Circum-Antarctic age modelling of Quaternary marine cores under the Antarctic Circumpolar Current: ice-core dust-magnetic correlation
Sediments in the belt under the Antarctic Circumpolar Current (ACC) contain high quantities of siliceous microfossils (mainly diatoms) and very little to zero carbonate. This prevents establishment of the age by the usual methods of oxygen isotope stratigraphy at most coring sites. Downcore variatio...
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ftnerc:oai:nora.nerc.ac.uk:11182 2023-05-15T13:45:10+02:00 Circum-Antarctic age modelling of Quaternary marine cores under the Antarctic Circumpolar Current: ice-core dust-magnetic correlation Pugh, R.S. McCave, I.N. Hillenbrand, Claus-Dieter Kuhn, G. 2009 http://nora.nerc.ac.uk/id/eprint/11182/ https://doi.org/10.1016/j.epsl.2009.04.016 unknown Elsevier Pugh, R.S.; McCave, I.N.; Hillenbrand, Claus-Dieter orcid:0000-0003-0240-7317 Kuhn, G. 2009 Circum-Antarctic age modelling of Quaternary marine cores under the Antarctic Circumpolar Current: ice-core dust-magnetic correlation. Earth and Planetary Science Letters, 284 (1-2). 113-123. https://doi.org/10.1016/j.epsl.2009.04.016 <https://doi.org/10.1016/j.epsl.2009.04.016> Marine Sciences Glaciology Earth Sciences Publication - Article PeerReviewed 2009 ftnerc https://doi.org/10.1016/j.epsl.2009.04.016 2023-02-04T19:27:12Z Sediments in the belt under the Antarctic Circumpolar Current (ACC) contain high quantities of siliceous microfossils (mainly diatoms) and very little to zero carbonate. This prevents establishment of the age by the usual methods of oxygen isotope stratigraphy at most coring sites. Downcore variation in magnetic susceptibility (MS) from cores from the Scotia Sea closely resembles the temporal pattern of dust concentration and flux in East Antarctic ice cores. The validity of the temporal correlation between marine MS and EPICA Dome C (EDC) dust on the EDC3 time scale is established through C-14 dating of the acid insoluble organic matter back to 30 ka, and radiolarian abundance stratigraphy of Cycladophora davisiana back to 180 ka. The correlations are good (r>0.80) and give credence to the use of MS-dust as a means of establishing chronostratigraphy in carbonate-free pelagic sediments from the Southern Ocean. This correlation has been established in >10 cores in the Scotia Sea. The circum-Antarctic validity of the pattern is shown in correlations to MS in sediment cores from the Indian and SW Pacific sectors of the Southern Ocean. During MIS 3 (57-29 ka), when sedimentation rates at correlated core sites exceeded 10 cm ka(-1). three MS maxima in the marine sediments and dust peaks at EDC, respectively, correspond to the cool periods between Antarctic warm events A1-A4. We have not established the precise cause of the correlation. but its validity around the circum-Antarctic west wind belt suggests that the material was either all transported by wind or was supplemented by wind-driven current transport. The fact that it occurs also in sections with a low terrigenous content suggests a fine grained, high-susceptibility material such as magnetite as the likely source. (C) 2009 Elsevier B.V. All rights reserved. Article in Journal/Newspaper Antarc* Antarctic EPICA ice core Scotia Sea Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Indian Pacific Scotia Sea Southern Ocean The Antarctic Earth and Planetary Science Letters 284 1-2 113 123 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Marine Sciences Glaciology Earth Sciences |
spellingShingle |
Marine Sciences Glaciology Earth Sciences Pugh, R.S. McCave, I.N. Hillenbrand, Claus-Dieter Kuhn, G. Circum-Antarctic age modelling of Quaternary marine cores under the Antarctic Circumpolar Current: ice-core dust-magnetic correlation |
topic_facet |
Marine Sciences Glaciology Earth Sciences |
description |
