Evidence for a diachronous Late Permian marine crisis from the Canadian Arctic region
A high-resolution chemostratigraphic study of a 24-m-thick section at West Blind Fiord on Ellesmere Island (Canadian Arctic) documents stepwise environmental deterioration in the marine Sverdrup Basin during the late Changhsingian (late Late Permian) as a result of volcanic disturbances to surroundi...
Published in: | Geological Society of America Bulletin |
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Format: | Article in Journal/Newspaper |
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2012
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Online Access: | https://researchers.mq.edu.au/en/publications/f8730d21-aec2-4f4f-b39c-16b69dbaadfe https://doi.org/10.1130/B30505.1 http://www.scopus.com/inward/record.url?scp=84867366924&partnerID=8YFLogxK |
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ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/f8730d21-aec2-4f4f-b39c-16b69dbaadfe 2024-10-13T14:03:50+00:00 Evidence for a diachronous Late Permian marine crisis from the Canadian Arctic region Algeo, Thomas Henderson, Charles M. Ellwood, Brooks Rowe, Harry Elswick, Erika Bates, Steven Lyons, Timothy Hower, James C. Smith, Christina Maynard, Barry Hays, Lindsay E. Summons, Roger E. Fulton, James Freeman, Katherine H. 2012 https://researchers.mq.edu.au/en/publications/f8730d21-aec2-4f4f-b39c-16b69dbaadfe https://doi.org/10.1130/B30505.1 http://www.scopus.com/inward/record.url?scp=84867366924&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Algeo , T , Henderson , C M , Ellwood , B , Rowe , H , Elswick , E , Bates , S , Lyons , T , Hower , J C , Smith , C , Maynard , B , Hays , L E , Summons , R E , Fulton , J & Freeman , K H 2012 , ' Evidence for a diachronous Late Permian marine crisis from the Canadian Arctic region ' , Bulletin of the Geological Society of America , vol. 124 , no. 9-10 , pp. 1424-1448 . https://doi.org/10.1130/B30505.1 article 2012 ftmacquarieunicr https://doi.org/10.1130/B30505.1 2024-09-26T15:15:55Z A high-resolution chemostratigraphic study of a 24-m-thick section at West Blind Fiord on Ellesmere Island (Canadian Arctic) documents stepwise environmental deterioration in the marine Sverdrup Basin during the late Changhsingian (late Late Permian) as a result of volcanic disturbances to surrounding landmasses. A horizon within the upper Lindström Formation (datum A) is characterized by increased Fe-oxyhydroxide fluxes and weathering intensity as well as modest shifts toward more reducing watermass conditions and higher marine productivity, recording an initial disturbance that washed soils into the marine environment. The contact between chert of the Lindström Formation and silty shale of the overlying Blind Fiord Formation, which is 1.6 m higher and ~50 k.y. younger than datum A, records a large increase in detrital sediment flux, more strongly enhanced marine productivity, and a regional extinction of siliceous sponges, herein termed the "Arctic extinction event." The horizon equivalent to the latest Permian mass extinction of Tethyan shallow-marine sections is 5.6 m higher and ~100 k.y. younger than the Arctic extinction event, demonstrating the diachronous nature of the marine biotic and environmental crisis at a global scale; it is associated with intensified anoxia and possible changes in phytoplankton community composition in the study section. Marine environmental deterioration in the Sverdrup Basin, probably triggered by terrestrial ecosystem deterioration and elevated detrital sediment fluxes, was under way by the early part of the late Changhsingian, well before the onset of main-stage Siberian Traps flood basalt volcanism. The event sequence at West Blind Fiord may record the deleterious effects of early-stage explosive silicic eruptions that affected the Boreal region, possibly through deposition of toxic gas and ash within a restricted latitudinal band, while having little impact on marine ecosystems in the peri-equatorial Tethyan region. Article in Journal/Newspaper Arctic Arctic Ellesmere Island Phytoplankton sverdrup basin Macquarie University Research Portal Arctic Blind Fiord ENVELOPE(-86.266,-86.266,78.235,78.235) Ellesmere Island Geological Society of America Bulletin 124 9-10 1424 1448 |
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Open Polar |
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Macquarie University Research Portal |
op_collection_id |
ftmacquarieunicr |
language |
English |
description |
