination, Targeted Geoscience Initiative (TGI-5)
ProgramNickel-copper-PGE-chromium systems, Targeted Geoscience Initiative (TGI-5)
Released2018 03 01
AbstractThe McFaulds Lake greenstone belt, in addition to its world-class chromite endowment, also hosts significant magmatic Ni-Cu-(PGE) mineralization at the Eagle's Nest deposit. Mineralization at Eagle's Nest occurs in a dynamic system that contains multiple generations of sulphide textures, consistent with its interpretation as a magmatic feeder among a network of ultramafic intrusions. Massive sulphides and abundant leopard net-textured, oikocrystic net-textured, and inclusion net-textured sulphide mineralization formed first and were consolidated enough to be cross-cut by late-stage pyroxenite, creating disrupted net-textured sulphide and minor late-segregating massive/semi-massive sulphide melts. Resolving the fundamental characteristics and genesis of mineralization at Eagle's Nest will provide critical information about the evolution of large chromium and Ni-Cu-PGE ore systems associated with Archean komatiitic magmatism within the Superior Province.
GEOSCAN ID306598