Refinement of Miocene sea level and monsoon events from the sedimentary archive of the Maldives (Indian Ocean)
International Ocean Discovery Program (IODP) Expedition 359 cored sediments from eight borehole locations in the carbonate platform of the Maldives in the Indian Ocean. The expedition set out to unravel the timing of Neogene climate changes, in particular the evolution of the South Asian monsoon and...
Published in: | Progress in Earth and Planetary Science |
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Online Access: | http://hdl.handle.net/10400.1/11516 https://doi.org/10.1186/s40645-018-0165-x |
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ftunivalgarve:oai:sapientia.ualg.pt:10400.1/11516 2023-05-15T14:03:08+02:00 Refinement of Miocene sea level and monsoon events from the sedimentary archive of the Maldives (Indian Ocean) Betzler, C. Eberli, G. P. Luedmann, T. Reolid, J. Kroon, D. Reijmer, J. J. G. Swart, P. K. Wright, J. Young, J. R. Alvarez-Zarikian, C. Alonso-Garcia, Montserrat Bialik, O. M. Blattler, C. L. Guo, J. A. Haffen, S. Horozal, Senay Inoue, Mayuri Jovane, L. Lanci, L. Laya, J. C. Mee, A. L. Hui Nakakuni, M. Nath, B. N. Niino, K. Petruny, L. M. Pratiwi, S. D. Slagle, A. L. Sloss, C. R. Su, X. Yao, Z. 2018 http://hdl.handle.net/10400.1/11516 https://doi.org/10.1186/s40645-018-0165-x eng eng Springer 2197-4284 http://hdl.handle.net/10400.1/11516 doi:10.1186/s40645-018-0165-x openAccess http://creativecommons.org/licenses/by/4.0/ CC-BY Carbonate-platform Asian monsoon Middle Miocene Ice volume Evolution System Architecture Circulation Currents Neogene article 2018 ftunivalgarve https://doi.org/10.1186/s40645-018-0165-x 2022-05-30T08:48:19Z International Ocean Discovery Program (IODP) Expedition 359 cored sediments from eight borehole locations in the carbonate platform of the Maldives in the Indian Ocean. The expedition set out to unravel the timing of Neogene climate changes, in particular the evolution of the South Asian monsoon and fluctuations of the sea level. The timing of these changes are assessed by dating resultant sedimentary alterations that mark stratigraphic turning points in the Neogene Maldives platform system. The first four turning points during the early and middle Miocene are related to sea-level changes. These are reliably recorded in the stratigraphy of the carbonate sequences in which sequence boundaries provide the ages of the sea-level lowstand. Phases of aggradational platform growth give precise age brackets of long-term sea-level high stands during the early Miocene and the early to middle Miocene Climate Optimum that is dated here between 17 to 15.1 Ma. The subsequent middle Miocene cooling coincident with the eastern Antarctic ice sheet expansion resulted in a long-term lowering of sea level that is reflected by a progradational platform growth. The change in platform architecture from aggradation to progradation marks this turning point at 15.1 Ma.& para;& para;An abrupt change in sedimentation pattern is recognized across the entire archipelago at a sequence boundary dated as 12.9-13 Ma. At this turning point, the platform sedimentation switched to a current-controlled mode when the monsoon-wind-driven circulation started in the Indian Ocean. The similar age of the onset of drift deposition from monsoon-wind-driven circulation across the entire archipelago indicates an abrupt onset of monsoon winds in the Indian Ocean. Ten unconformities dissect the drift sequences, attesting changes in current strength or direction that are likely caused by the combined product of changes in the monsoon-wind intensity and sea level fluctuations in the last 13 Ma. A major shift in the drift packages is dated with 3.8 Ma that ... Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Universidade do Algarve: Sapienta Antarctic Indian Progress in Earth and Planetary Science 5 1 |
institution |
Open Polar |
collection |
Universidade do Algarve: Sapienta |
op_collection_id |
ftunivalgarve |
language |
English |
topic |
Carbonate-platform Asian monsoon Middle Miocene Ice volume Evolution System Architecture Circulation Currents Neogene |
spellingShingle |
Carbonate-platform Asian monsoon Middle Miocene Ice volume Evolution System Architecture Circulation Currents Neogene Betzler, C. Eberli, G. P. Luedmann, T. Reolid, J. Kroon, D. Reijmer, J. J. G. Swart, P. K. Wright, J. Young, J. R. Alvarez-Zarikian, C. Alonso-Garcia, Montserrat Bialik, O. M. Blattler, C. L. Guo, J. A. Haffen, S. Horozal, Senay Inoue, Mayuri Jovane, L. Lanci, L. Laya, J. C. Mee, A. L. Hui Nakakuni, M. Nath, B. N. Niino, K. Petruny, L. M. Pratiwi, S. D. Slagle, A. L. Sloss, C. R. Su, X. Yao, Z. Refinement of Miocene sea level and monsoon events from the sedimentary archive of the Maldives (Indian Ocean) |
