| Title | Ages of diabase dyke intrusions, Great Slave Lake shear zone, Northwest Territories |
| Download | Download (whole publication) |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Pehrsson, S J; van Breemen, O; Hanmer, S |
| Source | Radiogenic age and isotopic studies: report 7; by Geological Survey of Canada; Geological Survey of Canada, Paper no. 93-2, 1993 p. 23-28, https://doi.org/10.4095/193330  Open Access |
| Year | 1993 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| Related | This publication is contained in Radiogenic age and isotopic
studies: report 7 |
| File format | pdf |
| Province | Northwest Territories |
| NTS | 75K/05; 75L/08 |
| Area | McKee Lake |
| Lat/Long WENS | -110.5000 -109.5000 62.5000 62.2500 |
| Subjects | geochronology; 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 |
| Illustrations | sketch maps; Concordia diagrams |
| Released | 1994 01 01 |
| Abstract | U-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. |
| GEOSCAN ID | 193330 |
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