Depositional patterns at Drift 7, Antarctic Peninsula: along-slope versus down-slope sediment transport as indicators for oceanic currents and climatic conditions
Understanding the processes and phases of deep-sea sediment drift formation is essential for a reconstruction of their evolution. This leads to a better understanding of the properties of oceanographic currents active during drift formation and in turn to information on the climatic conditions. A sy...
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Online Access: | https://epic.awi.de/id/eprint/15476/ https://epic.awi.de/id/eprint/15476/1/Uen2006d.pdf https://doi.org/10.1016/j.margeo.2006.08.008 https://hdl.handle.net/10013/epic.25613 https://hdl.handle.net/10013/epic.25613.d001 |
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ftawi:oai:epic.awi.de:15476 2024-09-15T17:41:58+00:00 Depositional patterns at Drift 7, Antarctic Peninsula: along-slope versus down-slope sediment transport as indicators for oceanic currents and climatic conditions Uenzelmann-Neben, Gabriele 2006 application/pdf https://epic.awi.de/id/eprint/15476/ https://epic.awi.de/id/eprint/15476/1/Uen2006d.pdf https://doi.org/10.1016/j.margeo.2006.08.008 https://hdl.handle.net/10013/epic.25613 https://hdl.handle.net/10013/epic.25613.d001 unknown https://epic.awi.de/id/eprint/15476/1/Uen2006d.pdf https://hdl.handle.net/10013/epic.25613.d001 Uenzelmann-Neben, G. orcid:0000-0002-0115-5923 (2006) Depositional patterns at Drift 7, Antarctic Peninsula: along-slope versus down-slope sediment transport as indicators for oceanic currents and climatic conditions , Marine geology, 233 (1), pp. 49-62 . doi:10.1016/j.margeo.2006.08.008 <https://doi.org/10.1016/j.margeo.2006.08.008> , hdl:10013/epic.25613 EPIC3Marine geology, 233(1), pp. 49-62 Article isiRev 2006 ftawi https://doi.org/10.1016/j.margeo.2006.08.008 2024-06-24T03:59:21Z Understanding the processes and phases of deep-sea sediment drift formation is essential for a reconstruction of their evolution. This leads to a better understanding of the properties of oceanographic currents active during drift formation and in turn to information on the climatic conditions. A system of sediment drifts at the Antarctic Peninsula Pacific rise has been chosen to learn more about the Neogene evolution of both current systems and palaeo-climate in that area. Drift 7 was extensively surveyed (seismic and sampling), and two ODP Leg 178 sites were drilled there. Using this information maps of reflectors depth and seismic unit thickness were compiled and interpreted regarding the controlling depositional processes. The depositional model shows an initially major along-slope sediment transport by a SW-setting bottom current (25-15 Ma), which deflected sediment supplied from the continental shelf. Between 15 Ma and 9.5 Ma down-slope transport took over as a result of the growth of the Antarctic Peninsula ice sheet. The SW setting bottom current appears to have broken down. Down-slope transport has decreased since 9.5 Ma, but a re-onset of the bottom current can only be observed since 5.3 Ma. The analysis has further shown that the nucleus of the drift is connected to a basement ridge. It is hence infered that basement topography played a major role in the formation of this sediment drift. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ice Sheet Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Marine Geology 233 1-4 49 62 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Understanding the processes and phases of deep-sea sediment drift formation is essential for a reconstruction of their evolution. This leads to a better understanding of the properties of oceanographic currents active during drift formation and in turn to information on the climatic conditions. A system of sediment drifts at the Antarctic Peninsula Pacific rise has been chosen to learn more about the Neogene evolution of both current systems and palaeo-climate in that area. Drift 7 was extensively surveyed (seismic and sampling), and two ODP Leg 178 sites were drilled there. Using this information maps of reflectors depth and seismic unit thickness were compiled and interpreted regarding the controlling depositional processes. The depositional model shows an initially major along-slope sediment transport by a SW-setting bottom current (25-15 Ma), which deflected sediment supplied from the continental shelf. Between 15 Ma and 9.5 Ma down-slope transport took over as a result of the growth of the Antarctic Peninsula ice sheet. The SW setting bottom current appears to have broken down. Down-slope transport has decreased since 9.5 Ma, but a re-onset of the bottom current can only be observed since 5.3 Ma. The analysis has further shown that the nucleus of the drift is connected to a basement ridge. It is hence infered that basement topography played a major role in the formation of this sediment drift. |
format |
Article in Journal/Newspaper |
author |
Uenzelmann-Neben, Gabriele |
spellingShingle |
Uenzelmann-Neben, Gabriele Depositional patterns at Drift 7, Antarctic Peninsula: along-slope versus down-slope sediment transport as indicators for oceanic currents and climatic conditions |
author_facet |
Uenzelmann-Neben, Gabriele |
author_sort |
Uenzelmann-Neben, Gabriele |
title |
Depositional patterns at Drift 7, Antarctic Peninsula: along-slope versus down-slope sediment transport as indicators for oceanic currents and climatic conditions |
title_short |
Depositional patterns at Drift 7, Antarctic Peninsula: along-slope versus down-slope sediment transport as indicators for oceanic currents and climatic conditions |
title_full |
Depositional patterns at Drift 7, Antarctic Peninsula: along-slope versus down-slope sediment transport as indicators for oceanic currents and climatic conditions |
title_fullStr |
Depositional patterns at Drift 7, Antarctic Peninsula: along-slope versus down-slope sediment transport as indicators for oceanic currents and climatic conditions |
title_full_unstemmed |
Depositional patterns at Drift 7, Antarctic Peninsula: along-slope versus down-slope sediment transport as indicators for oceanic currents and climatic conditions |
title_sort |
depositional patterns at drift 7, antarctic peninsula: along-slope versus down-slope sediment transport as indicators for oceanic currents and climatic conditions |
publishDate |
2006 |
url |
https://epic.awi.de/id/eprint/15476/ https://epic.awi.de/id/eprint/15476/1/Uen2006d.pdf https://doi.org/10.1016/j.margeo.2006.08.008 https://hdl.handle.net/10013/epic.25613 https://hdl.handle.net/10013/epic.25613.d001 |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Sheet |
op_source |
EPIC3Marine geology, 233(1), pp. 49-62 |
op_relation |
https://epic.awi.de/id/eprint/15476/1/Uen2006d.pdf https://hdl.handle.net/10013/epic.25613.d001 Uenzelmann-Neben, G. orcid:0000-0002-0115-5923 (2006) Depositional patterns at Drift 7, Antarctic Peninsula: along-slope versus down-slope sediment transport as indicators for oceanic currents and climatic conditions , Marine geology, 233 (1), pp. 49-62 . doi:10.1016/j.margeo.2006.08.008 <https://doi.org/10.1016/j.margeo.2006.08.008> , hdl:10013/epic.25613 |
op_doi |
https://doi.org/10.1016/j.margeo.2006.08.008 |
container_title |
Marine Geology |
container_volume |
233 |
container_issue |
1-4 |
container_start_page |
49 |
op_container_end_page |
62 |
_version_ |
1810488285706846208 |