Paleoenvironmental reconstruction of Challenger Mound initiation in the Porcupine Seabight, NE Atlantic
The understanding of the paleoenvironment during initiation and early development of deep cold-water coral carbonate mounds in the NE Atlantic is currently a focus of international research. The Integrated Ocean Drilling Program (IODP) Expedition 307 drilled the 155 m high Challenger Mound in the Po...
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Online Access: | https://oceanrep.geomar.de/id/eprint/9990/ https://oceanrep.geomar.de/id/eprint/9990/2/Raddatz.pdf https://doi.org/10.1016/j.margeo.2010.10.019 |
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ftoceanrep:oai:oceanrep.geomar.de:9990 2024-04-21T07:52:32+00:00 Paleoenvironmental reconstruction of Challenger Mound initiation in the Porcupine Seabight, NE Atlantic Raddatz, Jacek Rüggeberg, Andres Margreth, Stephan Dullo, Wolf-Christian 2011 text https://oceanrep.geomar.de/id/eprint/9990/ https://oceanrep.geomar.de/id/eprint/9990/2/Raddatz.pdf https://doi.org/10.1016/j.margeo.2010.10.019 en eng Elsevier https://oceanrep.geomar.de/id/eprint/9990/2/Raddatz.pdf Raddatz, J., Rüggeberg, A., Margreth, S. and Dullo, W. C. and IODP Expediton 307 Scientific Party (2011) Paleoenvironmental reconstruction of Challenger Mound initiation in the Porcupine Seabight, NE Atlantic. Open Access Marine Geology, 282 . pp. 79-90. DOI 10.1016/j.margeo.2010.10.019 <https://doi.org/10.1016/j.margeo.2010.10.019>. doi:10.1016/j.margeo.2010.10.019 cc_by_3.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2011 ftoceanrep https://doi.org/10.1016/j.margeo.2010.10.019 2024-03-27T17:48:37Z The understanding of the paleoenvironment during initiation and early development of deep cold-water coral carbonate mounds in the NE Atlantic is currently a focus of international research. The Integrated Ocean Drilling Program (IODP) Expedition 307 drilled the 155 m high Challenger Mound in the Porcupine Seabight (SW off Ireland) in order to investigate for the first time sediments from the base of a giant carbonate mound. In this study we focus in high resolution on 12 m of sediments from Site 1317 encompassing the mound base. The mound initiation and start-up phase coincide with the intensification of the Northern Hemisphere Glaciation (INHG) at around 2.7 Ma. Further carbonate mound development seems to be strongly dependent on rapid changes in paleoceanographic and climatic conditions at the Pliocene–Pleistocene boundary, especially characterized and caused by the interaction of intermediate water masses, the Mediterranean Outflow Water (MOW), the Eastern North Atlantic Water (ENAW) and the influence of Southern Component Water (SCW). This study is based on well-established proxies such as δ18O and δ13C of planktonic (Globigerina bulloides) and benthic foraminifera (Fontbotia wuellerstorfi, Discanomalina coronata, Lobatula lobatula, Lobatula antarctica, and Planulina ariminensis) as well as grain size parameters to identify the paleoenvironmental and paleoecological setting favourable for the initial coral colonization on the mound. Stable oxygen and carbon isotope records of benthic foraminiferal species indicate that L. lobatula provides a reliable isotopic signature for paleoenvironmental reconstructions. In particular, δ18O values of L. lobatula indicate that initial mound growth started in a glacial mode with moderate excursions in δ18O values. Carbon isotope values of D. coronata are significantly offset compared to other epibenthic species. This offset may be related to vital effects. Bottom water temperatures, calculated using standard equations based on δ18O of foraminiferal tests, range between 7 ... Article in Journal/Newspaper Antarc* Antarctica North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Marine Geology 282 1-2 79 90 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The understanding of the paleoenvironment during initiation and early development of deep cold-water coral carbonate mounds in the NE Atlantic is currently a focus of international