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TitleGeology of the Uvauk complex, Northwest Territories (Kivalliq region, Nunavut)
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorMills, A; Berman, RORCID logo; Hanmer, S
SourceCanadian Shield/Bouclier canadien; by Geological Survey of Canada; Geological Survey of Canada, Current Research no. 1999-C, 1999 p. 97-106, Open Access logo Open Access
PublisherNatural Resources Canada
Mediapaper; on-line; digital
RelatedThis publication is contained in Canadian Shield
File formatpdf
NTS55N/15NE; 55N/15SE
AreaUvauk Inlet; Chesterfield Inlet
Lat/Long WENS-92.7500 -92.5833 64.0000 63.7500
Subjectsstructural geology; igneous and metamorphic petrology; lithology; plutonic rocks; anorthosites; tonalites; volcanic rocks; plutonic rocks; diorites; igneous rocks; gneisses; metamorphic rocks; dykes; mafic volcanic rocks; orthogneisses; field relations; textural analyses; metamorphic facies; amphibolite facies; granulite facies; metamorphism; lineations; structural interpretations; structural features; Churchill Province; Uvauk complex; Precambrian
Illustrationssketch maps; photographs
ProgramWestern Churchill NATMAP Project
Released1999 02 01
AbstractThe Uvauk complex comprises anorthosite, gabbroic anorthosite, diorite, gabbro, and quartzofeldspathic gneiss that have been strongly deformed and metamorphosed at granulite grade, with a subsequent, pervasive, amphibolite-grade overprint. Detailed mapping of the western portion of the complex suggests that the anorthosite represents a synkinematic intrusion into diorite and quartzofeldspathic gneiss wall rocks. Field relations do not unequivocally indicate whether wall rocks had undergone an earlier, Archean, granulite- facies, mylonitization event, or whether all deformation and metamorphism is related to one progressive event.
Sinistral shear-sense indicators to the north and dextral shear-sense indicators to the south of the anorthosite indicate eastward transport of the anorthosite body with respect to its wall rocks. The shallow, east-plunging lineation and limited metamorphic contrast across the wall rocks suggest minimal vertical displacement.

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