Stratigraphic significance of ooidal ironstones from the cretaceous western interior seaway: The peace river formation, Alberta, Canada, and the castlegate sandstone, Utah, U.S.A.
Ooidal ironstones form prominent units, and an appreciation of their sedimentological and stratigraphic significance is important for the interpretation of sedimentary successions. Ooidal iron-stones from the Albian Paddy Member of the Peace River Formation, Alberta, Canada, and the Campanian Castle...
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ftumanchesterpub:oai:pure.atira.dk:publications/f2ba0287-c736-4bc3-835d-9435029ebed2 2023-11-12T04:24:18+01:00 Stratigraphic significance of ooidal ironstones from the cretaceous western interior seaway: The peace river formation, Alberta, Canada, and the castlegate sandstone, Utah, U.S.A. Taylor, Kevin G. Simo, J. A. Yocum, Dan Leckie, Dale A. 2002 https://research.manchester.ac.uk/en/publications/f2ba0287-c736-4bc3-835d-9435029ebed2 https://doi.org/10.1306/060801720316 eng eng info:eu-repo/semantics/closedAccess Taylor , K G , Simo , J A , Yocum , D & Leckie , D A 2002 , ' Stratigraphic significance of ooidal ironstones from the cretaceous western interior seaway: The peace river formation, Alberta, Canada, and the castlegate sandstone, Utah, U.S.A. ' , Journal of Sedimentary Research , vol. 72 , no. 2 , pp. 316-327 . https://doi.org/10.1306/060801720316 article 2002 ftumanchesterpub https://doi.org/10.1306/060801720316 2023-10-30T09:11:07Z Ooidal ironstones form prominent units, and an appreciation of their sedimentological and stratigraphic significance is important for the interpretation of sedimentary successions. Ooidal iron-stones from the Albian Paddy Member of the Peace River Formation, Alberta, Canada, and the Campanian Castlegate Sandstone of the Mesaverde Group in Colorado have been analyzed. The ooidal ironstones are associated with a major sequence boundary and subsequent transgressive surface. Both are interpreted to have been deposited under conditions of low net sediment accumulation in well-oxygenated bottom-water conditions, with episodic storm events reworking the sediments. The Paddy Member ironstone is interpreted to have been deposited in an estuarine environment, and the Castlegate ironstone is interpreted to have been deposited in a shallow-marine environment. Both ironstones are dominated by berthierine ooids and grain-rimming and pore-filling siderite, with later ferroan dolomite and calcite in the Castlegate ooidal ironstone. Petrographic, geochemical, and isotopic evidence, coupled with thermodynamic considerations, indicates that the ooidal ironstone mineralogy formed during suboxic diagenesis. The conditions required for suboxic diagenesis were extensive sediment reworking and slow net sediment accumulation rates. We propose that these conditions arose as a result of marine transgression during the initial relative sea-level rise following the development of a sequence boundary. Ooidal ironstone formation ceased once sedimentation rates increased and transgression deepened water depths considerably. These results illustrate the association between ooidal ironstones and major stratal surfaces in sedimentary successions, and highlights the complexity that early diagenesis at such surfaces can take. Copyright © 2002, SEPM (Society for Sedimentary Geology). Article in Journal/Newspaper Peace River The University of Manchester: Research Explorer Canada Journal of Sedimentary Research 72 2 316 327 |
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The University of Manchester: Research Explorer |
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ftumanchesterpub |
language |
English |
description |
Ooidal ironstones form prominent units, and an appreciation of their sedimentological and stratigraphic significance is important for the interpretation of sedimentary successions. Ooidal iron-stones from the Albian Paddy Member of the Peace River Formation, Alberta, Canada, and the Campanian Castlegate Sandstone of the Mesaverde Group in Colorado have been analyzed. The ooidal ironstones are associated with a major sequence boundary and subsequent transgressive surface. Both are interpreted to have been deposited under conditions of low net sediment accumulation in well-oxygenated bottom-water conditions, with episodic storm events reworking the sediments. The Paddy Member ironstone is interpreted to have been deposited in an estuarine environment, and the Castlegate ironstone is interpreted to have been deposited in a shallow-marine environment. Both ironstones are dominated by berthierine ooids and grain-rimming and pore-filling siderite, with later ferroan dolomite and calcite in the Castlegate ooidal ironstone. Petrographic, geochemical, and isotopic evidence, coupled with thermodynamic considerations, indicates that the ooidal ironstone mineralogy formed during suboxic diagenesis. The conditions required for suboxic diagenesis were extensive sediment reworking and slow net sediment accumulation rates. We propose that these conditions arose as a result of marine transgression during the initial relative sea-level rise following the development of a sequence boundary. Ooidal ironstone formation ceased once sedimentation rates increased and transgression deepened water depths considerably. These results illustrate the association between ooidal ironstones and major stratal surfaces in sedimentary successions, and highlights the complexity that early diagenesis at such surfaces can take. Copyright © 2002, SEPM (Society for Sedimentary Geology). |
format |
Article in Journal/Newspaper |
author |
Taylor, Kevin G. Simo, J. A. Yocum, Dan Leckie, Dale A. |
spellingShingle |
Taylor, Kevin G. Simo, J. A. Yocum, Dan Leckie, Dale A. Stratigraphic significance of ooidal ironstones from the cretaceous western interior seaway: The peace river formation, Alberta, Canada, and the castlegate sandstone, Utah, U.S.A. |
author_facet |
Taylor, Kevin G. Simo, J. A. Yocum, Dan Leckie, Dale A. |
author_sort |
Taylor, Kevin G. |
title |
Stratigraphic significance of ooidal ironstones from the cretaceous western interior seaway: The peace river formation, Alberta, Canada, and the castlegate sandstone, Utah, U.S.A. |
title_short |
Stratigraphic significance of ooidal ironstones from the cretaceous western interior seaway: The peace river formation, Alberta, Canada, and the castlegate sandstone, Utah, U.S.A. |
title_full |
Stratigraphic significance of ooidal ironstones from the cretaceous western interior seaway: The peace river formation, Alberta, Canada, and the castlegate sandstone, Utah, U.S.A. |
title_fullStr |
Stratigraphic significance of ooidal ironstones from the cretaceous western interior seaway: The peace river formation, Alberta, Canada, and the castlegate sandstone, Utah, U.S.A. |
title_full_unstemmed |
Stratigraphic significance of ooidal ironstones from the cretaceous western interior seaway: The peace river formation, Alberta, Canada, and the castlegate sandstone, Utah, U.S.A. |
title_sort |
stratigraphic significance of ooidal ironstones from the cretaceous western interior seaway: the peace river formation, alberta, canada, and the castlegate sandstone, utah, u.s.a. |
publishDate |
2002 |
url |
https://research.manchester.ac.uk/en/publications/f2ba0287-c736-4bc3-835d-9435029ebed2 https://doi.org/10.1306/060801720316 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Peace River |
genre_facet |
Peace River |
op_source |
Taylor , K G , Simo , J A , Yocum , D & Leckie , D A 2002 , ' Stratigraphic significance of ooidal ironstones from the cretaceous western interior seaway: The peace river formation, Alberta, Canada, and the castlegate sandstone, Utah, U.S.A. ' , Journal of Sedimentary Research , vol. 72 , no. 2 , pp. 316-327 . https://doi.org/10.1306/060801720316 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1306/060801720316 |
container_title |
Journal of Sedimentary Research |
container_volume |
72 |
container_issue |
2 |
container_start_page |
316 |
op_container_end_page |
327 |
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1782338792748744704 |