10Be exposure age constraints on the Late Weichselian ice-sheet geometry and dynamics in inter-ice-stream areas, western Svalbard
The Late Weichselian ice sheet of western Svalbard was characterized by ice streams and inter-ice-stream areas. To reconstruct its geometry and dynamics we investigated the glacial geology of two areas on the island of Prins Karls Forland and the Mitrahalvøya peninsula. Cosmogenic 10Be surface expos...
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Online Access: | https://hal.in2p3.fr/in2p3-00779631 https://doi.org/10.1111/j.1502-3885.2012.00282.x |
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ftunivnantes:oai:HAL:in2p3-00779631v1 2023-05-15T16:17:28+02:00 10Be exposure age constraints on the Late Weichselian ice-sheet geometry and dynamics in inter-ice-stream areas, western Svalbard Landvik, J. Y. Brook, E. J. Gualtieri, L. Linge, H. Raisbeck, G. Salvigsen, O. Yiou, F. Norwegian University of Life Sciences (NMBU) CSNSM AS Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM) Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) 2013 https://hal.in2p3.fr/in2p3-00779631 https://doi.org/10.1111/j.1502-3885.2012.00282.x en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1502-3885.2012.00282.x in2p3-00779631 https://hal.in2p3.fr/in2p3-00779631 doi:10.1111/j.1502-3885.2012.00282.x ISSN: 0300-9483 Boreas https://hal.in2p3.fr/in2p3-00779631 Boreas, 2013, 42, pp.43-56. ⟨10.1111/j.1502-3885.2012.00282.x⟩ [PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] info:eu-repo/semantics/article Journal articles 2013 ftunivnantes https://doi.org/10.1111/j.1502-3885.2012.00282.x 2023-03-08T00:03:41Z The Late Weichselian ice sheet of western Svalbard was characterized by ice streams and inter-ice-stream areas. To reconstruct its geometry and dynamics we investigated the glacial geology of two areas on the island of Prins Karls Forland and the Mitrahalvøya peninsula. Cosmogenic 10Be surface exposure dating of glacial erratics and bedrock was used to constrain past ice thickness, providing minimum estimates in both areas. Contrary to previous studies, we found that Prins Karls Forland experienced a westward ice flux from Spitsbergen. Ice thickness reached >470 m a.s.l., and warm-based conditions occurred periodically. Local deglaciation took place between 16 and 13 ka. At Mitrahalvøya, glacier ice draining the Krossfjorden basin reached >300 m a.s.l., and local deglaciation occurred at c. 13 ka. We propose the following succession of events for the last deglaciation. After the maximum glacier extent, ice streams in the cross-shelf troughs and fjords retreated, tributary ice streams formed in Forlandsundet and Krossfjorden, and, finally, local ice caps were isolated over both Prins Karls Forland and Mitrahalvøya and their adjacent shelves. Article in Journal/Newspaper Forlandsundet glacier Ice Sheet Krossfjord* Prins Karls Forland Svalbard Spitsbergen Université de Nantes: HAL-UNIV-NANTES Forlandsundet ENVELOPE(11.984,11.984,78.510,78.510) Krossfjorden ENVELOPE(11.742,11.742,79.141,79.141) Mitrahalvøya ENVELOPE(11.333,11.333,79.233,79.233) Prins Karls Forland ENVELOPE(11.175,11.175,78.543,78.543) Svalbard Boreas 42 1 43 56 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] |
spellingShingle |
[PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] Landvik, J. Y. Brook, E. J. Gualtieri, L. Linge, H. Raisbeck, G. Salvigsen, O. Yiou, F. 10Be exposure age constraints on the Late Weichselian ice-sheet geometry and dynamics in inter-ice-stream areas, western Svalbard |
topic_facet |
[PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] |
description |
The Late Weichselian ice sheet of western Svalbard was characterized by ice streams and inter-ice-stream areas. To reconstruct its geometry and dynamics we investigated the glacial geology of two areas on the island of Prins Karls Forland and the Mitrahalvøya peninsula. Cosmogenic 10Be surface exposure dating of glacial erratics and bedrock was used to constrain past ice thickness, providing minimum estimates in both areas. Contrary to previous studies, we found that Prins Karls Forland experienced a westward ice flux from Spitsbergen. Ice thickness reached >470 m a.s.l., and warm-based conditions occurred periodically. Local deglaciation took place between 16 and 13 ka. At Mitrahalvøya, glacier ice draining the Krossfjorden basin reached >300 m a.s.l., and local deglaciation occurred at c. 13 ka. We propose the following succession of events for the last deglaciation. After the maximum glacier extent, ice streams in the cross-shelf troughs and fjords retreated, tributary ice streams formed in Forlandsundet and Krossfjorden, and, finally, local ice caps were isolated over both Prins Karls Forland and Mitrahalvøya and their adjacent shelves. |
author2 |
Norwegian University of Life Sciences (NMBU) CSNSM AS Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM) Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Landvik, J. Y. Brook, E. J. Gualtieri, L. Linge, H. Raisbeck, G. Salvigsen, O. Yiou, F. |
author_facet |
Landvik, J. Y. Brook, E. J. Gualtieri, L. Linge, H. Raisbeck, G. Salvigsen, O. Yiou, F. |
author_sort |
Landvik, J. Y. |
title |
10Be exposure age constraints on the Late Weichselian ice-sheet geometry and dynamics in inter-ice-stream areas, western Svalbard |
title_short |
10Be exposure age constraints on the Late Weichselian ice-sheet geometry and dynamics in inter-ice-stream areas, western Svalbard |
title_full |
10Be exposure age constraints on the Late Weichselian ice-sheet geometry and dynamics in inter-ice-stream areas, western Svalbard |
title_fullStr |
10Be exposure age constraints on the Late Weichselian ice-sheet geometry and dynamics in inter-ice-stream areas, western Svalbard |
title_full_unstemmed |
10Be exposure age constraints on the Late Weichselian ice-sheet geometry and dynamics in inter-ice-stream areas, western Svalbard |
title_sort |
10be exposure age constraints on the late weichselian ice-sheet geometry and dynamics in inter-ice-stream areas, western svalbard |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.in2p3.fr/in2p3-00779631 https://doi.org/10.1111/j.1502-3885.2012.00282.x |
long_lat |
ENVELOPE(11.984,11.984,78.510,78.510) ENVELOPE(11.742,11.742,79.141,79.141) ENVELOPE(11.333,11.333,79.233,79.233) ENVELOPE(11.175,11.175,78.543,78.543) |
geographic |
Forlandsundet Krossfjorden Mitrahalvøya Prins Karls Forland Svalbard |
geographic_facet |
Forlandsundet Krossfjorden Mitrahalvøya Prins Karls Forland Svalbard |
genre |
Forlandsundet glacier Ice Sheet Krossfjord* Prins Karls Forland Svalbard Spitsbergen |
genre_facet |
Forlandsundet glacier Ice Sheet Krossfjord* Prins Karls Forland Svalbard Spitsbergen |
op_source |
ISSN: 0300-9483 Boreas https://hal.in2p3.fr/in2p3-00779631 Boreas, 2013, 42, pp.43-56. ⟨10.1111/j.1502-3885.2012.00282.x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1502-3885.2012.00282.x in2p3-00779631 https://hal.in2p3.fr/in2p3-00779631 doi:10.1111/j.1502-3885.2012.00282.x |
op_doi |
https://doi.org/10.1111/j.1502-3885.2012.00282.x |
container_title |
Boreas |
container_volume |
42 |
container_issue |
1 |
container_start_page |
43 |
op_container_end_page |
56 |
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1766003325218586624 |