| Title | Geological setting of Lake Banook - sedimentation and habitat in an urban lake |
| Download | Downloads |
| Author | Huppertz, T J; King, E L; Peters, N M; Cameron, G D M |
| Source | Geological Survey of Canada, Open File 5877, 2008, 1 sheet, https://doi.org/10.4095/226072 |
| Year | 2008 |
| Document | open file |
| Lang. | English |
| Media | paper; digital; on-line |
| File format | pdf; JPEG2000 |
| Province | Nova Scotia |
| NTS | 11D/12 |
| Area | Lake Banook; Penhorne Lake; Dartmouth |
| Lat/Long WENS | -64.0000 -63.5000 44.7500 44.5000 |
| Subjects | marine geology; hydrogeology; lake sediments; lake water; lakes; depositional environment; lacustrine environments; side-scan sonar; bathymetry; topography; seismic interpretations; seismic profiles;
slope failures; slope stability; stratigraphic correlations; biomes; biological communities |
| Illustrations | location maps; photographs; profiles; stratigraphic columns |
| Viewing | |
| Natural Resources Canada Library - Ottawa (Earth Sciences) |
| Natural Resources Canada library - Calgary (Earth Sciences) |
| Geological Survey of Canada (Atlantic) |
| Natural Resources Canada library - Vancouver (Earth Sciences) |
| Natural Resources Canada library - Québec (Earth Sciences) |
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| Program | Geohazards and Constraints to Offshore Development, Geoscience for Oceans Management |
| Program | NSERC Natural Sciences and Engineering Research Council of
Canada |
| Released | 2008 11 17 |
| Abstract | 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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