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TitreSedimentology of an early Cambrian tide-dominated embayment: Quyuk formation, Victoria Island, Arctic Canada
AuteurDurbano, 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
Année2015
Séries alt.Secteur des sciences de la Terre, Contribution externe 20140334
ÉditeurElsevier
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1016/j.sedgeo.2015.02.004
Mediapapier; en ligne; numérique
Formatspdf
ProvinceTerritoires du Nord-Ouest
SNRC87E/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
Lat/Long OENS-116.7500 -112.0000 72.2500 70.5000
Sujetsfaciès sédimentaires; milieu sédimentaire; structures sédimentaires; stratigraphie systématique; litage; analyses stratigraphiques; stratification; mudstones; grès; bioturbation; sédiments marins; sédiments marins; milieux marins; sables marins; fossiles; calcaires oolithiques; fer oolithique; littoraux; trangressions; dunes; stratigraphie; sédimentologie; Cambrien; Paléozoïque
Illustrationslocation maps; structural cross-sections; tables; stratigraphic cross-sections; photographs; sketch maps; photomicrographs; structural diagrams
ProgrammeBassin de Sverdrup de l'ouest de l'Arctique, GEM2 : La géocartographie de l'énergie et des minéraux
Résumé(disponible en anglais seulement)
The 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.
Résumé(Résumé en langage clair et simple, non publié)
Manuscrit résumant la recherche en sédimentologie en vue d¿une thèse de maîtrise dans le cadre du programme GEM. Les strates du Cambrien sur l¿Île Victoria ont été déposées dans un environnement marin peu profond où l¿effet des marées est prédominant. Nous déduisons que le bassin a été une baie sur un plateau généralement large.
GEOSCAN ID295602