Early Cretaceous methane seepage system and associated carbonates, biota and geochemistry, Sverdrup Basin, Ellef Ringnes Island, Nunavut
Over one hundred carbonate deposits, interpreted as having formed at methane seepage sites in the Sverdrup Basin have been discovered on Ellef Ringnes Island, Canadian Arctic. The deposits, up to 2.7 metres tall and 60 metres wide, are found within the lower member of the Lower Cretaceous Christophe...
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ftunivcalgary:oai:prism.ucalgary.ca:11023/1102 2023-08-27T04:06:57+02:00 Early Cretaceous methane seepage system and associated carbonates, biota and geochemistry, Sverdrup Basin, Ellef Ringnes Island, Nunavut Williscroft, Krista Beauchamp, Benoit Grasby, Stephen 2013 application/pdf http://hdl.handle.net/11023/1102 https://doi.org/10.11575/PRISM/25767 eng eng Graduate Studies University of Calgary Calgary Williscroft, K. (2013). Early Cretaceous methane seepage system and associated carbonates, biota and geochemistry, Sverdrup Basin, Ellef Ringnes Island, Nunavut (Unpublished master's thesis). University of Calgary, Calgary, AB. doi:10.11575/PRISM/25767 http://dx.doi.org/10.11575/PRISM/25767 http://hdl.handle.net/11023/1102 University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission. Biogeochemistry Geochemistry Geology Arctic Methane Seep Carbonate Ellef Ringnes master thesis 2013 ftunivcalgary https://doi.org/10.11575/PRISM/25767 2023-08-06T06:31:51Z Over one hundred carbonate deposits, interpreted as having formed at methane seepage sites in the Sverdrup Basin have been discovered on Ellef Ringnes Island, Canadian Arctic. The deposits, up to 2.7 metres tall and 60 metres wide, are found within the lower member of the Lower Cretaceous Christopher Formation, a silty marine shale. The carbonates have complex and heterogeneous structures typical of seep carbonates, including banded botryoidal and clotted textures as well as void filling sparite. Stable carbon isotopes show highly 13C-depleted values, as low as δ13CVPDB = -53‰, indicative of authigenic carbonate precipitation via the anaerobic oxidation of biogenic methane. Abundant and well-preserved fauna include multiple species of bivalves, worm tubes, ammonites and gastropods. Methane seepage is calculated to have lasted ~500,000 years and was brought about by a tensional stress regime as well as salt diapirism related faulting. Master Thesis arctic methane Arctic Ellef Ringnes Island Nunavut sverdrup basin PRISM - University of Calgary Digital Repository Arctic Nunavut Ellef Ringnes Island ENVELOPE(-102.256,-102.256,78.502,78.502) |
institution |
Open Polar |
collection |
PRISM - University of Calgary Digital Repository |
op_collection_id |
ftunivcalgary |
language |
English |
topic |
Biogeochemistry Geochemistry Geology Arctic Methane Seep Carbonate Ellef Ringnes |
spellingShingle |
Biogeochemistry Geochemistry Geology Arctic Methane Seep Carbonate Ellef Ringnes Williscroft, Krista Early Cretaceous methane seepage system and associated carbonates, biota and geochemistry, Sverdrup Basin, Ellef Ringnes Island, Nunavut |
topic_facet |
Biogeochemistry Geochemistry Geology Arctic Methane Seep Carbonate Ellef Ringnes |
description |
Over one hundred carbonate deposits, interpreted as having formed at methane seepage sites in the Sverdrup Basin have been discovered on Ellef Ringnes Island, Canadian Arctic. The deposits, up to 2.7 metres tall and 60 metres wide, are found within the lower member of the Lower Cretaceous Christopher Formation, a silty marine shale. The carbonates have complex and heterogeneous structures typical of seep carbonates, including banded botryoidal and clotted textures as well as void filling sparite. Stable carbon isotopes show highly 13C-depleted values, as low as δ13CVPDB = -53‰, indicative of authigenic carbonate precipitation via the anaerobic oxidation of biogenic methane. Abundant and well-preserved fauna include multiple species of bivalves, worm tubes, ammonites and gastropods. Methane seepage is calculated to have lasted ~500,000 years and was brought about by a tensional stress regime as well as salt diapirism related faulting. |
author2 |
Beauchamp, Benoit Grasby, Stephen |
format |
Master Thesis |
author |
Williscroft, Krista |
author_facet |
Williscroft, Krista |
author_sort |
Williscroft, Krista |
title |
Early Cretaceous methane seepage system and associated carbonates, biota and geochemistry, Sverdrup Basin, Ellef Ringnes Island, Nunavut |
title_short |
Early Cretaceous methane seepage system and associated carbonates, biota and geochemistry, Sverdrup Basin, Ellef Ringnes Island, Nunavut |
title_full |
Early Cretaceous methane seepage system and associated carbonates, biota and geochemistry, Sverdrup Basin, Ellef Ringnes Island, Nunavut |
title_fullStr |
Early Cretaceous methane seepage system and associated carbonates, biota and geochemistry, Sverdrup Basin, Ellef Ringnes Island, Nunavut |
title_full_unstemmed |
Early Cretaceous methane seepage system and associated carbonates, biota and geochemistry, Sverdrup Basin, Ellef Ringnes Island, Nunavut |
title_sort |
early cretaceous methane seepage system and associated carbonates, biota and geochemistry, sverdrup basin, ellef ringnes island, nunavut |
publisher |
Graduate Studies |
publishDate |
2013 |
url |
http://hdl.handle.net/11023/1102 https://doi.org/10.11575/PRISM/25767 |
long_lat |
ENVELOPE(-102.256,-102.256,78.502,78.502) |
geographic |
Arctic Nunavut Ellef Ringnes Island |
geographic_facet |
Arctic Nunavut Ellef Ringnes Island |
genre |
arctic methane Arctic Ellef Ringnes Island Nunavut sverdrup basin |
genre_facet |
arctic methane Arctic Ellef Ringnes Island Nunavut sverdrup basin |
op_relation |
Williscroft, K. (2013). Early Cretaceous methane seepage system and associated carbonates, biota and geochemistry, Sverdrup Basin, Ellef Ringnes Island, Nunavut (Unpublished master's thesis). University of Calgary, Calgary, AB. doi:10.11575/PRISM/25767 http://dx.doi.org/10.11575/PRISM/25767 http://hdl.handle.net/11023/1102 |
op_rights |
University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission. |
op_doi |
https://doi.org/10.11575/PRISM/25767 |
_version_ |
1775347656672935936 |