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TitleGeology of Paul Lake area, Lac de Gras-Lac du Sauvage region of the central Slave Province, District of Mackenzie, Northwest Territories
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorKjarsgaard, B AORCID logo; Wyllie, R J S
SourceCanadian Shield/Bouclier canadien; by Geological Survey of Canada; Geological Survey of Canada, Current Research no. 1994-C, 1994 p. 23-32, Open Access logo Open Access
PublisherNatural Resources Canada
Mediapaper; on-line; digital
RelatedThis publication is contained in Canadian Shield
File formatpdf
ProvinceNorthwest Territories
NTS76D/09; 76D/08; 76D/10; 76D/07
AreaLac de Gras; Lac du Sauvage; Paul Lake
Lat/Long WENS-111.0000 -110.0000 64.7500 64.2500
Subjectsigneous and metamorphic petrology; structural geology; economic geology; lithology; metasedimentary rocks; metamorphic rocks; plutonic rocks; tonalites; quartz diorites; greywackes; kimberlites; granitic rocks; igneous rocks; deformation; metamorphism; faults; folds; structural features; dykes; Archean; field relations; structural trends; rubidium strontium dates; radiometric dates; Eocene; strain analysis; diamond; Slave Province; Precambrian; Tertiary
Illustrationssketch maps; photographs
ProgramCanada-Northwest Territories Mineral Initiatives, 1991-1996
Released1994 02 01
AbstractThe Lac de Gras area of the Northwest Territories is currently the focus of intense exploration activity for diamondiferous kimberlite intrusions. The geology is dominated by Archean metagreywacke and granitoids. Ductile deformation has produced at least two sets of folds and related fabrics. Granitoid emplacement occurs syn- and post-tectonically. Faulting occurred during the Late Archean/Early Proterozoic. Four Proterozoic dyke swarms cut the Archean rocks in the map area. Detailed structural data were obtained for the area, along with subdivisions of the granitoid suites represented and new information on contact relationships. Possible controls on the spatial emplacement of kimberlites are considered in relation to regional structures and Proterozoic dyke swarms.

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