topic_facet |
Carbonate-platform Asian monsoon Middle Miocene Ice volume Evolution System Architecture Circulation Currents Neogene |
description |
International Ocean Discovery Program (IODP) Expedition 359 cored sediments from eight borehole locations in the carbonate platform of the Maldives in the Indian Ocean. The expedition set out to unravel the timing of Neogene climate changes, in particular the evolution of the South Asian monsoon and fluctuations of the sea level. The timing of these changes are assessed by dating resultant sedimentary alterations that mark stratigraphic turning points in the Neogene Maldives platform system. The first four turning points during the early and middle Miocene are related to sea-level changes. These are reliably recorded in the stratigraphy of the carbonate sequences in which sequence boundaries provide the ages of the sea-level lowstand. Phases of aggradational platform growth give precise age brackets of long-term sea-level high stands during the early Miocene and the early to middle Miocene Climate Optimum that is dated here between 17 to 15.1 Ma. The subsequent middle Miocene cooling coincident with the eastern Antarctic ice sheet expansion resulted in a long-term lowering of sea level that is reflected by a progradational platform growth. The change in platform architecture from aggradation to progradation marks this turning point at 15.1 Ma.& para;& para;An abrupt change in sedimentation pattern is recognized across the entire archipelago at a sequence boundary dated as 12.9-13 Ma. At this turning point, the platform sedimentation switched to a current-controlled mode when the monsoon-wind-driven circulation started in the Indian Ocean. The similar age of the onset of drift deposition from monsoon-wind-driven circulation across the entire archipelago indicates an abrupt onset of monsoon winds in the Indian Ocean. Ten unconformities dissect the drift sequences, attesting changes in current strength or direction that are likely caused by the combined product of changes in the monsoon-wind intensity and sea level fluctuations in the last 13 Ma. A major shift in the drift packages is dated with 3.8 Ma that ... |
format |
Article in Journal/Newspaper |
author |
Betzler, C. Eberli, G. P. Luedmann, T. Reolid, J. Kroon, D. Reijmer, J. J. G. Swart, P. K. Wright, J. Young, J. R. Alvarez-Zarikian, C. Alonso-Garcia, Montserrat Bialik, O. M. Blattler, C. L. Guo, J. A. Haffen, S. Horozal, Senay Inoue, Mayuri Jovane, L. Lanci, L. Laya, J. C. Mee, A. L. Hui Nakakuni, M. Nath, B. N. Niino, K. Petruny, L. M. Pratiwi, S. D. Slagle, A. L. Sloss, C. R. Su, X. Yao, Z. |
author_facet |
Betzler, C. Eberli, G. P. Luedmann, T. Reolid, J. Kroon, D. Reijmer, J. J. G. Swart, P. K. Wright, J. Young, J. R. Alvarez-Zarikian, C. Alonso-Garcia, Montserrat Bialik, O. M. Blattler, C. L. Guo, J. A. Haffen, S. Horozal, Senay Inoue, Mayuri Jovane, L. Lanci, L. Laya, J. C. Mee, A. L. Hui Nakakuni, M. Nath, B. N. Niino, K. Petruny, L. M. Pratiwi, S. D. Slagle, A. L. Sloss, C. R. Su, X. Yao, Z. |
author_sort |
Betzler, C. |
title |
Refinement of Miocene sea level and monsoon events from the sedimentary archive of the Maldives (Indian Ocean) |
title_short |
Refinement of Miocene sea level and monsoon events from the sedimentary archive of the Maldives (Indian Ocean) |
title_full |
Refinement of Miocene sea level and monsoon events from the sedimentary archive of the Maldives (Indian Ocean) |
title_fullStr |
Refinement of Miocene sea level and monsoon events from the sedimentary archive of the Maldives (Indian Ocean) |
title_full_unstemmed |
Refinement of Miocene sea level and monsoon events from the sedimentary archive of the Maldives (Indian Ocean) |
title_sort |
refinement of miocene sea level and monsoon events from the sedimentary archive of the maldives (indian ocean) |
publisher |
Springer |
publishDate |
2018 |
url |
http://hdl.handle.net/10400.1/11516 https://doi.org/10.1186/s40645-018-0165-x |
geographic |
Antarctic Indian |
geographic_facet |
Antarctic Indian |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_relation |
2197-4284 http://hdl.handle.net/10400.1/11516 doi:10.1186/s40645-018-0165-x |
op_rights |
openAccess http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1186/s40645-018-0165-x |
container_title |
Progress in Earth and Planetary Science |
container_volume |
5 |
container_issue |
1 |
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1766273689574178816 |