Two-step closure of the Miocene Indian Ocean Gateway to the Mediterranean
The Tethys Ocean was compartmentalized into the Mediterranean Sea and Indian Ocean during the early Miocene, yet the exact nature and timing of this disconnection are not well understood. Here we present two new neodymium isotope records from isolated carbonate platforms on both sides of the closing...
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ftpubmed:oai:pubmedcentral.nih.gov:6586870 2023-05-15T13:35:03+02:00 Two-step closure of the Miocene Indian Ocean Gateway to the Mediterranean Bialik, Or M. Frank, Martin Betzler, Christian Zammit, Ray Waldmann, Nicolas D. 2019-06-20 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6586870/ http://www.ncbi.nlm.nih.gov/pubmed/31222018 https://doi.org/10.1038/s41598-019-45308-7 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6586870/ http://www.ncbi.nlm.nih.gov/pubmed/31222018 http://dx.doi.org/10.1038/s41598-019-45308-7 © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. CC-BY Article Text 2019 ftpubmed https://doi.org/10.1038/s41598-019-45308-7 2019-06-30T01:07:01Z The Tethys Ocean was compartmentalized into the Mediterranean Sea and Indian Ocean during the early Miocene, yet the exact nature and timing of this disconnection are not well understood. Here we present two new neodymium isotope records from isolated carbonate platforms on both sides of the closing seaway, Malta (outcrop sampling) and the Maldives (IODP Site U1468), to constrain the evolution of past water mass exchange between the present day Mediterranean Sea and Indian Ocean via the Mesopotamian Seaway. Combining these data with box modeling results indicates that water mass exchange was reduced by ~90% in a first step at ca. 20 Ma. The terminal closure of the seaway then coincided with the sea level drop caused by the onset of permanent glaciation of Antarctica at ca. 13.8 Ma. The termination of meridional water mass exchange through the Tethyan Seaway resulted in a global reorganization of currents, paved the way to the development of upwelling in the Arabian Sea and possibly led to a strengthening of South Asian Monsoon. Text Antarc* Antarctica PubMed Central (PMC) Indian Scientific Reports 9 1 |
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Article Bialik, Or M. Frank, Martin Betzler, Christian Zammit, Ray Waldmann, Nicolas D. Two-step closure of the Miocene Indian Ocean Gateway to the Mediterranean |
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Article |
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The Tethys Ocean was compartmentalized into the Mediterranean Sea and Indian Ocean during the early Miocene, yet the exact nature and timing of this disconnection are not well understood. Here we present two new neodymium isotope records from isolated carbonate platforms on both sides of the closing seaway, Malta (outcrop sampling) and the Maldives (IODP Site U1468), to constrain the evolution of past water mass exchange between the present day Mediterranean Sea and Indian Ocean via the Mesopotamian Seaway. Combining these data with box modeling results indicates that water mass exchange was reduced by ~90% in a first step at ca. 20 Ma. The terminal closure of the seaway then coincided with the sea level drop caused by the onset of permanent glaciation of Antarctica at ca. 13.8 Ma. The termination of meridional water mass exchange through the Tethyan Seaway resulted in a global reorganization of currents, paved the way to the development of upwelling in the Arabian Sea and possibly led to a strengthening of South Asian Monsoon. |
format |
Text |
author |
Bialik, Or M. Frank, Martin Betzler, Christian Zammit, Ray Waldmann, Nicolas D. |
author_facet |
Bialik, Or M. Frank, Martin Betzler, Christian Zammit, Ray Waldmann, Nicolas D. |
author_sort |
Bialik, Or M. |
title |
Two-step closure of the Miocene Indian Ocean Gateway to the Mediterranean |
title_short |
Two-step closure of the Miocene Indian Ocean Gateway to the Mediterranean |
title_full |
Two-step closure of the Miocene Indian Ocean Gateway to the Mediterranean |
title_fullStr |
Two-step closure of the Miocene Indian Ocean Gateway to the Mediterranean |
title_full_unstemmed |
Two-step closure of the Miocene Indian Ocean Gateway to the Mediterranean |
title_sort |
two-step closure of the miocene indian ocean gateway to the mediterranean |
publisher |
Nature Publishing Group UK |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6586870/ http://www.ncbi.nlm.nih.gov/pubmed/31222018 https://doi.org/10.1038/s41598-019-45308-7 |
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Indian |
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Antarc* Antarctica |
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Antarc* Antarctica |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6586870/ http://www.ncbi.nlm.nih.gov/pubmed/31222018 http://dx.doi.org/10.1038/s41598-019-45308-7 |
op_rights |
© The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
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CC-BY |
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https://doi.org/10.1038/s41598-019-45308-7 |
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Scientific Reports |
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