Volcanic evolution of an ultraslow-spreading ridge
Abstract 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 volca...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-07-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-023-39925-0 |
| _version_ | 1797778798861615104 |
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| author | H. H. Stubseid A. Bjerga H. Haflidason L. E. R. Pedersen R. B. Pedersen |
| author_facet | H. H. Stubseid A. Bjerga H. Haflidason L. E. R. Pedersen R. B. Pedersen |
| author_sort | H. H. Stubseid |
| collection | DOAJ |
| description | Abstract 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 14C 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. |
| first_indexed | 2024-03-12T23:22:46Z |
| format | Article |
| id | doaj.art-e5939a2e63f541b98e13ef2d14380464 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-12T23:22:46Z |
| publishDate | 2023-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-e5939a2e63f541b98e13ef2d143804642023-07-16T11:21:42ZengNature PortfolioNature Communications2041-17232023-07-011411810.1038/s41467-023-39925-0Volcanic evolution of an ultraslow-spreading ridgeH. H. Stubseid0A. Bjerga1H. Haflidason2L. E. R. Pedersen3R. B. Pedersen4Center for Deep Sea Research and Department of Earth Science, University of BergenCenter for Deep Sea Research and Department of Earth Science, University of BergenCenter for Deep Sea Research and Department of Earth Science, University of BergenCenter for Deep Sea Research and Department of Earth Science, University of BergenCenter for Deep Sea Research and Department of Earth Science, University of BergenAbstract 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 14C 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.https://doi.org/10.1038/s41467-023-39925-0 |
| spellingShingle | H. H. Stubseid A. Bjerga H. Haflidason L. E. R. Pedersen R. B. Pedersen Volcanic evolution of an ultraslow-spreading ridge Nature Communications |
| 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 |
| url | https://doi.org/10.1038/s41467-023-39925-0 |
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