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TitleGeology of the Markham Bay-Crooks Inlet area, southern Baffin Island, Northwest Territories
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorScott, D J; St-Onge, M R; Wodicka, NORCID logo; Hanmer, S
SourceCanadian Shield/Bouclier Canadien; by Geological Survey of Canada; Geological Survey of Canada, Current Research no. 1997-C, 1997 p. 157-166, Open Access logo Open Access
PublisherNatural Resources Canada
Mediapaper; on-line; digital
RelatedThis publication is contained in Canadian shield
File formatpdf
NTS25K/13; 25K/14; 25L/09; 25L/10; 25L/14; 25L/15; 25L/16; 25M; 25N
AreaCanadian Shield; Baffin Island; Kimmirut; Iqualuit; Frobisher Bay; Crooks Inlet; Markham Bay; Big Island
Lat/Long WENS-72.0000 -68.0000 64.0000 62.5000
Subjectsigneous and metamorphic petrology; stratigraphy; structural geology; gneisses; orthogneisses; metasedimentary rocks; metamorphic rocks; lithology; igneous rocks; marbles; quartzites; depositional environment; plutonic rocks; monzo-granites; tectonostratigraphic zones; ultramafic rocks; pelites; sedimentary rocks; deformation; metamorphism; stratigraphic analyses; stratigraphic correlations; field relations; faults; faults, thrust; folds; structural features; Lake Harbour Group; Blandford Bay assemblage; Cumberland batholith; Proterozoic
Illustrationssketch maps; photographs
Released1997 02 01
AbstractMetasedimentary rocks and orthogneisses of the Markham Bay-Crooks Inlet area comprise folded and imbricated panels of a broadly south-verging thrust þ fold belt subsequently affected by orogen-parallel folding and cross-folding. Two assemblages of supracrustal rocks have been identified: the more extensive shelf sequence comprises the marbles, psammites, and semipelites of the ca. 1.93-1.86 Ga Lake Harbour Group, the second is characterized by thick successions of feldspathic quartzite and pelite, interpreted as a foreland basin sequence and intruded by layered ultramafic-mafic sills. Several types of orthogneiss have been recognized: 1) layered hornblende tonalite and monzogranite gneiss imbricated with supracrustal units in the southern part of the area, and 2) orthopyroxene tonalite with diorite sheets in the central part of the area that is in part 1.84-1.82 Ga. The ca. 1.85 Ga Cumberland monzogranite batholith postdates earliest imbrication, but is itself carried by youngest thrusts.

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