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TitleCretaceous dinoflagellate cysts from the Smoking Hills area, Northwest Territories, Canadian Arctic
AuthorBringué, MORCID logo; Fensome, R A; Galloway, JORCID logo
SourceGeological Society of America, Abstracts With Programs vol. 51, no. 5, 340262, 2019 p. 1,
LinksOnline - En ligne
Alt SeriesNatural Resources Canada, Contribution Series 20190121
PublisherGeological Society of America
MeetingGeological Society of America Annual Meeting 2019; Phoenix, AZ; US; September 22-25, 2019
Mediaon-line; digital
File formathtml; pdf
ProvinceNorthwest Territories
NTS97C/03; 97C/04; 97C/05; 97C/06; 97C/11; 97C/12; 97C/13; 97C/14; 107D/01; 107D/08; 107D/09; 107D/16
AreaSmoking Hills; Cape Bathurst; Franklin Bay; Horton River; Canadian Arctic
Lat/Long WENS-128.3333 -126.0000 70.0000 69.0000
Subjectspaleontology; stratigraphy; tectonics; Nature and Environment; Science and Technology; micropaleontology; microfossils; palynology; palynomorphs; systematic paleontology; taxonomy; stratigraphic correlations; bedrock geology; lithology; sedimentary rocks; field work; paleoenvironment; tectonostratigraphic zones; tectonic evolution; thermal maturation; Dinoflagellates; Anderson Plains; Langton Bay Formation; Horton River Formation; Smoking Hills Formation; Mason River Formation; Sverdrup Basin; Isachsen Formation; Christopher Formation; Kanguk Formation; Western Interior Seaway; Phanerozoic; Mesozoic; Cretaceous
ProgramGEM2: Geo-mapping for Energy and Minerals Western Arctic, Tertiary Onshore, Smoking Hills
Released2019 09 01
AbstractThe Smoking Hills area, located on the east side of Cape Bathurst and adjacent to Franklin Bay, hosts Cretaceous sedimentary strata largely exposed on the banks of the Horton River that cuts through the Anderson plains. In the summer of 2018, the Geological Survey of Canada (GSC) lead its first fieldwork in the area since the initial GSC surveys were conducted in the late 1960s, collecting high stratigraphic resolution samples for multi-disciplinary stratigraphic investigations, paleoenvironmental reconstructions and insights on the tectonostratigraphic evolution of the Arctic. This study focusses on the highly diverse and abundant dinoflagellate cysts from the Lower Cretaceous Langton Bay (Berriasian-Valanginian(?) to early Middle Albian) and Horton River formations (Middle Albian), and the Upper Cretaceous Smoking Hills (Santonian to Campanian) and Mason River formations (Campanian to Maastrichtian).
Specific objectives are (1) to update the taxonomy of Cretaceous dinoflagellate cyst species reported in the western Canadian Arctic to allow for regional correlations across similarly aged strata, (2) to establish age equivalence of Cretaceous strata from the Smoking Hills area and the Sverdrup Basin (Isachsen, Christopher and Kanguk formations), which currently constitutes the reference framework for Canadian Arctic stratigraphy, and (3) to attempt paleoenvironmental reconstructions to resolve oceanographic changes associated with the influence of Western Interior Seaway (Smoking Hills area) compared to the late post-rift stage of the Sverdrup Basin. Preliminary results indicate excellent palynomorph preservation, low thermal maturity of samples and high species diversity.
Summary(Plain Language Summary, not published)
Dinoflagellate cysts from the Smoking Hills area (Northwest Territories) are studied for the fist time since the early GSC surveys of the late 1960s. This group of microfossils is useful for biostratigraphic correlations and reconstructing past environments. This study aims at clarifying the taxonomy of species encountered in the region, and at establishing links between Cretaceous strata exposed on the Arctic mainland (at the time under the influence of the Western Interior Seaway) and those from the better known Sverdrup Basin, in terms of timing of deposition and environments. Preliminary results will be presented on these samples that yield abundant and well preserved dinoflagellate cysts.

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