Late Ordovician-Early Silurian conodont biostratigraphy and thermal maturity, Hudson Bay Basin
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Résumé
Research Article| September 01, 2007 Late Ordovician–Early Silurian conodont biostratigraphy and thermal maturity, Hudson Bay Basin Shunxin Zhang; Shunxin Zhang Canada–Nunavut Geoscience Office, P.O. Box 2319, Iqaluit, NU X0A 0H0, shzhang@NRCan.gc.ca Search for other works by this author on: GSW Google Scholar Christopher R. Barnes Christopher R. Barnes School of Earth and Ocean Sciences, University of Victoria, P.O. Box 1700, Victoria, BC V8W 2Y2 Search for other works by this author on: GSW Google Scholar Bulletin of Canadian Petroleum Geology (2007) 55 (3): 179–216. https://doi.org/10.2113/gscpgbull.55.3.179 Article history received: 26 Mar 2007 accepted: 03 Jul 2007 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Shunxin Zhang, Christopher R. Barnes; Late Ordovician–Early Silurian conodont biostratigraphy and thermal maturity, Hudson Bay Basin. Bulletin of Canadian Petroleum Geology 2007;; 55 (3): 179–216. doi: https://doi.org/10.2113/gscpgbull.55.3.179 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 Hudson Bay Basin is one of the largest Palaeozoic sedimentary basins in North America. It was explored for hydrocarbon resources, at a reconnaissance scale, more than 30 years ago, although the exploration potential remains largely untested. The lower part of the basin succession comprises approximately 600–1040 m of Upper Ordovician (Bad Cache Rapids and Churchill River groups and Red Head Rapids Formation) and Lower Silurian (Severn River, Ekwan River, Attawapiskat and Kenogami River formations) strata. These formations mainly comprise carbonate rocks consisting of alternating fossiliferous limestone, evaporitic and reefal dolostone, and minor shale.A study of 4500 conodonts from 390 conodont-bearing samples from continuous cores and well cuttings from six exploration wells in the Hudson Bay Lowlands and offshore area has revealed 50 species representing 28 genera. The conodont studies have significantly improved our understanding of the Early Paleozoic geology by providing:clear definition of conodont zones and their stratigraphic ranges. Seven zones are established for the Upper Ordovician–Lower Silurian interval, namely the Belodina confluens, Amorphognathus ordovicicus, Rhipidognathus symmetricus, Ozarkodina elibata, Kockelella? trifurcata and Distomodus staurognathoides interval zones, as well as the Pterospathodus celloni–P. eopennatus Assemblage Zone.precise biostratigraphic control for the different formations. Upper Ordovician formations are dated as late Caradocian–late Ashgillian with the Maysvillian or part of Maysvillian and Gamachian missing: Lower Silurian formations are dated as early Rhuddanian–middle Telychian, Llandovery.recognition of sea-level events based on the stratigraphic distribution and known ecologic partitioning of key conodont species in wells representing a shallow to deep gradient.definition of the position of the Ordovician–Silurian boundary, typically associated with the global hiatus created by the terminal Ordovician glaciation.Most of the conodonts from the six wells studied have a Colour Alteration Index (CAI) value of 1, indicating little alteration of organic matter and that the strata have not reached burial temperatures greater than 80°C. However, slightly higher CAI values are recorded from the deepest part of the wells in the offshore area of the basin, indicating burial temperatures just within the oil window. The Late Ordovician Boas River oil shale, which is inferred to have significant potential as a source rock and occurs at the surface along the northern part of the basin, does not appear to be present in the wells. 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 | 0,001 | 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) | 0,001 | 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 ».