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TitleGeology of the McKellar Bay-Wight Inlet-Frobisher Bay area, southern Baffin Island, Northwest Territories
DownloadFree download (whole publication) (pdf 114493 KB)
AuthorSt-Onge, M R; Scott, D J; Wodicka, N; Lucas, S B
SourceCanadian Shield/Bouclier canadien; by Geological Survey of Canada; Geological Survey of Canada, Current Research no. 1998-C, 1998 p. 43-53,
PublisherNatural Resources Canada
RelatedThis publication is contained in Geological Survey of Canada; Geological Survey of Canada; (1998). Canadian shield, Geological Survey of Canada, Current Research no. 1998-C
NTS25K; 25L; 25M; 25N
AreaBaffin Island; Frobisher Bay; McKellar Bay; Wight Inlet
Lat/Long WENS-72.0000 -68.0000 64.0000 62.0000
Subjectsstructural geology; tectonics; bedrock geology; lithology; metasedimentary rocks; orthogneisses; metamorphic rocks; folds; structural interpretations; structural features; anorthosites; tonalites; monzo-granites; granodiorites; igneous rocks; tectonic elements; deformation; metamorphism; faults; structural trends; Lake Harbour Group; Narsajuaq arc; Blandford Bay assemblage; Ramsey River orthogneiss; Precambrian; Proterozoic
Illustrationssketch maps; photographs
Released1998 03 01
AbstractMetasedimentary rocks and orthogneiss of the McKellar Bay-Wight Inlet-Frobisher Bay area (southern Baffin Island) occur in recumbently folded and imbricated panels of a southwest-verging fold-thrust belt exposed along the hinge zone and southeastern limb of a regional crossfold antiform. Three principal tectonostratigraphic assemblages are recognized. At the lowest structural levels, in the hinge of the antiform, are layered monzogranite-granodiorite-tonalite orthogneiss with diorite and rare anorthosite (Narsajuaq arc) dated at 1.84-1.82 Ga. Marble, psammite, and semipelite of the 1.93-1.86 Ga Lake Harbour Group tectonically overlie this orthogneiss. A ca. 1.95 Ga dominantly monzogranite-tonalite orthogneiss (Ramsay River orthogneiss) occurs at the highest structural levels preserved on the limbs of the regional antiform, where it is imbricated with the structurally underlying Lake Harbour Group. Both the Lake Harbour Group and Ramsay River orthogneiss are intruded by the ca. 1.86-1.85 Ga Cumberland batholith.