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TitleAn unnamed Proterozoic map unit, Pool Creek map area (NTS 95-C/5), southeasternmost Yukon
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LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorMacNaughton, R BORCID logo
SourceCentral Foreland NATMAP Project: Proterozoic to Devonian stratigraphic sections in British Columbia and Yukon; by Lane, L SORCID
logo (ed.); MacNaughton, R BORCID logo (ed.); Geological Survey of Canada, Bulletin 603, 2017 p. 205-222, https://doi.org/10.4095/299867 Open Access logo Open Access
Image
Year2017
PublisherNatural Resources Canada
Documentserial
Lang.English
Mediaon-line; digital
RelatedThis publication is contained in Central Foreland NATMAP Project: Proterozoic to Devonian stratigraphic sections in British Columbia and Yukon
File formatreadme
File formatpdf; csv; xlsx
ProvinceYukon
NTS95C/05
AreaPool Creek
Lat/Long WENS-126.0000 -125.5000 60.5000 60.2500
Subjectsregional geology; stratigraphy; paleontology; geochronology; tectonics; systematic stratigraphy; lithostratigraphy; biostratigraphy; bedrock geology; lithology; sedimentary rocks; argillites; sandstones; siltstones; shales; mudstones; conglomerates; igneous rocks; volcanic rocks; breccias; basalts; clasts; intrusive rocks; syenites; hornfels; depositional environment; geological history; tectonic evolution; intrusions; emplacement; depositional history; debris flow deposits; deformation; slumps; folding; biostratigraphy; microfossils; conodonts; correlations; radiometric dating; uranium lead dating; zircon dates; Eocene; continental margins; continental slope; sedimentary structures; Canadian Cordillera; Cordilleran Foreland; Foreland Belt; Pool Creek Syenite; Crow Formation; Appekunni Formation; Windermere Supergroup; Hay Creek Group; Phanerozoic; Cenozoic; Tertiary; Precambrian; Proterozoic
Illustrationsgeoscientific sketch maps; photographs; lithologic sections; sketches
ProgramCentral Foreland NATMAP Project
Released2017 12 29
AbstractAn unnamed map unit in central Pool Creek map area (NTS 95-C/5) is dominated by green-weathering argillite with lesser sandstone and breccia. The map unit rocks were hornfelsed during emplacement of the Pool Creek syenite at ca. 640 to 650 Ma and thus it is Neoproterozoic or older. A detailed measured section through part of the unit documented three facies associations (FAs). The 'argillite FA' is dominated by hornfelsed siltstone and shale, with minor sandstone. Volumetrically, it is the most significant of the three facies associations. The 'argillite and sandstone FA' contains the same rock types but a greater proportion of sandstone. Both facies associations were probably deposited mainly from turbidity currents, with lesser input from hemipelagic processes and sandy debris flows. In contrast, the 'breccia FA' consists of intraformational to basalt-clast breccia. It records deposition from debris flows. Soft-sediment deformation, including large-scale slump folding, is prevalent throughout the measured interval. The map unit was deposited on a deep-marine slope.
Summary(Plain Language Summary, not published)
This bulletin presents detailed descriptions and measured thicknesses for a suite of 79 stratigraphic sections ranging in age from the Late Precambrian to the Devonian, distributed across northern British Columbia and adjacent Yukon. These descriptions permit interpretations of regional trends in the distribution of shallow water vs deeper water successions through early Paleozoic time. This extensive data compilation underpins syntheses, presented here and in external publications, of the changes to the form and depth of western Canada's Paleozoic marginal seas and their implications for regional hydrocarbon potential.
GEOSCAN ID299867

 
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