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TitleAges of diabase dyke intrusions, Great Slave Lake shear zone, Northwest Territories
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorPehrsson, S J; van Breemen, O; Hanmer, S
SourceRadiogenic age and isotopic studies: report 7; by Geological Survey of Canada; Geological Survey of Canada, Paper no. 93-2, 1993 p. 23-28, Open Access logo Open Access
PublisherNatural Resources Canada
Mediapaper; on-line; digital
RelatedThis publication is contained in Radiogenic age and isotopic studies: report 7
File formatpdf
ProvinceNorthwest Territories
NTS75K/05; 75L/08
AreaMcKee Lake
Lat/Long WENS-110.5000 -109.5000 62.5000 62.2500
Subjectsgeochronology; volcanic rocks; dykes; diabases; igneous rocks; uranium lead dates; radiometric dates; Archean; Great Slave Lake Shear Zone; Great Slave Lake Supergroup; McDonald Fault; Mackenzie Dykes; Hearne Dykes; Proterozoic; Precambrian
Illustrationssketch maps; Concordia diagrams
Released1994 01 01
AbstractU-Pb isotopic analysis of baddeleyite from two diabase dykes within the Great Slave Lake shear zone, both trending 080°, yield disparate Proterozoic ages. A dyke which cuts Archean leucogranite is 2038 +/- 3 Ma old, suggesting that this intrusion is part of the Hearne dyke swarm of the southeastern Archean Slave Province. A slightly altered dyke emplaced into early Proterozoic biotite-hornblende granite has yielded an age of 1267 +/- 3 Ma. This age justifies correlation with the northwesterly-trending Mackenzie dyke swarm.

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