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TitleSedimentology of an early Cambrian tide-dominated embayment: Quyuk formation, Victoria Island, Arctic Canada
AuthorDurbano, A M; Pratt, B R; Hadlari, T; Dewing, K
SourceSedimentary Geology vol. 320, 2015 p. 1-18, https://doi.org/10.1016/j.sedgeo.2015.02.004
Year2015
Alt SeriesEarth Sciences Sector, Contribution Series 20140334
PublisherElsevier
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf
ProvinceNorthwest Territories
NTS87E/09; 87E/10; 87F/11; 87E/12; 87E/13; 87E/14; 87E/15; 87E/16; 87F/09; 87F/10; 87F/15; 87F/16; 87G/01; 87G/08; 87G/09; 87G/16; 87H; 88A/03; 88A/04; 88B/01
AreaMinto Inlet; Victoria Island
Lat/Long WENS-116.7500 -112.0000 72.2500 70.5000
Subjectsstratigraphy; sedimentology; sedimentary facies; sedimentary environment; sedimentary structures; systematic stratigraphy; bedding; stratigraphic analyses; stratification; mudstones; sandstones; bioturbation; marine deposits; marine sediments; marine environments; marine sands; fossils; oolites; oolitic iron ores; shorelines; transgressions; dunes; tide-dominated embayment; Quyuk formation; Shallow marine embayment; Cambrian; Paleozoic
Illustrationslocation maps; structural cross-sections; tables; stratigraphic cross-sections; photographs; sketch maps; photomicrographs; structural diagrams
ProgramWestern Arctic Sverdrup Basin, GEM2: Geo-mapping for Energy and Minerals
AbstractThe early Cambrian (series 2, stage 4) Quyuk formation is exposed in the Minto Inlier of western Victoria Island, Canadian Arctic Islands, and forms the base of the Phanerozoic succession. Coeval with other sandstones of this age in Laurentia, itwas deposited in a shallow-marine embayment on a passive margin during the initial phase of the early Paleozoic transgression. Four facies associations are recognized: (1) offshore muds consisting dominantly of dark gray laminated mudstone with discontinuous laminae of medium- to coarse sand; (2) offshore sand dune fields characterized by laterally continuous, planar cross-stratified beds up to 1.4 m thick of medium- to coarse-grained sandstone; (3) distal nearshore consisting dominantly of fine- to medium-grained bioturbated sandstone and fine- to medium-grained sandstone interbedded with laminated mudstone; and (4) proximal nearshore characterized by laterally continuous fine- to medium-grained bioturbated sandstone and medium-grained oolitic ironstone. Large scale dunes of facies association 2 record areas where tidal currents were amplified and had available sediment supply in contrast to facies association 1, which was sediment starved. Dunes are, for the most part, non-bioturbated or contain just a few individual burrows belonging to Skolithos. In nearshore settings, bioturbation in the form of a typical early Cambrian suite of shallow-subtidal ichnofossils predominated, representing a low-diversity Cruziana ichnofacies. Oolitic ironstone horizons in the proximal nearshore mark periods of low sedimentation rates when iron became concentrated and calcite was the primary cementing agent. The coastline is envisaged as a complex of bays and lagoons.
Summary(Plain Language Summary, not published)
This manuscript summarizes sedimentology research toward a Master's thesis under the GEM program. Cambrian strata on Victoria Island were deposited in a shallow marine setting with predominantly tidal influence. We infer the basin to have been an embayment on an otherwise broad shelf.
GEOSCAN ID295602