A chronology of post-glacial mass-transport deposits on the Canadian Beaufort Slope

Highlights • First chronology of post glacial mass transport deposits in Canadian Beaufort Sea. • Chrono-stratigraphy based on 14C dating of foraminifera and shells. • Type-section seismo-stratigraphy from sub-bottom profiler data was established. • Average recurrence rate of 1 failure event per 100...

Full description

Bibliographic Details
Published in:Marine Geology
Main Authors: Riedel, Michael, King, E. L., Cameron, G. D. M., Blasco, S., Conway, K. W., Dallimore, S. R., Rohr, K. M. M., Jin, Y. K., Hong, J. K.
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2021
Subjects:
Online Access:https://oceanrep.geomar.de/id/eprint/51656/
https://oceanrep.geomar.de/id/eprint/51656/1/Riedel%20etal.pdf
https://oceanrep.geomar.de/id/eprint/51656/9/Riedel_SupplementaryData_Revision2.pdf
https://oceanrep.geomar.de/id/eprint/51656/15/Riedel.pdf
https://doi.org/10.1016/j.margeo.2020.106407
id ftoceanrep:oai:oceanrep.geomar.de:51656
record_format openpolar
spelling ftoceanrep:oai:oceanrep.geomar.de:51656 2024-02-11T10:02:30+01:00 A chronology of post-glacial mass-transport deposits on the Canadian Beaufort Slope Riedel, Michael King, E. L. Cameron, G. D. M. Blasco, S. Conway, K. W. Dallimore, S. R. Rohr, K. M. M. Jin, Y. K. Hong, J. K. 2021-03 text https://oceanrep.geomar.de/id/eprint/51656/ https://oceanrep.geomar.de/id/eprint/51656/1/Riedel%20etal.pdf https://oceanrep.geomar.de/id/eprint/51656/9/Riedel_SupplementaryData_Revision2.pdf https://oceanrep.geomar.de/id/eprint/51656/15/Riedel.pdf https://doi.org/10.1016/j.margeo.2020.106407 en eng Elsevier https://oceanrep.geomar.de/id/eprint/51656/1/Riedel%20etal.pdf https://oceanrep.geomar.de/id/eprint/51656/9/Riedel_SupplementaryData_Revision2.pdf https://oceanrep.geomar.de/id/eprint/51656/15/Riedel.pdf Riedel, M. , King, E. L., Cameron, G. D. M., Blasco, S., Conway, K. W., Dallimore, S. R., Rohr, K. M. M., Jin, Y. K. and Hong, J. K. (2021) A chronology of post-glacial mass-transport deposits on the Canadian Beaufort Slope. Open Access Marine Geology, 433 . Art.Nr. 106407. DOI 10.1016/j.margeo.2020.106407 <https://doi.org/10.1016/j.margeo.2020.106407>. doi:10.1016/j.margeo.2020.106407 info:eu-repo/semantics/openAccess Article PeerReviewed 2021 ftoceanrep https://doi.org/10.1016/j.margeo.2020.106407 2024-01-15T00:22:57Z Highlights • First chronology of post glacial mass transport deposits in Canadian Beaufort Sea. • Chrono-stratigraphy based on 14C dating of foraminifera and shells. • Type-section seismo-stratigraphy from sub-bottom profiler data was established. • Average recurrence rate of 1 failure event per 1000 yrs., but events are clustered. • Highest number of failure events just prior to the Younger Dryas. Abstract Extent and chronology of 24 buried and seabed-exposed mass transport deposits (MTDs) on the continental slope of the Canadian Beaufort Sea were compiled towards a regional geo-hazard assessment of the Beaufort region. A total of 2220 lines of 3.5 kHz sub-bottom profiler (SBP) data (~40,000-line kilometres) covering an area of 9740 km2 were analyzed to allow a new understanding of slope instability in the region. Several sediment cores acquired across the region allow dating of the sediment cover. A regionally representative seismic-stratigraphy (type section, ca. 60 m thick) of the stratified sediments mantling the slope was defined. The MTDs all occur above a marked change in sedimentation style from a deeper-situated slope fan that varies substantially laterally to the above-lying stratified layers that host the MTDs. The type section comprises three sedimentary units bound by two prominent markers. Relative ages for the MTDs were defined by measuring the thickness of sediments overlying each MTD and linking that sediment package to the type section. Two 3-D seismic data volumes across the study region verified interpretations from 2D data by imaging internal deposit character and down-slope continuity of the MTDs. Seismic amplitude and similarity attributes enabled identification of further MTD events, incompletely imaged by the SBP data. A composite chronostratigraphy based on 14C dating of foraminifera and shells was assembled despite the fact that the type section is far thicker than sediment coring limits. Sub-unit thickness varies up- and down-slope such that a selection of cores across the study ... Article in Journal/Newspaper Beaufort Sea OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Beaufort Slope ENVELOPE(-145.000,-145.000,71.000,71.000) Marine Geology 433 106407
