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TitleStructural investigation and mineral potential of the Kidd-Munro assemblage in Clergue and Walker townships
AuthorDinel, E; Bleeker, W; Ayer, J; Dubé, B
SourceGeological Survey of Canada, Current Research (Online) no. 2008-23, 2008, 13 pages, (Open Access)
PublisherNatural Resources Canada
Mediaon-line; digital
File formatpdf (Adobe Acrobat Reader)
AreaWalker township; Clergue township; Cochrane
Lat/Long WENS-81.0000 -80.5000 48.7500 48.5000
Subjectsstratigraphy; structural geology; economic geology; Archean; bedrock geology; igneous rocks; volcanic rocks; mafic volcanic rocks; felsic volcanic rocks; greenstone belts; greenstones; structural features; folds; faults; faults, thrust; synclinoria; deformation; mineral occurrences; mineralization; gold; Kidd-Munro Assemblage; Porcupine Assemblage; Precambrian
Illustrationslocation maps; stereonets; block diagrams; photomicrographs; cross-sections
ProgramTargeted Geoscience Initiative (TGI-3), 2005-2010
Released2008 12 30
AbstractThe geology of Clergue and Walker townships consists of folded mafic to felsic volcanic rocks of the 2718 to 2710 Ma Kidd-Munro assemblage-. A newly recognized marker horizon helps to outline the stratigraphy and internal folding in the Kidd-Munro synclinorium.
Volcanic stratigraphy is generally steeply dipping, east-west trending, and (sub)parallel to a regional S2 cleavage that is axial planar to interpreted upright, isoclinal, doubly plunging F2 folds that expose the Kidd-Munro assemblage in a regional synclinorium. Along the southern and northern flanks of this synclinorium, the Porcupine assemblage siltstone units young toward the Kidd-Munro volcanic rocks suggesting thrust contacts. The simplest interpretation of the structure, satisfying all observed younging directions, is that the southern and northern bounding faults of the Kidd-Munro assemblage are the same thrust surface that, together with the assemblage, was folded into a regional synclinorium. The identification of this folded thrust suggests that gold mineralization along the southern thrust may resurface along the northern exposure.