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TitleImpact structures of the Western Sedimentary Basin of North America: New discoveries and hydrocarbon resources
AuthorGrieve, R A F; Therriault, A M; Kreis, L K
SourceEighth international Williston Basin symposium; by Christopher, J E (ed.); Gilboy, C F (ed.); Paterson, D F (ed.); Bend, S L (ed.); Saskatchewan Geological Society Special Publication no. 13, 1998 p. 189-201 Open Access logo Open Access
LinksOnline - En ligne
Alt SeriesGeological Survey of Canada, Contribution Series 1998096
PublisherSaskatchewan Geological Society
MeetingEighth International Williston Basin Symposium; Regina; CA; October 19-21, 1998
Mediapaper; on-line; digital
File formathtml
ProvinceAlberta; Saskatchewan
NTS84N/11; 72E/09; 72F/14SE; 72J/15NE; 62E/11SE
AreaSteen River; Eagle Butte; Maple Creek; Elbow; Viewfield
Lat/Long WENS-118.0000 -103.0000 60.0000 49.5000
Subjectsextraterrestrial geology; structural geology; fossil fuels; metamorphism, shock; hydrocarbons; meteorite craters; hydrocarbon potential; Western Sedimentary Basin; Willistone Basin; Elbow Impact Structure; Maple Creek Impact Structure; Viewfield Impact Structure; Newporte Impact Structure; Red Wing Creek Impact Structure; Steen River Impact Structure; Ames Impact Structure; Avak Impact Structure; Calvin Impact Structure; Marquez Impact Structure; Sierra Madera Impact Structure; Campeche Bank Impact Structure; Cretaceous; Tertiary
Illustrationstables; cross-sections; graphs
AbstractSeven impact structures are now known from the Western Sedimentary Basin of North America. This contribution reports on the discovery of shock metamorphic effects at three of these structures: Elbow, Maple Creek and Viewfield, all in Saskatchewan. It also describes their general character and that of the other impact structures in the basin. Particular emphasis is placed on the production of hydrocarbons from these structures, which ranges from none to 1000 BOPD (at Red Wing Creek, North Dakota). Other hydrocarbon-producing impact structures in Canada, Mexico and the United States are briefly characterized along with their productivity. Most production at impact structures occurs from structural traps in the rim and central uplift and from brecciated target rocks, including crystalline rocks. The most productive impact-related hydrocarbon reservoir rocks are breccias in the Gulf of Mexico believed to be genetically linked to the K/T impact that formed the Chicxulub structure on the Yucatan Peninsula, Mexico. Many impact structures remain to be discovered throughout the world. For example, the current estimate of the terrestrial cratering rate indicates that as many as 12 + 6 impact structures with diameters of 10 km or greater remain to be discovered in the Williston Basin. If half of them have reserves similar to the 9 km diameter Red Wing Creek structure, the cumulative potential impact-related reserves are in the order of 1 BBO and 600 BCFG in the Williston Basin alone.

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