Iron ooid beds of the Carolinefjellet Formation, Spitsbergen, Norway
Iron ooid beds are unusual deposits that have been linked to greenhouse conditions and the transgressive flooding of shallow shelves, and which were globally prevalent during certain periods. Within the marine, Aptian–Albian, Carolinefjellet Formation of Spitsbergen, chamosite ooids have been found...
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ftjpolarres:oai:journals.openacademia.net:article/2862 2023-05-15T18:02:40+02:00 Iron ooid beds of the Carolinefjellet Formation, Spitsbergen, Norway Mutrux, Jeremy Maher, Harmon Shuster, Robert Hays, Troy 2008-04-01 application/pdf https://polarresearch.net/index.php/polar/article/view/2862 https://doi.org/10.3402/polar.v27i1.6152 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2862/6489 https://polarresearch.net/index.php/polar/article/view/2862 doi:10.3402/polar.v27i1.6152 Copyright (c) 2018 Polar Research Polar Research; Vol. 27 No. 1 (2008); 28-43 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2008 ftjpolarres https://doi.org/10.3402/polar.v27i1.6152 2021-11-11T19:13:21Z Iron ooid beds are unusual deposits that have been linked to greenhouse conditions and the transgressive flooding of shallow shelves, and which were globally prevalent during certain periods. Within the marine, Aptian–Albian, Carolinefjellet Formation of Spitsbergen, chamosite ooids have been found within distinctive sandstone beds at six localities, and at a consistent stratigraphic position within the basal Dalkjegla Member. Distinctive characteristics include the iron ooids themselves, a coarser grain size, intercalation with silty siderites, grading, cross-beds indicating offshore or longshore transport, and a lack of burrowing. The enclosing sands display planar and hummocky crossstratification and abundant oscillation ripple marks, and are interpreted as lagoon-attached bar complexes. The stratigraphic position and traits of the iron ooid sands are consistent with seaward storm transport and preservation within interbar swales. Ooids vary in shape considerably, and display evidence for multiple growth events. Nuclei of quartz, opaques, carbonate clasts and laminated crusts are typically encircled by finer grained tangential chamosite and opaque laminae, sometimes with outer overgrowths of calcite and/or radial chamosite. The Dalkjegla Member is the marine portion of a large-scale transgressive tract, attached to underlying fluvio-estuarine Helvetiafjellet Formation strata. A lagoonal environment associated with the basal shales of the Dalkjegla Member represents a logical setting, where riverine iron concentration and iron silicate growth could occur. The Spitsbergen iron ooid beds extend the known occurrence of Cretaceous examples, representing a less common High-Latitude example, and one not directly associated with a transgressive flooding surface. Article in Journal/Newspaper Polar Research Spitsbergen Polar Research (E-Journal) Norway Helvetiafjellet ENVELOPE(16.232,16.232,78.213,78.213) Carolinefjellet ENVELOPE(15.850,15.850,78.300,78.300) Dalkjegla ENVELOPE(17.217,17.217,77.983,77.983) Polar Research 27 1 |
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Open Polar |
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Polar Research (E-Journal) |
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ftjpolarres |
language |
English |
description |
Iron ooid beds are unusual deposits that have been linked to greenhouse conditions and the transgressive flooding of shallow shelves, and which were globally prevalent during certain periods. Within the marine, Aptian–Albian, Carolinefjellet Formation of Spitsbergen, chamosite ooids have been found within distinctive sandstone beds at six localities, and at a consistent stratigraphic position within the basal Dalkjegla Member. Distinctive characteristics include the iron ooids themselves, a coarser grain size, intercalation with silty siderites, grading, cross-beds indicating offshore or longshore transport, and a lack of burrowing. The enclosing sands display planar and hummocky crossstratification and abundant oscillation ripple marks, and are interpreted as lagoon-attached bar complexes. The stratigraphic position and traits of the iron ooid sands are consistent with seaward storm transport and preservation within interbar swales. Ooids vary in shape considerably, and display evidence for multiple growth events. Nuclei of quartz, opaques, carbonate clasts and laminated crusts are typically encircled by finer grained tangential chamosite and opaque laminae, sometimes with outer overgrowths of calcite and/or radial chamosite. The Dalkjegla Member is the marine portion of a large-scale transgressive tract, attached to underlying fluvio-estuarine Helvetiafjellet Formation strata. A lagoonal environment associated with the basal shales of the Dalkjegla Member represents a logical setting, where riverine iron concentration and iron silicate growth could occur. The Spitsbergen iron ooid beds extend the known occurrence of Cretaceous examples, representing a less common High-Latitude example, and one not directly associated with a transgressive flooding surface. |
format |
Article in Journal/Newspaper |
author |
Mutrux, Jeremy Maher, Harmon Shuster, Robert Hays, Troy |
spellingShingle |
Mutrux, Jeremy Maher, Harmon Shuster, Robert Hays, Troy Iron ooid beds of the Carolinefjellet Formation, Spitsbergen, Norway |
author_facet |
Mutrux, Jeremy Maher, Harmon Shuster, Robert Hays, Troy |
author_sort |
Mutrux, Jeremy |
title |
Iron ooid beds of the Carolinefjellet Formation, Spitsbergen, Norway |
title_short |
Iron ooid beds of the Carolinefjellet Formation, Spitsbergen, Norway |
title_full |
Iron ooid beds of the Carolinefjellet Formation, Spitsbergen, Norway |
title_fullStr |
Iron ooid beds of the Carolinefjellet Formation, Spitsbergen, Norway |
title_full_unstemmed |
Iron ooid beds of the Carolinefjellet Formation, Spitsbergen, Norway |
title_sort |
iron ooid beds of the carolinefjellet formation, spitsbergen, norway |
publisher |
Norwegian Polar Institute |
publishDate |
2008 |
url |
https://polarresearch.net/index.php/polar/article/view/2862 https://doi.org/10.3402/polar.v27i1.6152 |
long_lat |
ENVELOPE(16.232,16.232,78.213,78.213) ENVELOPE(15.850,15.850,78.300,78.300) ENVELOPE(17.217,17.217,77.983,77.983) |
geographic |
Norway Helvetiafjellet Carolinefjellet Dalkjegla |
geographic_facet |
Norway Helvetiafjellet Carolinefjellet Dalkjegla |
genre |
Polar Research Spitsbergen |
genre_facet |
Polar Research Spitsbergen |
op_source |
Polar Research; Vol. 27 No. 1 (2008); 28-43 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2862/6489 https://polarresearch.net/index.php/polar/article/view/2862 doi:10.3402/polar.v27i1.6152 |
op_rights |
Copyright (c) 2018 Polar Research |
op_doi |
https://doi.org/10.3402/polar.v27i1.6152 |
container_title |
Polar Research |
container_volume |
27 |
container_issue |
1 |
_version_ |
1766173112269799424 |