Recent deep-water sedimentation, trace metal and radioisotope geochemistry across the Southern Ocean and northern Weddell Sea, antarctica
A wide variety of deep-water depositional environments were examined across 12 sampling stations in the Southern Ocean and northern Weddell Sea, Antarctica in order to provide a depositional context for the benthic biodiversity studies of ANDEEP (Antarctic Benthic Deep-Sea Biodiversity: colonisation...
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ftuhipublicatio:oai:pure.atira.dk:publications/2ab02027-0e6d-45e2-885a-4ae0cb0f9c51 2024-02-04T09:53:42+01:00 Recent deep-water sedimentation, trace metal and radioisotope geochemistry across the Southern Ocean and northern Weddell Sea, antarctica Howe, John Wilson, Charles R Shimmield, Tracy Diaz, Robert carpenter, lawrence 2007 https://pure.uhi.ac.uk/en/publications/2ab02027-0e6d-45e2-885a-4ae0cb0f9c51 eng eng info:eu-repo/semantics/restrictedAccess Howe , J , Wilson , C R , Shimmield , T , Diaz , R & carpenter , L 2007 , ' Recent deep-water sedimentation, trace metal and radioisotope geochemistry across the Southern Ocean and northern Weddell Sea, antarctica ' , DEEP-SEA RES PT II , no. 4 , pp. 1652-1681 . PENINSULA CIRCUMPOLAR CURRENT SURFACE SEDIMENTS WESTERN BRANSFIELD STRAIT DRAKE PASSAGE BELLINGSHAUSEN SEA POWELL BASIN Oceanography RECORD CONTINENTAL RISE WEST SCOTIA SEA article 2007 ftuhipublicatio 2024-01-11T23:20:53Z A wide variety of deep-water depositional environments were examined across 12 sampling stations in the Southern Ocean and northern Weddell Sea, Antarctica in order to provide a depositional context for the benthic biodiversity studies of ANDEEP (Antarctic Benthic Deep-Sea Biodiversity: colonisation history and recent community patterns). Here we present a diverse dataset comprising sub-bottom profiles, seabed photographs, sediment profile images, and box and multicore samples in order to investigate the recent depositional environments across the region. The sediments were investigated using texture, structure, trace metal (Mn, Fe, U, Mo, Ba, and Pb), stable (Pb-206/Pb-207) and radionuclide (excess Pb-210) isotopes. The sediments of the Agulhas Basin are interpreted as siliceous pelagites, the product of enhanced surface productivity. The eastern Weddell continental rise is characterised by diverse depositional environments with hemipelagic, turbiditic and contouritic sedimentation. In contrast, the northern Weddell Abyssal Plain is dominated by hemipelagites with fine-grained turbidites. A single sampling station from the central Powell Basin contained hemipelagites and a fine-grained turbidite. A core from the central Bransfield Strait recovered hemipelagites with a silt turbidite. The seabed photographs display a seabed dominated by biogenic mud balls formed by cirratulid polychaetes. Trace metal, Pb-isotope, and excess Pb-210 data all reveal the central Bransfield Strait to be a region of enhanced productivity with a mass accumulation rate of 0.073g/cm(2). Two stations in the Bellingshausen Sea recovered hemipelagites and turbidites. Mn, Fe and Mo data suggest a degradation of organic matter in the sediments leading to redox cycling. (c) 2007 Elsevier Ltd. All rights reserved. Article in Journal/Newspaper Antarc* Antarctic Antarctica Bellingshausen Sea Bransfield Strait Drake Passage Scotia Sea Southern Ocean Weddell Sea University of the Highlands and Islands: Research Database of UHI Agulhas Basin ENVELOPE(27.000,27.000,-47.000,-47.000) Antarctic Bellingshausen Sea Bransfield Strait Drake Passage Powell Basin ENVELOPE(-49.500,-49.500,-62.250,-62.250) Scotia Sea Southern Ocean Weddell Weddell Abyssal Plain ENVELOPE(-20.000,-20.000,-65.000,-65.000) Weddell Sea |
institution |
Open Polar |
collection |
University of the Highlands and Islands: Research Database of UHI |
op_collection_id |
ftuhipublicatio |
language |
English |
topic |
PENINSULA CIRCUMPOLAR CURRENT SURFACE SEDIMENTS WESTERN BRANSFIELD STRAIT DRAKE PASSAGE BELLINGSHAUSEN SEA POWELL BASIN Oceanography RECORD CONTINENTAL RISE WEST SCOTIA SEA |
spellingShingle |
PENINSULA CIRCUMPOLAR CURRENT SURFACE SEDIMENTS WESTERN BRANSFIELD STRAIT DRAKE PASSAGE BELLINGSHAUSEN SEA POWELL BASIN Oceanography RECORD CONTINENTAL RISE WEST SCOTIA SEA Howe, John Wilson, Charles R Shimmield, Tracy Diaz, Robert carpenter, lawrence Recent deep-water sedimentation, trace metal and radioisotope geochemistry across the Southern Ocean and northern Weddell Sea, antarctica |
