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TitleStructure, stratigraphy, U-Pb geochronology and alteration characteristics of gold mineralization at the Detour Lake Gold Deposit, Ontario, Canada
AuthorOliver, J; Ayer, J; Dubé, B; Aubertin, R; Burson, M; Panneton, G; Friedman, R; Hamilton, M
SourceExploration and Mining Geology vol. 20, 2012 p. 1-30
Alt SeriesEarth Sciences Sector, Contribution Series 20130054
AreaDetour Lake
Lat/Long WENS-80.0000 -79.5000 50.0000 49.7500
Subjectsstructural geology; geochronology; stratigraphy; mineral occurrences; mineral deposits; gold; mineralization; structural analyses; structural features; structural interpretations; structural controls; uranium lead dates; uranium lead dating; uranium lead ratios; alteration; Archean; Detour Lake Formation; Abitibi Greenstone Belt; Precambrian
Illustrationslocation maps; tables; Concordia diagrams; photomicrographs; stereonets; photographs; stratigraphic columns
ProgramTargeted Geoscience Initiative (TGI-4), Gold Ore Systems
AbstractThe Detour Lake gold deposit is located within the northwestern limit of the Archean Abitibi Subprovince of the Superior Province. Mineralized zones are hosted by a sequence of pillowed and massive flows, hyaloclastite units, and altered ultramafic rocks, and are commonly oriented parallel to a series of high-strain zones that are co-planar to the regional-scale Sunday Lake Deformation Zone. Early in its kinematic history, the Sunday Lake Deformation Zone placed older (2.72 Ga) volcanic rocks of the Detour Lake Formation over younger (2.70 Ga) sedimentary rocks of the Caopatina assemblage. Gold mineralization is also parallel to the position of a laterally persistent siliceous rock unit, the 2.725 Ga 'Chert Marker Horizon.' The Chert Marker Horizon coincides with the boundary between the mafic-dominated upper Detour Lake Formation and the ultramafic-dominated lower Detour Lake Formation. Stratigraphic and geochronological data suggest that the Chert Marker Horizon is a deformed felsic volcaniclastic unit.