| Titre | Quartzose sands in the Lower to Middle Devonian strata of southwestern Ontario: geographic distribution and characterization in drill cuttings and geophysical logs |
| Télécharger | Téléchargements |
| Auteur | Davis, C L |
| Source | Commission géologique du Canada, Dossier public 8286, 2017, 37 pages, https://doi.org/10.4095/305359 (Accès ouvert) |
| Année | 2017 |
| Éditeur | Ressources naturelles Canada |
| Document | dossier public |
| Lang. | anglais |
| DOI | https://doi.org/10.4095/305359 |
| Media | en ligne; numérique |
| Formats | pdf |
| Province | Ontario |
| SNRC | 30L; 30M/03; 30M/04; 30M/05; 30M/12; 40G; 40I; 40J; 40O; 40P; 41A/03; 41A/04; 41B/01; 40I; 40J |
| Lat/Long OENS | -83.2500 -79.0000 44.2500 41.5000 |
| Sujets | géologie du substratum rocheux; lithologie; roches sédimentaires; grès; analyses stratigraphiques; stratigraphie systématique; nomenclature stratigraphique; modèles stratigraphiques; lithofaciès;
diagraphie géophysique; diagraphie par rayons gamma; diagraphie de densité compensée; diagraphie de sondages neutronique; puits de gaz; puits de pétrole; analyse microscopique; analyses granulométriques; analyses pétrographiques; établissement de
modèles; ressources en eau souterraine; milieu sédimentaire; Formation de Lucas ; Grès de Columbus ; Formation d'Oriskany ; Formation de Bois Blanc ; Membre de Springvale ; Groupe de Detroit River ; Bassin de Michigan ; Arche d'Algonquin ; Formation
de Dundee ; stratigraphie; sédimentologie; hydrogéologie; géophysique; Phanérozoïque; Paléozoïque; Dévonien |
| Illustrations | tables; geological sketch maps; stratigraphic charts; location maps; photomicrographs; geophysical logs; photographs |
| Programme | Aquifer Assessment & support to mapping, Géoscience des eaux souterraines |
| Diffusé | 2017 08 30 |
| Résumé | (disponible en anglais seulement)
Southern Ontario is underlain by up to 1425 metres of Paleozoic sedimentary rocks unconformably overlying a Precambrian basement complex of metamorphic and
igneous rocks. Four distinct quartzose sandstone units occur within the Middle to Lower Devonian succession: the Columbus sand lithofacies of the Lucas Formation, the Sylvania Formation, the Springvale Member of the Bois Blanc Formation, and the
Oriskany Formation. All of the sands form continuous to discontinuous beds and lenses within thick accumulations of regional limestones and dolostones. Locally, these sands are significant hosts of groundwater, oil, and/or gas due to their enhanced
porosity relative to the confining carbonates.
Information from petroleum wells drilled since the last time these sands were mapped (Bailey and Cochrane, 1985), combined with a comprehensive update of Ontario's petroleum well database, have been
used to re-examine the distribution and characterization of these sands. In this study, over 1300 wells containing Devonian-aged strata were examined using binocular microscopy of drill cuttings, geophysical well log analysis, and Geographic
Information System (GIS) queries of the Ontario Petroleum Data System (OPDS) petroleum well database. Geographic extents of all four sands have been updated, with sands identified in areas not previously documented. In other cases, stratigraphic
assignments were corrected. Petrographic characteristics of the sands, as viewed in cuttings samples, have been documented. Over 800 formation/member top picks have been added or edited, and over 200 picks were identified as erroneous and have been
deleted from the petroleum well database. The revised data has been incorporated into an ongoing and broader project to construct a 3D model of the geology and hydrogeology of the Paleozoic bedrock of southern Ontario. |
| Résumé | (Résumé en langage clair et simple, non publié)
Des corrections de données aux documents dans la bibliothèque des pétrole pétrolier et des ressources en sel de l'Ontario. Le travail a été
complété sur les sables du dévonien et a impliqué la correction de l'identification du sommet de formation des logs de forages géophysiques et des morceaux de roches. |
| GEOSCAN ID | 305359 |
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