Data

Beryllium isotope signatures of ice shelves and sub-ice shelf circulation

Australian Ocean Data Network
White, D. ; Fink, D. ; Post, A. ; Simon, K. ; Galton-Fenzi, B. ; Foster, S. ; Fujioka, T. ; Jeromson, M. ; Blaxell, M. ; Yokoyama, Y.
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://pid.geoscience.gov.au/dataset/ga/123230&rft.title=Beryllium isotope signatures of ice shelves and sub-ice shelf circulation&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/123230&rft.publisher=Elsevier B.V.&rft.description=Be isotopes are a useful tracer of sediment source and transport pathways but have not been widely tested in glacio-marine environments. We measured Be isotopes in a range of depositional environments from open marine, sub-ice shelf and subglacial settings throughout Prydz Bay, one of Antarctica’s largest ice drainage systems. We find that strong sub-ice shelf and bottom current circulations can advect 10Be-rich open marine sediments into an ice shelf cavity, and 10Be-poor terrestrial sediments onto the continental shelf at the ice shelf outflow, meaning that 10Be concentrations reflect sub-ice shelf circulation patterns rather than depositional environment. However, HCl-extractable 10Be/9Be ratios can provide a more robust discrimination of sediment deposited in open marine and sub-ice shelf settings. Thus, Be isotopes are a useful tracer of both environmental setting and sub-ice shelf circulation strength in both modern and paleo-ice sheet margins. Citation: Duanne A. White, David Fink, Alexandra L. Post, Krista Simon, Ben Galton-Fenzi, Simon Foster, Toshiyuki Fujioka, Matthew R. Jeromson, Marcello Blaxell, Yusuke Yokoyama, Beryllium isotope signatures of ice shelves and sub-ice shelf circulation, Earth and Planetary Science Letters, Volume 505, 2019, Pages 86-95, ISSN 0012-821X, https://doi.org/10.1016/j.epsl.2018.10.004Maintenance and Update Frequency: asNeededStatement: Article written for publication in Earth and Planetary Science Letters&rft.creator=White, D. &rft.creator=Fink, D. &rft.creator=Post, A. &rft.creator=Simon, K. &rft.creator=Galton-Fenzi, B. &rft.creator=Foster, S. &rft.creator=Fujioka, T. &rft.creator=Jeromson, M. &rft.creator=Blaxell, M. &rft.creator=Yokoyama, Y. &rft.date=2018&rft.coverage=westlimit=65.5313; southlimit=-71.5249; eastlimit=85.2188; northlimit=-63.5486&rft.coverage=westlimit=65.5313; southlimit=-71.5249; eastlimit=85.2188; northlimit=-63.5486&rft_rights=&rft_rights=Creative Commons Attribution 4.0 International Licence&rft_rights=CC-BY&rft_rights=4.0&rft_rights=http://creativecommons.org/licenses/&rft_rights=Crown Copyright ©2018&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/by/4.0&rft.type=dataset&rft.language=English Access the data
Cite Saved to MyRDA Save to MyRDA

Licence & Rights:

Open Licence view details
CC-BY

Creative Commons Attribution 4.0 International Licence
http://creativecommons.org/licenses/by/4.0

Creative Commons Attribution 4.0 International Licence

CC-BY

4.0

http://creativecommons.org/licenses/

Crown Copyright ©2018

Access:

Open

Contact Information

clientservices@ga.gov.au

Brief description

Be isotopes are a useful tracer of sediment source and transport pathways but have not been widely tested in glacio-marine environments. We measured Be isotopes in a range of depositional environments from open marine, sub-ice shelf and subglacial settings throughout Prydz Bay, one of Antarctica’s largest ice drainage systems. We find that strong sub-ice shelf and bottom current circulations can advect 10Be-rich open marine sediments into an ice shelf cavity, and 10Be-poor terrestrial sediments onto the continental shelf at the ice shelf outflow, meaning that 10Be concentrations reflect sub-ice shelf circulation patterns rather than depositional environment. However, HCl-extractable 10Be/9Be ratios can provide a more robust discrimination of sediment deposited in open marine and sub-ice shelf settings. Thus, Be isotopes are a useful tracer of both environmental setting and sub-ice shelf circulation strength in both modern and paleo-ice sheet margins. Citation: Duanne A. White, David Fink, Alexandra L. Post, Krista Simon, Ben Galton-Fenzi, Simon Foster, Toshiyuki Fujioka, Matthew R. Jeromson, Marcello Blaxell, Yusuke Yokoyama, Beryllium isotope signatures of ice shelves and sub-ice shelf circulation, Earth and Planetary Science Letters, Volume 505, 2019, Pages 86-95, ISSN 0012-821X, https://doi.org/10.1016/j.epsl.2018.10.004

Lineage

Maintenance and Update Frequency: asNeeded
Statement: Article written for publication in Earth and Planetary Science Letters

Notes

Purpose
Article written for publication in Earth and Planetary Science Letters

Created: 26 09 2018

Issued: 20 10 2023

85.2188,-63.5486 85.2188,-71.5249 65.5313,-71.5249 65.5313,-63.5486 85.2188,-63.5486

75.37505,-67.53675

text: westlimit=65.5313; southlimit=-71.5249; eastlimit=85.2188; northlimit=-63.5486

User Contributed Tags    

Login to tag this record with meaningful keywords to make it easier to discover

Other Information
Link to Journal

doi : https://doi.org/10.1016/j.epsl.2018.10.004

Similar data you may be interested in: