Wave-influenced deltaic sandstone bodies and offshore deposits in the Viking Formation, Hamilton Lake area, south-central Alberta, Canada
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Résumé
Research Article| June 01, 2010 Wave-influenced deltaic sandstone bodies and offshore deposits in the Viking Formation, Hamilton Lake area, south-central Alberta, Canada Lynn T. Dafoe; Lynn T. Dafoe Department of Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Science Building, Edmonton, AB T6G 2E3, lynn.dafoe@ualberta.ca Search for other works by this author on: GSW Google Scholar Murray K. Gingras; Murray K. Gingras Department of Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Science Building, Edmonton, AB T6G 2E3, mgingras@ualberta.ca Search for other works by this author on: GSW Google Scholar S. George Pemberton S. George Pemberton Department of Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Science Building, Edmonton, AB T6G 2E3, George.Pemberton@ualberta.ca Search for other works by this author on: GSW Google Scholar Author and Article Information Lynn T. Dafoe Department of Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Science Building, Edmonton, AB T6G 2E3, lynn.dafoe@ualberta.ca Murray K. Gingras Department of Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Science Building, Edmonton, AB T6G 2E3, mgingras@ualberta.ca S. George Pemberton Department of Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Science Building, Edmonton, AB T6G 2E3, George.Pemberton@ualberta.ca Publisher: Canadian Energy Geoscience Association Accepted: 21 Jan 2010 First Online: 02 Mar 2017 Online ISSN: 2368-0261 Print ISSN: 0007-4802 © The Society of Canadian Petroleum Geologists Bulletin of Canadian Petroleum Geology (2010) 58 (2): 173–201. https://doi.org/10.2113/gscpgbull.58.2.173 Article history Accepted: 21 Jan 2010 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Lynn T. Dafoe, Murray K. Gingras, S. George Pemberton; Wave-influenced deltaic sandstone bodies and offshore deposits in the Viking Formation, Hamilton Lake area, south-central Alberta, Canada. Bulletin of Canadian Petroleum Geology 2010;; 58 (2): 173–201. doi: https://doi.org/10.2113/gscpgbull.58.2.173 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of Canadian Petroleum Geology Search Advanced Search Abstract Subtle indications of deltaic influence can be overlooked in coarsening-upward units that resemble shoreface successions such as those found in the Cretaceous Viking Formation at Hamilton Lake (HL). Particular facies within HL strata contain physical and biogenic indicators of riverine discharge, and are interpreted as deltaic in origin. This study focuses on distinguishing between these deltaic deposits and strata reflecting normal-marine depositional conditions and relating facies within the stratigraphic framework. Based on detailed facies analysis, Viking deposits include: delta front, prodelta, upper offshore, lower offshore, shelf, slump and transgressive lag deposits.The principal group of facies, Facies Association 1 (FA1), is interpreted as deltaic in nature, which is indicated by evidence of: high sedimentation rates, salinity fluctuations, riverine discharge, hypopycnal and hyperpycnal flows, and moderately to subtly stressed ichnological suites. Trace fossil suites indicate suppression of suspension-feeding activities despite the presence of hummocky cross-stratified units that resemble shoreface deposition. Filter-feeding organisms are typically abundant in shoreface and wave-dominated deltaic successions. In the case of HL strata, hindrance of dwellings of inferred suspension-feeding animals in FA1 is attributed to increased water turbidity and suspended sediment associated with deltaic outflow. The presence of a restricted suite of structures of inferred suspension-feeders is uncharacteristic of river-dominated deltaic units, which are primarily reworked by deposit feeders. Accordingly, sedimentological evidence in combination with the proportion of dwellings of inferred suspension-feeders signifies moderate wave mitigation of environmental stresses induced by riverine discharge indicative of a wave-influenced deltaic system.In contrast to FA1, muddy sandstones to sandy mudstones of Facies Association 2 contain abundant and diverse suites of trace fossils interpreted to reflect deposition in the distal lower shoreface to upper offshore. Facies Association 3 is predominantly comprised of sandy mudstones with varying degrees of bioturbation indicative of lower offshore, shelfal, slump and transgressive lag deposits. The depositional history at HL includes periods of progradation alternating with transgressive flooding, subaerial exposure, stillstand progradation and wave ravinement. Four major bounding discontinuities and two major transgressive flooding surfaces separate units reflecting predominantly deltaic deposition, strictly offshore deposition, and mixed offshore and deltaic deposition. Variation in the deltaic and normal-marine signature of the deposits suggests changes in source area(s) over time, shifting shore-parallel deltaic influence, or fluctuations in riverine influx. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,004 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».