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Volcanic evolution of an ultraslow-spreading ridge

Nearly 30% of ocean crust forms at mid-ocean ridges where the spreading rate is less than 20 mm per year. According to the seafloor spreading paradigm, oceanic crust forms along a narrow axial zone and is transported away from the rift valley. However, because quantitative age data of volcanic erupt...

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Autores principales: Stubseid, H. H., Bjerga, A., Haflidason, H., Pedersen, L. E. R., Pedersen, R. B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10338544/
https://www.ncbi.nlm.nih.gov/pubmed/37438364
http://dx.doi.org/10.1038/s41467-023-39925-0
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author Stubseid, H. H.
Bjerga, A.
Haflidason, H.
Pedersen, L. E. R.
Pedersen, R. B.
author_facet Stubseid, H. H.
Bjerga, A.
Haflidason, H.
Pedersen, L. E. R.
Pedersen, R. B.
author_sort Stubseid, H. H.
collection PubMed
description Nearly 30% of ocean crust forms at mid-ocean ridges where the spreading rate is less than 20 mm per year. According to the seafloor spreading paradigm, oceanic crust forms along a narrow axial zone and is transported away from the rift valley. However, because quantitative age data of volcanic eruptions are lacking, constructing geological models for the evolution of ultraslow-spreading crust remains a challenge. In this contribution, we use sediment thicknesses acquired from ~4000 km of sub-bottom profiler data combined with (14)C ages from sediment cores to determine the age of the ocean floor of the oblique ultraslow-spreading Mohns Ridge to reveal a systematic pattern of young volcanism outside axial volcanic ridges. Here, we present an age map of the upper lava flows within the rift valley of a mid-ocean ridge and find that nearly half of the rift valley floor has been rejuvenated by volcanic activity during the last 25 Kyr.
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spelling pubmed-103385442023-07-14 Volcanic evolution of an ultraslow-spreading ridge Stubseid, H. H. Bjerga, A. Haflidason, H. Pedersen, L. E. R. Pedersen, R. B. Nat Commun Article Nearly 30% of ocean crust forms at mid-ocean ridges where the spreading rate is less than 20 mm per year. According to the seafloor spreading paradigm, oceanic crust forms along a narrow axial zone and is transported away from the rift valley. However, because quantitative age data of volcanic eruptions are lacking, constructing geological models for the evolution of ultraslow-spreading crust remains a challenge. In this contribution, we use sediment thicknesses acquired from ~4000 km of sub-bottom profiler data combined with (14)C ages from sediment cores to determine the age of the ocean floor of the oblique ultraslow-spreading Mohns Ridge to reveal a systematic pattern of young volcanism outside axial volcanic ridges. Here, we present an age map of the upper lava flows within the rift valley of a mid-ocean ridge and find that nearly half of the rift valley floor has been rejuvenated by volcanic activity during the last 25 Kyr. Nature Publishing Group UK 2023-07-12 /pmc/articles/PMC10338544/ /pubmed/37438364 http://dx.doi.org/10.1038/s41467-023-39925-0 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Stubseid, H. H.
Bjerga, A.
Haflidason, H.
Pedersen, L. E. R.
Pedersen, R. B.
Volcanic evolution of an ultraslow-spreading ridge
title Volcanic evolution of an ultraslow-spreading ridge
title_full Volcanic evolution of an ultraslow-spreading ridge
title_fullStr Volcanic evolution of an ultraslow-spreading ridge
title_full_unstemmed Volcanic evolution of an ultraslow-spreading ridge
title_short Volcanic evolution of an ultraslow-spreading ridge
title_sort volcanic evolution of an ultraslow-spreading ridge
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10338544/
https://www.ncbi.nlm.nih.gov/pubmed/37438364
http://dx.doi.org/10.1038/s41467-023-39925-0
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