| Titre | Geological setting of Lake Banook - sedimentation and habitat in an urban lake |
| Télécharger | Téléchargements |
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| Licence | Veuillez noter que la Licence du gouvernement
ouvert - Canada remplace toutes les licences antérieures. |
| Auteur | Huppertz, T J; King, E L; Peters, N M; Cameron, G D M |
| Source | Commission géologique du Canada, Dossier public 5877, 2008, 1 feuille, https://doi.org/10.4095/226072  Accès ouvert |
| Image |  |
| Année | 2008 |
| Éditeur | Ressources naturelles Canada |
| Document | dossier public |
| Lang. | anglais |
| DOI | https://doi.org/10.4095/226072 |
| Media | papier; numérique; en ligne |
| Formats | pdf; JPEG2000 |
| Province | Nouvelle-Écosse |
| SNRC | 11D/12 |
| Région | Lake Banook; Penhorne Lake; Dartmouth |
| Lat/Long OENS | -64.0000 -63.5000 44.7500 44.5000 |
| Sujets | sediments lacustres; eaux lacustres; lacs; milieu sédimentaire; milieux lacustres; sonar latéral; bathymétrie; topographie; interpretations sismiques; profils sismiques; glissements de pentes; stabilité
des pentes; corrélations stratigraphiques; biomes; peuplements biologiques; géologie marine; hydrogéologie |
| Illustrations | cartes de localisation; photographies; profils; échelles stratigraphiques |
| Programme | Les géosciences à l'appui de la gestion des océans Aléas géologiques et contraintes à la mise en valeur des ressources extracôtières |
| Programme | CRSNG Conseil de recherches en sciences
naturelles et en génie du Canada |
| Diffusé | 2008 11 17 |
| Résumé | (disponible en anglais seulement)
Sequence B is the second of three unconformity-bounded, post-Hudsonian Proterozoic sequences in northern Canada. Its deposition postdated the Grenvillian
orogeny (ca. 1200-1000 Ma) and ended prior to the break-up of Rodinia (ca. 780-720 Ma). Sequence B crops out: in the Mackenzie Mountains, Wernecke Mountains, and Ogilvie Mountains of the northern Canadian Cordillera; south of Amundsen Gulf on the
northern mainland; and on Victoria Island and Banks Island. Exposures in the eastern Northwest Territories and western Nunavut are part of the Amundsen Basin. Sequence B is present also in the subsurface in all these regions, as well as beneath the
northern interior plains. Lithostratigraphic nomenclature of Sequence B is well developed in the Amundsen basin (Shaler Supergroup), partly formalized in the Mackenzie Mountains (Mackenzie Mountains supergroup), and largely informal elsewhere.
Formations encompass a wide variety of siliciclastic, carbonate, and evaporite lithofacies. Deposition of Sequence B is interpreted to have taken place in an epicratonic basin (epeiric sea) that was episodically restricted during its evolution. Net
depositional thickness of Sequence B was roughly twice as thick in the Mackenzie Mountains as in the Amundsen Basin, probably reflecting greater syndepositional crustal extension in the former area. Recognition of five, regional-scale subsequences
with Sequence B permits correlation between the northern Cordillera and the Amundsen Basin but the subsequences cannot be recognized at present beneath the interior plains. Correlation charts and isopach maps presented in this report aid in
reconstructing the tectonostratigraphic evolution of Sequence B. Sequence B has known potential for sediment-hosted base-metal deposits and red-bed-type stratiform Cu-Ag-Co deposits. In the Amundsen Basin, carving stone is obtained from Sequence B
and some gypsum deposits may be of industrial value. Hydrocarbon potential is low to absent. |
| GEOSCAN ID | 226072 |
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