research. The Integrated Ocean Drilling Program (IODP) Expedition 307 drilled the 155 m high Challenger Mound in the Porcupine Seabight (SW off Ireland) in order to investigate for the first time sediments from the base of a giant carbonate mound. In this study we focus in high resolution on 12 m of sediments from Site 1317 encompassing the mound base. The mound initiation and start-up phase coincide with the intensification of the Northern Hemisphere Glaciation (INHG) at around 2.7 Ma. Further carbonate mound development seems to be strongly dependent on rapid changes in paleoceanographic and climatic conditions at the Pliocene–Pleistocene boundary, especially characterized and caused by the interaction of intermediate water masses, the Mediterranean Outflow Water (MOW), the Eastern North Atlantic Water (ENAW) and the influence of Southern Component Water (SCW). This study is based on well-established proxies such as δ18O and δ13C of planktonic (Globigerina bulloides) and benthic foraminifera (Fontbotia wuellerstorfi, Discanomalina coronata, Lobatula lobatula, Lobatula antarctica, and Planulina ariminensis) as well as grain size parameters to identify the paleoenvironmental and paleoecological setting favourable for the initial coral colonization on the mound. Stable oxygen and carbon isotope records of benthic foraminiferal species indicate that L. lobatula provides a reliable isotopic signature for paleoenvironmental reconstructions. In particular, δ18O values of L. lobatula indicate that initial mound growth started in a glacial mode with moderate excursions in δ18O values. Carbon isotope values of D. coronata are significantly offset compared to other epibenthic species. This offset may be related to vital effects. Bottom water temperatures, calculated using standard equations based on δ18O of foraminiferal tests, range between 7 ... |
format |
Article in Journal/Newspaper |
author |
Raddatz, Jacek Rüggeberg, Andres Margreth, Stephan Dullo, Wolf-Christian |
spellingShingle |
Raddatz, Jacek Rüggeberg, Andres Margreth, Stephan Dullo, Wolf-Christian Paleoenvironmental reconstruction of Challenger Mound initiation in the Porcupine Seabight, NE Atlantic |
author_facet |
Raddatz, Jacek Rüggeberg, Andres Margreth, Stephan Dullo, Wolf-Christian |
author_sort |
Raddatz, Jacek |
title |
Paleoenvironmental reconstruction of Challenger Mound initiation in the Porcupine Seabight, NE Atlantic |
title_short |
Paleoenvironmental reconstruction of Challenger Mound initiation in the Porcupine Seabight, NE Atlantic |
title_full |
Paleoenvironmental reconstruction of Challenger Mound initiation in the Porcupine Seabight, NE Atlantic |
title_fullStr |
Paleoenvironmental reconstruction of Challenger Mound initiation in the Porcupine Seabight, NE Atlantic |
title_full_unstemmed |
Paleoenvironmental reconstruction of Challenger Mound initiation in the Porcupine Seabight, NE Atlantic |
title_sort |
paleoenvironmental reconstruction of challenger mound initiation in the porcupine seabight, ne atlantic |
publisher |
Elsevier |
publishDate |
2011 |
url |
https://oceanrep.geomar.de/id/eprint/9990/ https://oceanrep.geomar.de/id/eprint/9990/2/Raddatz.pdf https://doi.org/10.1016/j.margeo.2010.10.019 |
genre |
Antarc* Antarctica North Atlantic |
genre_facet |
Antarc* Antarctica North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/9990/2/Raddatz.pdf Raddatz, J., Rüggeberg, A., Margreth, S. and Dullo, W. C. and IODP Expediton 307 Scientific Party (2011) Paleoenvironmental reconstruction of Challenger Mound initiation in the Porcupine Seabight, NE Atlantic. Open Access Marine Geology, 282 . pp. 79-90. DOI 10.1016/j.margeo.2010.10.019 <https://doi.org/10.1016/j.margeo.2010.10.019>. doi:10.1016/j.margeo.2010.10.019 |
op_rights |
cc_by_3.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.margeo.2010.10.019 |
container_title |
Marine Geology |
container_volume |
282 |
container_issue |
1-2 |
container_start_page |
79 |
op_container_end_page |
90 |
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1796935759571189760 |