Preliminary assessment of ichnofacies in the Gething Formation of NE British Columbia
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Résumé
Research Article| June 01, 2010 Preliminary assessment of ichnofacies in the Gething Formation of NE British Columbia Murray K. Gingras; Murray K. Gingras Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G 2E3 Search for other works by this author on: GSW Google Scholar John-Paul Zonneveld; John-Paul Zonneveld Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G 2E3 Search for other works by this author on: GSW Google Scholar Barton J. Blakney Barton J. Blakney Canadian Natural Resources Limited, 205 – 9 Avenue SE, Calgary, AB T2G 0R3 Search for other works by this author on: GSW Google Scholar Bulletin of Canadian Petroleum Geology (2010) 58 (2): 159–172. https://doi.org/10.2113/gscpgbull.58.2.159 Article history accepted: 18 May 2010 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Murray K. Gingras, John-Paul Zonneveld, Barton J. Blakney; Preliminary assessment of ichnofacies in the Gething Formation of NE British Columbia. Bulletin of Canadian Petroleum Geology 2010;; 58 (2): 159–172. doi: https://doi.org/10.2113/gscpgbull.58.2.159 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 The Gething Formation in the Kahntah River–Ring/Border region of northeastern British Columbia is a variably thick, heterolithic succession of facies deposited in continental and marginal-marine depositional settings. This unit was deposited on the southwestern flank of the Keg River Highlands in the northern Western Canada Foreland Basin (approximately 58°N, 120°W). Although Gething Formation sandstone bodies are exploration targets further south, it is not considered to be a primary exploration target in the study area due largely to its complex and laterally discontinuous nature. However, in the study interval several of the lithofacies possess good reservoir properties, and the overlaying Wilrich Shale provides a potential stratigraphic seal. Hydrocarbon sources are available in both the Wilrich Shale and the Triassic Montney Formation into which the Gething Formation incises. An understanding of the overall palaeogeography and lithofacies distribution of the Gething Formation in the study area is necessary for efficiently exploiting these hydrocarbon resources and will facilitate characterization of other Gething Formation reservoirs that may flank the Keg River Highland to the east and west.Subsurface mapping in the area of Ring and Kahntah River gas fields shows that the Gething Formation in the study area occurs within three sinuous incised valleys that debouch southward into a large structural basin. In their northernmost (upstream) reaches, Gething Formation strata are dominated by unbioturbated, high-angle cross-bedded and current-ripple laminated upper-fine-grained sandstones, rich in organic detritus (primarily coal flakes). These are interpreted as fluvial channel and bayhead delta deposits.Lithofacies deposited in continental settings grade southwards into bioturbated, low- and high-angle cross-bedded, lower to upper-fine-grained sandstones with thin, bioturbated siltstone and mudstone intervals. Rhythmic bedding, mud flasers and mud/sand couplets characterize these lithofacies. The trace fossils Planolites, Skolithos, Cylindrichnus, Arenicolites, Teichichnus, and fugichnia are common. These strata are interpreted to represent brackish-water bay deposits. South of this, the Gething Formation is dominated by interstratified, sporadically bioturbated sand, silt and mud, sedimentologically similar to the aforementioned brackish channel deposits, but with more diverse and robust ichnofauna (the previous assemblage as well as large Thalassinoides, rare Helminthopsis and Phycosiphon). These deposits are ascribed to tidal channels in a larger, more marine bay. 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 machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,004 | 0,004 |
| Études des sciences et des technologies | 0,003 | 0,001 |
| Communication savante | 0,002 | 0,000 |
| Science ouverte | 0,001 | 0,002 |
| Intégrité de la recherche | 0,000 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,004 | 0,001 |
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 source (Gemma direct ou Codex distillé), 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 ».