topic_facet |
PENINSULA CIRCUMPOLAR CURRENT SURFACE SEDIMENTS WESTERN BRANSFIELD STRAIT DRAKE PASSAGE BELLINGSHAUSEN SEA POWELL BASIN Oceanography RECORD CONTINENTAL RISE WEST SCOTIA SEA |
description |
A wide variety of deep-water depositional environments were examined across 12 sampling stations in the Southern Ocean and northern Weddell Sea, Antarctica in order to provide a depositional context for the benthic biodiversity studies of ANDEEP (Antarctic Benthic Deep-Sea Biodiversity: colonisation history and recent community patterns). Here we present a diverse dataset comprising sub-bottom profiles, seabed photographs, sediment profile images, and box and multicore samples in order to investigate the recent depositional environments across the region. The sediments were investigated using texture, structure, trace metal (Mn, Fe, U, Mo, Ba, and Pb), stable (Pb-206/Pb-207) and radionuclide (excess Pb-210) isotopes. The sediments of the Agulhas Basin are interpreted as siliceous pelagites, the product of enhanced surface productivity. The eastern Weddell continental rise is characterised by diverse depositional environments with hemipelagic, turbiditic and contouritic sedimentation. In contrast, the northern Weddell Abyssal Plain is dominated by hemipelagites with fine-grained turbidites. A single sampling station from the central Powell Basin contained hemipelagites and a fine-grained turbidite. A core from the central Bransfield Strait recovered hemipelagites with a silt turbidite. The seabed photographs display a seabed dominated by biogenic mud balls formed by cirratulid polychaetes. Trace metal, Pb-isotope, and excess Pb-210 data all reveal the central Bransfield Strait to be a region of enhanced productivity with a mass accumulation rate of 0.073g/cm(2). Two stations in the Bellingshausen Sea recovered hemipelagites and turbidites. Mn, Fe and Mo data suggest a degradation of organic matter in the sediments leading to redox cycling. (c) 2007 Elsevier Ltd. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Howe, John Wilson, Charles R Shimmield, Tracy Diaz, Robert carpenter, lawrence |
author_facet |
Howe, John Wilson, Charles R Shimmield, Tracy Diaz, Robert carpenter, lawrence |
author_sort |
Howe, John |
title |
Recent deep-water sedimentation, trace metal and radioisotope geochemistry across the Southern Ocean and northern Weddell Sea, antarctica |
title_short |
Recent deep-water sedimentation, trace metal and radioisotope geochemistry across the Southern Ocean and northern Weddell Sea, antarctica |
title_full |
Recent deep-water sedimentation, trace metal and radioisotope geochemistry across the Southern Ocean and northern Weddell Sea, antarctica |
title_fullStr |
Recent deep-water sedimentation, trace metal and radioisotope geochemistry across the Southern Ocean and northern Weddell Sea, antarctica |
title_full_unstemmed |
Recent deep-water sedimentation, trace metal and radioisotope geochemistry across the Southern Ocean and northern Weddell Sea, antarctica |
title_sort |
recent deep-water sedimentation, trace metal and radioisotope geochemistry across the southern ocean and northern weddell sea, antarctica |
publishDate |
2007 |
url |
https://pure.uhi.ac.uk/en/publications/2ab02027-0e6d-45e2-885a-4ae0cb0f9c51 |
long_lat |
ENVELOPE(27.000,27.000,-47.000,-47.000) ENVELOPE(-49.500,-49.500,-62.250,-62.250) ENVELOPE(-20.000,-20.000,-65.000,-65.000) |
geographic |
Agulhas Basin Antarctic Bellingshausen Sea Bransfield Strait Drake Passage Powell Basin Scotia Sea Southern Ocean Weddell Weddell Abyssal Plain Weddell Sea |
geographic_facet |
Agulhas Basin Antarctic Bellingshausen Sea Bransfield Strait Drake Passage Powell Basin Scotia Sea Southern Ocean Weddell Weddell Abyssal Plain Weddell Sea |
genre |
Antarc* Antarctic Antarctica Bellingshausen Sea Bransfield Strait Drake Passage Scotia Sea Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Bellingshausen Sea Bransfield Strait Drake Passage Scotia Sea Southern Ocean Weddell Sea |
op_source |
Howe , J , Wilson , C R , Shimmield , T , Diaz , R & carpenter , L 2007 , ' Recent deep-water sedimentation, trace metal and radioisotope geochemistry across the Southern Ocean and northern Weddell Sea, antarctica ' , DEEP-SEA RES PT II , no. 4 , pp. 1652-1681 . |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1789967667911720960 |