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TitreThe Milk River transboundary aquifer in southern Alberta
TéléchargerTéléchargements
AuteurO'Connell, S
SourceCommission géologique du Canada, Dossier public 7751, 2014, 42 pages, https://doi.org/10.4095/295603
Année2014
ÉditeurRessources naturelles Canada
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/295603
Mediaen ligne; numérique
Liensreadme
Formatspdf; rtf; xls; JPEG2000; srf
ProvinceAlberta
SNRC72E/01; 72E/03; 72E/04; 82H/01
Lat/Long OENS-112.5000 -110.0000 50.2500 48.0000
Sujetsaquifères; eau souterraine; ressources en eau souterraine; régimes des eaux souterraines; modèles; établissement de modèles; roches sédimentaires; grès; lithologie; hydrogéologie; stratigraphie; Mésozoïque; Crétacé
Illustrationslocation maps; cross-sections
ProgrammeAquifer Assessment & support to mapping, Géoscience des eaux souterraines
Diffusé2014 12 17
Résumé(Sommaire disponible en anglais seulement)
The Milk River transboundary aquifer is examined in a 330 township area of southern Alberta, adjoining the US and Saskatachewan borders. The Upper Cretaceous Milk River is divided into four members. In ascending order these are: the Telegraph Creek, the Virgelle, the Deadhorse Coulee, and the Alderson members. Large regional sandstone aquifers are present within the Virgelle and the Upper Alderson members. The Virge lie aquifer covers 1 7 5 townships in the southeastern and central part of the study area, and is up to 69m thick. The Virgelle forms a continuous sand sheet that consists of a number of amalgamated, NW-SE trending shoreface units. The Virgelle aquifer is underlain by offshore marine shales of the Telegraph Creek Member, and overlain by the non-marine muds and coals of the Deadhorse Coulee Member. The Virgelle aquifer is eroded at its northern and eastern edge along a regional unconformity surface. The overlying Alderson Member consists predominantly of offshore marine shales and low-permeability muddy fine-grained sands and silts, which hosts the Milk River gas fields. Within the upper part of the Alderson Member there are two large sand bodies which form the Upper Alderson aquifer. These sands extend over an area of 44 townships, and are up to 22m in thick. The Upper Alderson sand bodies were deposited in shoreface environments and parallel the underlying erosional edge of the Virgelle aquifer sands. The Virgelle and Upper Alderson aquifers are separated from each other by muddy sediments of the Alderson and Deadhorse Coulee members, but they are locally in contact at the Virgelle erosional edge and water flow between the two aquifers is likely. Both the Virge lie and Upper Alderson sandstones terminate well to the south of the Milk River gas field. The aquifers have no direct lithological contact with the field which are entirely contained within the low permeability rocks of the Alderson Member.
Résumé(Résumé en langage clair et simple, non publié)
Ce rapport a été réalisé en mars 2011 par S.O'Connell, consultant de Belfield Resources Inc dans le cadre du projet MiRTAP de la CGC-Québec. L'aquifère Milk River a été étudié dans une zone de 330 townships dans le sud de l'Alberta. La formation Milk River, qui date du Crétacé Supérieur est divisé en 4 membres : Telegraph Creek, Virgelle, Deadhorse Coulee et Alderson. De larges aquifères de grès régionaux se trouvent dans les membres Virgelle et Upper Alderson. 2,207 puits industriels ont été cartographiés. Cette étude contient des cartes isopaques des membres de la Milk River Formation dans le sud de l'Alberta. Neuf cartes ont été construites a une échelle de 1 : 300,000. Il est à noter que les données sont manquantes dans une zone d'environ 14 townships, qui correspond à la zone d'affleurement de la formation Milk River.
GEOSCAN ID295603