GEOSCAN Search Results: Fastlink


TitleHigh-resolution correlation between contrasting early Tonian carbonate successions in NW Canada highlights pronounced global carbon isotope variations
AuthorGreenman, J W; Rainbird, R HORCID logo; Turner, E C
SourcePrecambrian Research vol. 346, 105816, 2020 p. 1-17,
Alt SeriesNatural Resources Canada, Contribution Series 20200113
Mediapaper; on-line; digital
File formatpdf
ProvinceNorthwest Territories; Yukon
NTS95; 97A/02; 97A/03; 97A/06; 97A/07; 97A/10; 97A/11; 97A/14; 97A/15; 97D/02; 97D/03; 105; 106; 116
AreaUyarsivik Lake; Hornaday river; Mackenzie Mountains
Lat/Long WENS-123.0000 -121.0000 69.2500 68.0000
Lat/Long WENS-140.0000 -122.0000 67.0000 60.0000
Subjectsgeochemistry; stratigraphy; sedimentology; Nature and Environment; Science and Technology; bedrock geology; lithology; sedimentary rocks; carbonates; depositional environment; depositional history; correlations; basin analyses; isotopic studies; carbon isotopes; oxygen isotopes; Neoproterozoic; Shaler Supergroup; Mackenzie Mountains Supergroup; Rodinia; Brock Inlier; Aok Formation; Boot Inlet Formation; McClure Formation; Stone Knife Formation; Precambrian; Proterozoic
Illustrationslocation maps; tables; photographs; stratigraphic sections
ProgramGEM2: Geo-mapping for Energy and Minerals
Released2020 06 06
AbstractCarbonate successions older than the 800 Ma Bitter Springs isotope anomaly are sparse and this time is consequently poorly understood. The Shaler and Mackenzie Mountains supergroups of northwestern Canada, however, contain thick ca. 1050-750 Ma carbonate successions recording both deep- and shallow-water depositional environments that are interpreted to have been deposited in two separate, extensive epicratonic basins on the Rodinia supercontinent. When the contrasting sedimentology (benthic- versus pelagic-dominated carbonate production) and basin dynamics of two correlative carbonate successions from these basins are accounted for, a precise regional correlation can be made using sequence stratigraphic and carbon isotope data. This paper presents a regionally correlatable carbon isotope profile, containing substantial excursions between -2 and 7 per mille vpdb, that can be used to extend the global curve into early Neoproterozoic time prior to the Bitter Springs anomaly.

Date modified: