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TitleProterozoic reworking in western Churchill Province, Gibson Lake-Cross Bay area, Northwest Territories (Kivalliq region, Nunavut). Part 2: regional structural geology
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorHanmer, S; Tella, S; Sandeman, H A; Ryan, J J; Hadlari, TORCID logo; Mills, A
SourceCanadian Shield/Bouclier canadien; by Geological Survey of Canada; Geological Survey of Canada, Current Research no. 1999-C, 1999 p. 65-75, Open Access logo Open Access
PublisherNatural Resources Canada
Mediapaper; on-line; digital
RelatedThis publication is contained in Canadian Shield
File formatpdf
NTS55M/09; 55M/16; 55N/05NW; 55N/05NE; 55N/06NW; 55N/06NE; 55N/11; 55N/12; 55N/13; 55N/14
AreaGibson Lake; Cross Bay; Chesterfield Inlet; Broken Drum Lake
Lat/Long WENS-94.5000 -93.0000 64.0000 63.4167
Subjectsstructural geology; folds; foliation; shear zones; structural trends; structural interpretations; field relations; structural features; metamorphic rocks; metamorphism; lithology; Churchill Province; Gibson-MacQuoid Homocline; Cross Bay Plutonic Complex; Big Lake shear zone; Cross Bay fault; Precambrian
Illustrationssketch maps; photographs
ProgramWestern Churchill NATMAP Project
Released1999 02 01
AbstractThe principal structural elements in the Gibson Lake- Cross Bay map area are, the Gibson- MacQuoid D2 homocline, overlain with possible structural discordance by a volcanic belt, intruded by Neoarchean, syn-D2 plutons; and the Cross Bay plutonic complex, wherein S2 is deformed about south-plunging, F3 folds, associated with a coaxial L3 extension lineation, and east- northeast-trending, F4 folds. The plutonic complex is bounded to the south by the pre-, syn-, and post-D4, dextral, strike-slip Big lake shear zone. Metamorphosed, ca. 2.19 Ga, MacQuoid dykes everywhere postdate S2, but within the Cross Bay complex and the Big lake shear zone they were deformed during D3-D4. Therefore, D3 and D4 are regional Paleoproterozoic events. Granitic plutons within the plutonic complex were intruded after D2 and before D4 fabrics, respectively, and represent Paleoproterozoic magmatic events.

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