institution Open Polar
collection OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
op_collection_id ftoceanrep
language English
description Highlights • First chronology of post glacial mass transport deposits in Canadian Beaufort Sea. • Chrono-stratigraphy based on 14C dating of foraminifera and shells. • Type-section seismo-stratigraphy from sub-bottom profiler data was established. • Average recurrence rate of 1 failure event per 1000 yrs., but events are clustered. • Highest number of failure events just prior to the Younger Dryas. Abstract Extent and chronology of 24 buried and seabed-exposed mass transport deposits (MTDs) on the continental slope of the Canadian Beaufort Sea were compiled towards a regional geo-hazard assessment of the Beaufort region. A total of 2220 lines of 3.5 kHz sub-bottom profiler (SBP) data (~40,000-line kilometres) covering an area of 9740 km2 were analyzed to allow a new understanding of slope instability in the region. Several sediment cores acquired across the region allow dating of the sediment cover. A regionally representative seismic-stratigraphy (type section, ca. 60 m thick) of the stratified sediments mantling the slope was defined. The MTDs all occur above a marked change in sedimentation style from a deeper-situated slope fan that varies substantially laterally to the above-lying stratified layers that host the MTDs. The type section comprises three sedimentary units bound by two prominent markers. Relative ages for the MTDs were defined by measuring the thickness of sediments overlying each MTD and linking that sediment package to the type section. Two 3-D seismic data volumes across the study region verified interpretations from 2D data by imaging internal deposit character and down-slope continuity of the MTDs. Seismic amplitude and similarity attributes enabled identification of further MTD events, incompletely imaged by the SBP data. A composite chronostratigraphy based on 14C dating of foraminifera and shells was assembled despite the fact that the type section is far thicker than sediment coring limits. Sub-unit thickness varies up- and down-slope such that a selection of cores across the study ...
format Article in Journal/Newspaper
author Riedel, Michael
King, E. L.
Cameron, G. D. M.
Blasco, S.
Conway, K. W.
Dallimore, S. R.
Rohr, K. M. M.
Jin, Y. K.
Hong, J. K.
spellingShingle Riedel, Michael
King, E. L.
Cameron, G. D. M.
Blasco, S.
Conway, K. W.
Dallimore, S. R.
Rohr, K. M. M.
Jin, Y. K.
Hong, J. K.
A chronology of post-glacial mass-transport deposits on the Canadian Beaufort Slope
author_facet Riedel, Michael
King, E. L.
Cameron, G. D. M.
Blasco, S.
Conway, K. W.
Dallimore, S. R.
Rohr, K. M. M.
Jin, Y. K.
Hong, J. K.
author_sort Riedel, Michael
title A chronology of post-glacial mass-transport deposits on the Canadian Beaufort Slope
title_short A chronology of post-glacial mass-transport deposits on the Canadian Beaufort Slope
title_full A chronology of post-glacial mass-transport deposits on the Canadian Beaufort Slope
title_fullStr A chronology of post-glacial mass-transport deposits on the Canadian Beaufort Slope
title_full_unstemmed A chronology of post-glacial mass-transport deposits on the Canadian Beaufort Slope
title_sort chronology of post-glacial mass-transport deposits on the canadian beaufort slope
publisher Elsevier
publishDate 2021
url https://oceanrep.geomar.de/id/eprint/51656/
https://oceanrep.geomar.de/id/eprint/51656/1/Riedel%20etal.pdf
https://oceanrep.geomar.de/id/eprint/51656/9/Riedel_SupplementaryData_Revision2.pdf
https://oceanrep.geomar.de/id/eprint/51656/15/Riedel.pdf
https://doi.org/10.1016/j.margeo.2020.106407
long_lat ENVELOPE(-145.000,-145.000,71.000,71.000)
geographic Beaufort Slope
geographic_facet Beaufort Slope
genre Beaufort Sea
genre_facet Beaufort Sea
op_relation https://oceanrep.geomar.de/id/eprint/51656/1/Riedel%20etal.pdf
https://oceanrep.geomar.de/id/eprint/51656/9/Riedel_SupplementaryData_Revision2.pdf
https://oceanrep.geomar.de/id/eprint/51656/15/Riedel.pdf
Riedel, M. , King, E. L., Cameron, G. D. M., Blasco, S., Conway, K. W., Dallimore, S. R., Rohr, K. M. M., Jin, Y. K. and Hong, J. K. (2021) A chronology of post-glacial mass-transport deposits on the Canadian Beaufort Slope. Open Access Marine Geology, 433 . Art.Nr. 106407. DOI 10.1016/j.margeo.2020.106407 <https://doi.org/10.1016/j.margeo.2020.106407>.
doi:10.1016/j.margeo.2020.106407
op_rights info:eu-repo/semantics/openAccess
op_doi https://doi.org/10.1016/j.margeo.2020.106407
container_title Marine Geology
container_volume 433
container_start_page 106407
_version_ 1790598511098593280