A high-resolution chemostratigraphic study of a 24-m-thick section at West Blind Fiord on Ellesmere Island (Canadian Arctic) documents stepwise environmental deterioration in the marine Sverdrup Basin during the late Changhsingian (late Late Permian) as a result of volcanic disturbances to surrounding landmasses. A horizon within the upper Lindström Formation (datum A) is characterized by increased Fe-oxyhydroxide fluxes and weathering intensity as well as modest shifts toward more reducing watermass conditions and higher marine productivity, recording an initial disturbance that washed soils into the marine environment. The contact between chert of the Lindström Formation and silty shale of the overlying Blind Fiord Formation, which is 1.6 m higher and ~50 k.y. younger than datum A, records a large increase in detrital sediment flux, more strongly enhanced marine productivity, and a regional extinction of siliceous sponges, herein termed the "Arctic extinction event." The horizon equivalent to the latest Permian mass extinction of Tethyan shallow-marine sections is 5.6 m higher and ~100 k.y. younger than the Arctic extinction event, demonstrating the diachronous nature of the marine biotic and environmental crisis at a global scale; it is associated with intensified anoxia and possible changes in phytoplankton community composition in the study section. Marine environmental deterioration in the Sverdrup Basin, probably triggered by terrestrial ecosystem deterioration and elevated detrital sediment fluxes, was under way by the early part of the late Changhsingian, well before the onset of main-stage Siberian Traps flood basalt volcanism. The event sequence at West Blind Fiord may record the deleterious effects of early-stage explosive silicic eruptions that affected the Boreal region, possibly through deposition of toxic gas and ash within a restricted latitudinal band, while having little impact on marine ecosystems in the peri-equatorial Tethyan region. |
format |
Article in Journal/Newspaper |
author |
Algeo, Thomas Henderson, Charles M. Ellwood, Brooks Rowe, Harry Elswick, Erika Bates, Steven Lyons, Timothy Hower, James C. Smith, Christina Maynard, Barry Hays, Lindsay E. Summons, Roger E. Fulton, James Freeman, Katherine H. |
spellingShingle |
Algeo, Thomas Henderson, Charles M. Ellwood, Brooks Rowe, Harry Elswick, Erika Bates, Steven Lyons, Timothy Hower, James C. Smith, Christina Maynard, Barry Hays, Lindsay E. Summons, Roger E. Fulton, James Freeman, Katherine H. Evidence for a diachronous Late Permian marine crisis from the Canadian Arctic region |
author_facet |
Algeo, Thomas Henderson, Charles M. Ellwood, Brooks Rowe, Harry Elswick, Erika Bates, Steven Lyons, Timothy Hower, James C. Smith, Christina Maynard, Barry Hays, Lindsay E. Summons, Roger E. Fulton, James Freeman, Katherine H. |
author_sort |
Algeo, Thomas |
title |
Evidence for a diachronous Late Permian marine crisis from the Canadian Arctic region |
title_short |
Evidence for a diachronous Late Permian marine crisis from the Canadian Arctic region |
title_full |
Evidence for a diachronous Late Permian marine crisis from the Canadian Arctic region |
title_fullStr |
Evidence for a diachronous Late Permian marine crisis from the Canadian Arctic region |
title_full_unstemmed |
Evidence for a diachronous Late Permian marine crisis from the Canadian Arctic region |
title_sort |
evidence for a diachronous late permian marine crisis from the canadian arctic region |
publishDate |
2012 |
url |
https://researchers.mq.edu.au/en/publications/f8730d21-aec2-4f4f-b39c-16b69dbaadfe https://doi.org/10.1130/B30505.1 http://www.scopus.com/inward/record.url?scp=84867366924&partnerID=8YFLogxK |
long_lat |
ENVELOPE(-86.266,-86.266,78.235,78.235) |
geographic |
Arctic Blind Fiord Ellesmere Island |
geographic_facet |
Arctic Blind Fiord Ellesmere Island |
genre |
Arctic Arctic Ellesmere Island Phytoplankton sverdrup basin |
genre_facet |
Arctic Arctic Ellesmere Island Phytoplankton sverdrup basin |
op_source |
Algeo , T , Henderson , C M , Ellwood , B , Rowe , H , Elswick , E , Bates , S , Lyons , T , Hower , J C , Smith , C , Maynard , B , Hays , L E , Summons , R E , Fulton , J & Freeman , K H 2012 , ' Evidence for a diachronous Late Permian marine crisis from the Canadian Arctic region ' , Bulletin of the Geological Society of America , vol. 124 , no. 9-10 , pp. 1424-1448 . https://doi.org/10.1130/B30505.1 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1130/B30505.1 |
container_title |
Geological Society of America Bulletin |
container_volume |
124 |
container_issue |
9-10 |
container_start_page |
1424 |
op_container_end_page |
1448 |
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1812808957091119104 |