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- W2146180761 abstract "Research Article| March 01, 2006 Paleokarst in Middle Devonian Winnipegosis mud mounds, subsurface of south-central Saskatchewan, Canada Qilong Fu; Qilong Fu Department of Geology, University of Regina, Regina, SK S4S 0A2 Search for other works by this author on: GSW Google Scholar Hairuo Qing; Hairuo Qing Department of Geology, University of Regina, Regina, SK S4S 0A2 Search for other works by this author on: GSW Google Scholar Katherine M. Bergman Katherine M. Bergman Department of Geology, University of Regina, Regina, SK S4S 0A2 Search for other works by this author on: GSW Google Scholar Bulletin of Canadian Petroleum Geology (2006) 54 (1): 22–36. https://doi.org/10.2113/54.1.22 Article history received: 25 Nov 2004 accepted: 07 Nov 2005 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 Qilong Fu, Hairuo Qing, Katherine M. Bergman; Paleokarst in Middle Devonian Winnipegosis mud mounds, subsurface of south-central Saskatchewan, Canada. Bulletin of Canadian Petroleum Geology 2006;; 54 (1): 22–36. doi: https://doi.org/10.2113/54.1.22 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 Paleokarst of the Winnipegosis mud mounds is mainly characterized by extensive solution features and cavity deposits. Solution features vary from millimetre-size vugs/channels to metre-scale caverns. Most solution voids are filled with anhydrite and/or carbonate deposits. “Swiss-cheese” type porosities appear as oval to irregular pore networks and most of them remain open. Erosional surfaces are observed in several cores. Fractures and breccia fragments are small-scale and commonly associated with solution features or calcretes. Cavity sediments are dominantly detrital dolomite, interpreted as a product of weathering of the host rocks. Speleothems occur in vugs and channels but are not abundant. Caverns and large vugs likely formed at or just below the water table in the phreatic zone or in a freshwater-saltwater mixing zone during subaerial exposure of the mounds. Porous “Swiss-cheese” fabrics resemble sponge-like pores that form in mixing zones of modern carbonate platforms and islands. Porosity in the Winnipegosis mounds was extensively modified by karstification and subsequent anhydrite cementation.Paleokarst occurs only in the middle and upper parts of relatively high Winnipegosis mounds with respect to the basin floor. Multiple levels of caverns and vugs are probably related to various positions of freshwater lenses corresponding to recurrent subaerial exposure and water level changes in the Elk Point Basin. Occurrence of caverns and large vugs at 55 m below the top of the mounds indicates that the mixing zone or freshwater has extended downward to this depth. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
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- W2146180761 title "Paleokarst in Middle Devonian Winnipegosis mud mounds, subsurface of south-central Saskatchewan, Canada" @default.
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