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The AAPG/Datapages Combined Publications Database
AAPG Bulletin
Abstract
AAPG Bulletin, V.
Sedimentation in a low-accommodation setting: Nonmarine (Cretaceous) Mannville and marine (Jurassic) Ellis groups, Manyberries field, southeastern Alberta
Dale A. Leckie,1 Karen E. Wallace-Dudley,2 Nancy A. Vanbeselaere,3 David P. James4
1Nexen Inc., 801 7th Ave. SW, Calgary, Alberta, Canada, T2P 4H4; [email protected]
2Geological Survey of Canada, 3303 33 St., NW, Calgary, Alberta, Canada, T2L 2A7
3Rocky Mountain Consultants, 445 35 Ave. NW, Calgary, Alberta, Canada, T2K 0C2
4Anadarko Canada Ltd., 425 1st St. SW, Calgary, Alberta, Canada, T2P 4V4
AUTHORS
Dale Leckie is chief geologist at Nexen Inc. He is a specialist in sedimentology, sequence stratigraphy, and basin analysis. He has worked on Australia, Colombia, Yemen, and New Zealand basins. Leckie has received numerous awards from the AAPG, SEPM, and Canadian Society of Petroleum Geologists. He coedited AAPG Memoir 55 entitled Foreland Basins and Fold Belts and Canadian Society of Petroleum Geologists Memoir 15 entitled Sequence Stratigraphy: Surface, Subsurface and Sedimentology.
Karen Wallace-Dudley is a scientist at the Geological Survey of Canada, Calgary. She specializes in the sedimentology, stratigraphy, and petroleum geology of Jurassic and Cretaceous hydrocarbon-bearing strata in western Canada.
Nancy Vanbeselaere is the principal of Rocky Mountain Consultants. She is a specialist on Mannville stratigraphy of southern Alberta and Saskatchewan. Nancy worked for several years at Imperial Oil Limit and as a consultant at the Geological Survey of Canada.
David James is manager of geology at Anadarko Canada; his main interests are exploration, sedimentology, and sequence stratigraphy. He has worked extensively throughout the Western Canada basin, Canada's frontiers, and internationally. He has received awards from the Canadian Society of Petroleum Geologists, AAPG, and SEPM and was coeditor of Canadian Society of Petroleum Geologists Memoirs 15 and 18 on sequence stratigraphy and the Mannville Group.
ACKNOWLEDGMENTS
John Block (Scealu Modus) provided ideas on the hot shale spike at the contact between the light and dark deposits of the Swift Formation. James White (Geological Survey of Canada) and David McIntyre (Manuka Consulting) provided palynological analyses. Maria Tomika examined polished thin sections of organic matter. Greg Ludvigson (Iowa Geological Survey Bureau) provided analyses and interpretation of isotopes of the spherulitic siderite in the Success S2. Adam Yakabuskie did much of the graphics.
ABSTRACT
Nonmarine strata of the Lower Cretaceous Mannville Group and marine strata of the Upper Jurassic Ellis Group in southern Alberta were deposited in the low-accommodation, eastern, and distal margin of the Western Canada sedimentary basin. The Manyberries oil field produces hydrocarbons from preserved interfluves as well as the deposits of compound valley fills. These Mannville Group sediments provide an end-member component for nonmarine sedimentation in a low-accommodation setting. The succession is characterized by thin sediment accumulations deposited over a long period of time; multiple unconformities, some profound; incised valleys, typically compound in nature; paleosols of varying degrees and maturity; and a general absence of coal.
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