Sediments in the belt under the Antarctic Circumpolar Current (ACC) contain high quantities of siliceous microfossils (mainly diatoms) and very little to zero carbonate. This prevents establishment of the age by the usual methods of oxygen isotope stratigraphy at most coring sites. Downcore variation in magnetic susceptibility (MS) from cores from the Scotia Sea closely resembles the temporal pattern of dust concentration and flux in East Antarctic ice cores. The validity of the temporal correlation between marine MS and EPICA Dome C (EDC) dust on the EDC3 time scale is established through C-14 dating of the acid insoluble organic matter back to 30 ka, and radiolarian abundance stratigraphy of Cycladophora davisiana back to 180 ka. The correlations are good (r>0.80) and give credence to the use of MS-dust as a means of establishing chronostratigraphy in carbonate-free pelagic sediments from the Southern Ocean. This correlation has been established in >10 cores in the Scotia Sea. The circum-Antarctic validity of the pattern is shown in correlations to MS in sediment cores from the Indian and SW Pacific sectors of the Southern Ocean. During MIS 3 (57-29 ka), when sedimentation rates at correlated core sites exceeded 10 cm ka(-1). three MS maxima in the marine sediments and dust peaks at EDC, respectively, correspond to the cool periods between Antarctic warm events A1-A4. We have not established the precise cause of the correlation. but its validity around the circum-Antarctic west wind belt suggests that the material was either all transported by wind or was supplemented by wind-driven current transport. The fact that it occurs also in sections with a low terrigenous content suggests a fine grained, high-susceptibility material such as magnetite as the likely source. (C) 2009 Elsevier B.V. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Pugh, R.S. McCave, I.N. Hillenbrand, Claus-Dieter Kuhn, G. |
author_facet |
Pugh, R.S. McCave, I.N. Hillenbrand, Claus-Dieter Kuhn, G. |
author_sort |
Pugh, R.S. |
title |
Circum-Antarctic age modelling of Quaternary marine cores under the Antarctic Circumpolar Current: ice-core dust-magnetic correlation |
title_short |
Circum-Antarctic age modelling of Quaternary marine cores under the Antarctic Circumpolar Current: ice-core dust-magnetic correlation |
title_full |
Circum-Antarctic age modelling of Quaternary marine cores under the Antarctic Circumpolar Current: ice-core dust-magnetic correlation |
title_fullStr |
Circum-Antarctic age modelling of Quaternary marine cores under the Antarctic Circumpolar Current: ice-core dust-magnetic correlation |
title_full_unstemmed |
Circum-Antarctic age modelling of Quaternary marine cores under the Antarctic Circumpolar Current: ice-core dust-magnetic correlation |
title_sort |
circum-antarctic age modelling of quaternary marine cores under the antarctic circumpolar current: ice-core dust-magnetic correlation |
publisher |
Elsevier |
publishDate |
2009 |
url |
http://nora.nerc.ac.uk/id/eprint/11182/ https://doi.org/10.1016/j.epsl.2009.04.016 |
geographic |
Antarctic Indian Pacific Scotia Sea Southern Ocean The Antarctic |
geographic_facet |
Antarctic Indian Pacific Scotia Sea Southern Ocean The Antarctic |
genre |
Antarc* Antarctic EPICA ice core Scotia Sea Southern Ocean |
genre_facet |
Antarc* Antarctic EPICA ice core Scotia Sea Southern Ocean |
op_relation |
Pugh, R.S.; McCave, I.N.; Hillenbrand, Claus-Dieter orcid:0000-0003-0240-7317 Kuhn, G. 2009 Circum-Antarctic age modelling of Quaternary marine cores under the Antarctic Circumpolar Current: ice-core dust-magnetic correlation. Earth and Planetary Science Letters, 284 (1-2). 113-123. https://doi.org/10.1016/j.epsl.2009.04.016 <https://doi.org/10.1016/j.epsl.2009.04.016> |
op_doi |
https://doi.org/10.1016/j.epsl.2009.04.016 |
container_title |
Earth and Planetary Science Letters |
container_volume |
284 |
container_issue |
1-2 |
container_start_page |
113 |
op_container_end_page |
123 |
_version_ |
1766214426546929664 |