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Title3D geological modelling of the Double Eagle-Black Thor intrusive complexes, McFaulds Lake Greenstone Belt, Ontario
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AuthorLaudadio, A B; Schetselaar, E; Houlé, M G; Samson, C
SourceTargeted Geoscience Initiative: 2017 report of activities, volume 2; by Rogers, N (ed.); Geological Survey of Canada, Open File 8373, 2018 p. 35-41, https://doi.org/10.4095/306599 (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
RelatedThis publication is related to Laudadio, A B; Schetselaar, E; Houlé, M G; (2018). 3D geological modelling of the Double Eagle-Black Thor intrusive complexes, McFaulds Lake Greenstone Belt, Ontario, Canada, Geological Survey of Canada, Scientific Presentation no. 82
File formatpdf
ProvinceOntario
NTS43D/09; 43D/16
AreaRing of Fire
Lat/Long WENS -86.4067 -86.1119 52.8208 52.7064
Subjectseconomic geology; structural geology; mineral deposits; nickel; copper; chromium; volcanogenic deposits; sulphide deposits; ore mineral genesis; mineralization; modelling; structural analyses; fabric analyses; drill core analyses; geophysical interpretations; magnetic interpretations; total field magnetics; anastomosis; greenstone belts; magmatism; intrusions; bedrock geology; lithology; igneous rocks; intrusive rocks; ultramafic rocks; mafic intrusive rocks; gabbros; felsic intrusive rocks; tonalites; granodiorites; diorites; granites; volcanic rocks; felsic volcanic rocks; metamorphic rocks; metavolcanic rocks; metasedimentary rocks; chromite; structural features; shear zones; splays; faults; host rocks; Archean; Eagle's Nest Deposit; Double Eagle Intrusive Complex; Black Thor Intrusive Complex; McFaulds Lake Greenstone Belt; Superior Province; Frank Shear Zone; McFaulds Shear Zone; ore systems approach; platinum group elements (PGE); volcanogenic massive sulphide deposits (VMS); 3D modelling; geological mapping; Precambrian
Illustrationslocation maps; geoscientific sketch maps; 3-D images; 3-D models; photographs
ProgramKnowledge Management Coordination, Targeted Geoscience Initiative (TGI-5)
ProgramNickel-copper-PGE-chromium systems, Targeted Geoscience Initiative (TGI-5)
Released2018 03 01
AbstractA 3D geological model is in development of the subsurface architecture and structural disposition of the Double Eagle (DEIC) - Black Thor (BTIC) intrusive complexes of the 'Ring of Fire' intrusive suite in northwestern Ontario. The 3D geological model is constrained by drillhole data from exploration claims, geological maps and a revised structural interpretation based on high resolution magnetic data. Gridded total magnetic field intensity grid was used to outline linear to curvilinear magnetic lows, defining a system of anastomosing shear zones that had previously been outlined on medium resolution magnetic data. Structural fabrics in drill core confirm that these shear zones define the contacts between ultramafic and gabbroic units within the intrusions, as well as the contacts with their felsic intrusive and volcanic host rocks. The Frank shear zone, which follows the northern margin of the ultramafic rock units in both intrusive complexes, displaces the chromite- and Ni-Cu-(PGE)-bearing ore zones within the DEIC for 1 to 1.5 km in a dextral apparent sense. To the south, the McFaulds shear zone overprinted the intrusive contact between the ultramafic rocks of the DEIC and its mafic-dominated volcanic host rocks. The 3D geological model will be used in an attempt to restore the displacement of the DEIC and BTIC with respect to their magmatic conduits in 3D space. This will ultimately provide new insights into the plumbing system associated with the Ni-Cu-(PGE) and chromite mineralization.
GEOSCAN ID306599