Maximum age of the basal Cretaceous Chinkeh Formation sandstones, Maxhamish Lake area, Liard Basin, British Columbia
Notice bibliographique
Résumé
Research Article| September 01, 2016 Maximum age of the basal Cretaceous Chinkeh Formation sandstones, Maxhamish Lake area, Liard Basin, British Columbia M. McMechan; M. McMechan Geological Survey of Canada, 3303 33rd St. NW, Calgary AB T2L 2A7 Search for other works by this author on: GSW Google Scholar W. Matthews; W. Matthews Centre for Pure and Applied Tectonics and Thermochronology, Department of Geosciences, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4 Search for other works by this author on: GSW Google Scholar F. Ferri; F. Ferri Petroleum Geoscience Section, Tenure and Geoscience Branch, Ministry of Natural Gas Development Victoria, BC V9A 5N7 Search for other works by this author on: GSW Google Scholar B. Guest B. Guest Centre for Pure and Applied Tectonics and Thermochronology, Department of Geosciences, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4 Search for other works by this author on: GSW Google Scholar Author and Article Information M. McMechan Geological Survey of Canada, 3303 33rd St. NW, Calgary AB T2L 2A7 W. Matthews Centre for Pure and Applied Tectonics and Thermochronology, Department of Geosciences, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4 F. Ferri Petroleum Geoscience Section, Tenure and Geoscience Branch, Ministry of Natural Gas Development Victoria, BC V9A 5N7 B. Guest Centre for Pure and Applied Tectonics and Thermochronology, Department of Geosciences, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4 Publisher: Canadian Society of Petroleum Geologists Received: 11 Jan 2016 Accepted: 06 Apr 2016 First Online: 13 Jul 2017 Online Issn: 2368-0261 Print Issn: 0007-4802 © the Society of Canadian Petroleum Geologists Bulletin of Canadian Petroleum Geology (2016) 64 (3): 467–476. https://doi.org/10.2113/gscpgbull.64.3.467 Article history Received: 11 Jan 2016 Accepted: 06 Apr 2016 First Online: 13 Jul 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation M. McMechan, W. Matthews, F. Ferri, B. Guest; Maximum age of the basal Cretaceous Chinkeh Formation sandstones, Maxhamish Lake area, Liard Basin, British Columbia. Bulletin of Canadian Petroleum Geology 2016;; 64 (3): 467–476. doi: https://doi.org/10.2113/gscpgbull.64.3.467 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 Sandstone, shale and conglomerate of the Chinkeh Formation represent shoreface and channelized environments forming the base of the Cretaceous section in Liard Basin of northeast British Columbia, southeast Yukon and southwest Northwest Territories. Biostratigraphic constraints on the formation indicated a Hauterivian to Early Albian age. New U-Pb detrital zircon ages obtained from a subsurface core in the Maxhamish Lake area indicate a maximum depositional age of 112.6 ± 2.0 Ma and an Early Albian to latest Aptian age. Grain roundness and the diversity of zircon crystal morphologies suggest that most of the Cretaceous-aged zircons were derived from plutonic sources. Intrusions of the Anvil Suite, located approximately 550 km westnorthwest of the Maxhamish Lake area in the mid-Cretaceous, form the likely source. Erosion of the few kilometres of sediment originally overlying the intrusions would take at least a million years and plutonic zircon would not enter the sediment supply until then. Because of this delay in plutonic zircon availability, the new detrital zircon results suggest that the Chinkeh Formation in the Maxhamish Lake area is more likely Early Albian than latest Aptian in age, and support the Early Albian age assigned on the basis of foraminifera. Detrital zircon geochronology has proven to be a very useful tool in differentiating the Chinkeh Formation from similar Triassic strata. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
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 | 0,005 | 0,009 |
| Études des sciences et des technologies | 0,002 | 0,000 |
| Communication savante | 0,002 | 0,001 |
| Science ouverte | 0,001 | 0,001 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,016 | 0,003 |
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 ».