Sea-Level Changes and δ18O Record for the Past 34,000 yr from Mayotte Reef, Indian Ocean
New sea-level and δ18O curves for the past 34,000 yr, based on uranium–thorium chronology, are proposed for the southwestern part of the Indian Ocean. The archives include cores drilled from onshore coral reefs and submersed samples from foreslope corals of Mayotte in the Comoro Islands. The Mayotte...
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Online Access: | https://oceanrep.geomar.de/id/eprint/5115/ https://oceanrep.geomar.de/id/eprint/5115/1/Colonna.pdf https://doi.org/10.1006/qres.1996.0071 |
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ftoceanrep:oai:oceanrep.geomar.de:5115 2023-05-15T17:32:48+02:00 Sea-Level Changes and δ18O Record for the Past 34,000 yr from Mayotte Reef, Indian Ocean Colonna, M. Casanova, J. Dullo, Wolf-Christian Camoin, G. 1996 text https://oceanrep.geomar.de/id/eprint/5115/ https://oceanrep.geomar.de/id/eprint/5115/1/Colonna.pdf https://doi.org/10.1006/qres.1996.0071 en eng Elsevier https://oceanrep.geomar.de/id/eprint/5115/1/Colonna.pdf Colonna, M., Casanova, J., Dullo, W. C. and Camoin, G. (1996) Sea-Level Changes and δ18O Record for the Past 34,000 yr from Mayotte Reef, Indian Ocean. Quaternary Research, 46 (3). pp. 335-339. DOI 10.1006/qres.1996.0071 <https://doi.org/10.1006/qres.1996.0071>. doi:10.1006/qres.1996.0071 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 1996 ftoceanrep https://doi.org/10.1006/qres.1996.0071 2023-04-07T14:50:36Z New sea-level and δ18O curves for the past 34,000 yr, based on uranium–thorium chronology, are proposed for the southwestern part of the Indian Ocean. The archives include cores drilled from onshore coral reefs and submersed samples from foreslope corals of Mayotte in the Comoro Islands. The Mayotte sea-level curve shows a lowstand of 145 ± 5 m below the present level during the last glacial maximum dated at 18,400 yr. This lowstand is supported by the maximum18O enrichment in the coral colonies. The residual signal (Δδ18O), controlled by sea-surface temperature changes, indicates that surface waters 18,400 yr ago were approximately 5°C cooler than present. The deglacial sea-level rise is clearly recorded, with a mean rate of about 1.7 cm yr−1between 18,400 and 10,000 yr ago. The deglaciation phase is characterized by a strong18O depletion marked by two pulses related to meltwater discharges into the North Atlantic Ocean but also characterized by responses specific to the tropical Indian Ocean. Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Indian Quaternary Research 46 3 335 339 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
New sea-level and δ18O curves for the past 34,000 yr, based on uranium–thorium chronology, are proposed for the southwestern part of the Indian Ocean. The archives include cores drilled from onshore coral reefs and submersed samples from foreslope corals of Mayotte in the Comoro Islands. The Mayotte sea-level curve shows a lowstand of 145 ± 5 m below the present level during the last glacial maximum dated at 18,400 yr. This lowstand is supported by the maximum18O enrichment in the coral colonies. The residual signal (Δδ18O), controlled by sea-surface temperature changes, indicates that surface waters 18,400 yr ago were approximately 5°C cooler than present. The deglacial sea-level rise is clearly recorded, with a mean rate of about 1.7 cm yr−1between 18,400 and 10,000 yr ago. The deglaciation phase is characterized by a strong18O depletion marked by two pulses related to meltwater discharges into the North Atlantic Ocean but also characterized by responses specific to the tropical Indian Ocean. |
format |
Article in Journal/Newspaper |
author |
Colonna, M. Casanova, J. Dullo, Wolf-Christian Camoin, G. |
spellingShingle |
Colonna, M. Casanova, J. Dullo, Wolf-Christian Camoin, G. Sea-Level Changes and δ18O Record for the Past 34,000 yr from Mayotte Reef, Indian Ocean |
author_facet |
Colonna, M. Casanova, J. Dullo, Wolf-Christian Camoin, G. |
author_sort |
Colonna, M. |
title |
Sea-Level Changes and δ18O Record for the Past 34,000 yr from Mayotte Reef, Indian Ocean |
title_short |
Sea-Level Changes and δ18O Record for the Past 34,000 yr from Mayotte Reef, Indian Ocean |
title_full |
Sea-Level Changes and δ18O Record for the Past 34,000 yr from Mayotte Reef, Indian Ocean |
title_fullStr |
Sea-Level Changes and δ18O Record for the Past 34,000 yr from Mayotte Reef, Indian Ocean |
title_full_unstemmed |
Sea-Level Changes and δ18O Record for the Past 34,000 yr from Mayotte Reef, Indian Ocean |
title_sort |
sea-level changes and δ18o record for the past 34,000 yr from mayotte reef, indian ocean |
publisher |
Elsevier |
publishDate |
1996 |
url |
https://oceanrep.geomar.de/id/eprint/5115/ https://oceanrep.geomar.de/id/eprint/5115/1/Colonna.pdf https://doi.org/10.1006/qres.1996.0071 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/5115/1/Colonna.pdf Colonna, M., Casanova, J., Dullo, W. C. and Camoin, G. (1996) Sea-Level Changes and δ18O Record for the Past 34,000 yr from Mayotte Reef, Indian Ocean. Quaternary Research, 46 (3). pp. 335-339. DOI 10.1006/qres.1996.0071 <https://doi.org/10.1006/qres.1996.0071>. doi:10.1006/qres.1996.0071 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1006/qres.1996.0071 |
container_title |
Quaternary Research |
container_volume |
46 |
container_issue |
3 |
container_start_page |
335 |
op_container_end_page |
339 |
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1766131083046289408 |