| Titre | Dimensional modelling of Quaternary deposits in South Simcoe County for groundwater applications |
| Télécharger | Téléchargement (publication entière) |
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| Licence | Veuillez noter que la Licence du gouvernement
ouvert - Canada remplace toutes les licences antérieures. |
| Auteur | Bajc, A F; Mulligan, R P M |
| Source | Regional-Scale Groundwater Geoscience in Southern Ontario: An Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario Geoscientists Open House; par Russell, H A J ; Ford, D; Holysh, S; Priebe, E H; Commission géologique du
Canada, Dossier public 8528, 2019 p. 1, https://doi.org/10.4095/313541  Accès ouvert |
| Année | 2019 |
| Séries alt. | Ontario Geological Survey, Open File Report 6349 |
| Éditeur | Ressources naturelles Canada |
| Éditeur | Gouvernement de l'Ontario |
| Réunion | Regional-Scale Groundwater Geoscience in Southern Ontario: Open House; Guelph; CA; février 27-28, 2019 |
| Document | dossier public |
| Lang. | anglais |
| DOI | https://doi.org/10.4095/313541 |
| Media | en ligne; numérique |
| Référence reliée | Cette publication est contenue dans Regional-Scale Groundwater Geoscience in Southern Ontario: An Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario Geoscientists Open House |
| Formats | pdf |
| Province | Ontario |
| SNRC | 31D/05; 31D/11; 31D/12; 31D/13; 31D/14; 41A/07; 41A/08; 41A/09; 41A/10; 41A/16 |
| Région | Simcoe County |
| Lat/Long OENS | -80.7500 -79.0000 45.0000 44.2500 |
| Sujets | eau souterraine; aquifères; établissement de modèles; ressources en eau souterraine; unités hydrostratigraphiques; dépôts postglaciaires; dépôts glaciaires; dépôts interglaciaires; elements glaciaires;
topographie du substratum rocheux; antecedents glaciaires; glaciation; étages glaciaires; Wisconsinien; Illinoien; stades interglaciaires; Sangamonien; Calotte glaciaire Laurentide; Formation de Scarborough ; Formation de Thorncliffe ; Till de
Newmarket ; Moraine d'Oak Ridges ; hydrogéologie; géologie des dépôts meubles/géomorphologie; stratigraphie; Phanérozoïque; Cénozoïque; Quaternaire; Paléozoïque; Silurien |
| Diffusé | 2019 02 08 |
| Résumé | (disponible en anglais seulement)
As part of its Groundwater Initiative, the Ontario Geological Survey has constructed a 3-dimensional (3-D) model of Quaternary deposits in South Simcoe County
for groundwater applications. A conceptual stratigraphic framework, informed by the recent acquisition of high-quality geological and geophysical data, consists of 15 hydrostratigraphic units overlying Ordovician bedrock. Although the project has
resulted in an improved understanding of bedrock topography, details of the bedrock surface including the morphology and origin of the Laurentian valley, remains still debated.
The 15 hydrostratigraphic units comprise 3 main groups. These include:
1) an Illinois Episode (or older package), consisting primarily of diamicton, overlain by non-glacial sediments spanning the Sangamon interglacial and earliest part of the Wisconsin Episode; 2) a thick (up to 125 m), Early-Middle Wisconsin
transgressive sequence of glaciolacustrine deposits (Scarborough and Thorncliffe Formation equivalents) laid down in a high-level lake bordered by the advancing Laurentide Ice Sheet (LIS). Subsequent overriding of the lake basin by the LIS initiated
deposition of the Late Wisconsin Newmarket Till which continued during and after multiple phases of tunnel valley erosion; and 3) a mixed package of late glacial and post-glacial gravel, sand, silt and clay associated with the interlobate Oak Ridges
Moraine along the southern margin of the study area, kame terrace deposits along the Niagara Escarpment and glaciolacustrine sediments in low-lying areas.
The soon to be released 3-D model, with a block size of 100 m, and accompanying Groundwater
Resources Study report supplements previously released datasets, including results of geophysical surveys and continuously cored boreholes. These data provide an improved understanding of the distribution, architecture and facies variability of
sediments comprising the Quaternary succession for future hydrogeologic modelling exercises. Outputs include an abbreviated version of the subsurface database (including stratigraphic picks) used for the creation of the model, a series of both
continuous and discontinuous surfaces for hydrogeologic modelling (available as both ArcGIS and ASCII grids), structural contour and isopach plots with accompanying maps showing the distribution and quality of data used in their generation, and N-S
and E-W cross-sections plotted at 2 km intervals using both a hydrostratigraphic legend and a simplified aquifer-aquitard-bedrock scheme. Derivative products include aquifer recharge and vulnerability maps. Much of this information will be viewable
in a Google Earth platform for enhanced interactive viewing and interpretation. |
| Sommaire | (Résumé en langage clair et simple, non publié)
Volume des résumés pour la Commission géologique de l'Ontario et la commission geologique du Canada géoscience des eaux souterraines de la CGC
portes ouvertes avec conservation Ontario. |
| GEOSCAN ID | 313541 |
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