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Giant paleo-seafloor craters and mass wasting associated with magma-induced uplift of the upper crust

Giant seafloor craters are known along many a continental margin with recurrent mass-wasting deposits. However, the impact of breakup-related magmatism on the evolution of such craters is barely understood. Using high-quality geophysical datasets, this work examines the genetic relationship among th...

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Autores principales: Omosanya, K. O., Duffaut, K., Alves, T. M., Eruteya, O. E., Johansen, S. E., Waldmann, N.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8924249/
https://www.ncbi.nlm.nih.gov/pubmed/35293387
http://dx.doi.org/10.1038/s41598-022-08205-0
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author Omosanya, K. O.
Duffaut, K.
Alves, T. M.
Eruteya, O. E.
Johansen, S. E.
Waldmann, N.
author_facet Omosanya, K. O.
Duffaut, K.
Alves, T. M.
Eruteya, O. E.
Johansen, S. E.
Waldmann, N.
author_sort Omosanya, K. O.
collection PubMed
description Giant seafloor craters are known along many a continental margin with recurrent mass-wasting deposits. However, the impact of breakup-related magmatism on the evolution of such craters is barely understood. Using high-quality geophysical datasets, this work examines the genetic relationship among the location of magmatic sills, forced folds and the formation of giant paleo-seafloor craters underneath an ancient mass-transport complex in the Møre and Vøring basins, offshore Norway. The data reveal that forced folding of near-seafloor strata occurred because of the intrusion of several interconnected magmatic sills. Estimates of 1-dimensional uplift based on well data show that uplift occurred due to the intrusion of magma in Upper Cretaceous to Lower Eocene strata. Our findings also prove that subsurface fluid plumbing associated with the magmatic sills was prolonged in time and led to the development of several vertical fluid flow conduits, some of which triggered mass wasting in Neogene to Recent times. The repeated vertical expulsion of subsurface fluids weakened the strata on the continental slope, thereby promoting mass wasting, the selective cannibalization of the paleo-seafloor, and the formation of elongated craters at the basal shear zone of the mass-transport complex. Significantly, the model presented here proves a close link between subsurface magmatic plumbing systems and mass wasting on continental margins.
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spelling pubmed-89242492022-03-17 Giant paleo-seafloor craters and mass wasting associated with magma-induced uplift of the upper crust Omosanya, K. O. Duffaut, K. Alves, T. M. Eruteya, O. E. Johansen, S. E. Waldmann, N. Sci Rep Article Giant seafloor craters are known along many a continental margin with recurrent mass-wasting deposits. However, the impact of breakup-related magmatism on the evolution of such craters is barely understood. Using high-quality geophysical datasets, this work examines the genetic relationship among the location of magmatic sills, forced folds and the formation of giant paleo-seafloor craters underneath an ancient mass-transport complex in the Møre and Vøring basins, offshore Norway. The data reveal that forced folding of near-seafloor strata occurred because of the intrusion of several interconnected magmatic sills. Estimates of 1-dimensional uplift based on well data show that uplift occurred due to the intrusion of magma in Upper Cretaceous to Lower Eocene strata. Our findings also prove that subsurface fluid plumbing associated with the magmatic sills was prolonged in time and led to the development of several vertical fluid flow conduits, some of which triggered mass wasting in Neogene to Recent times. The repeated vertical expulsion of subsurface fluids weakened the strata on the continental slope, thereby promoting mass wasting, the selective cannibalization of the paleo-seafloor, and the formation of elongated craters at the basal shear zone of the mass-transport complex. Significantly, the model presented here proves a close link between subsurface magmatic plumbing systems and mass wasting on continental margins. Nature Publishing Group UK 2022-03-15 /pmc/articles/PMC8924249/ /pubmed/35293387 http://dx.doi.org/10.1038/s41598-022-08205-0 Text en © The Author(s) 2022 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
Omosanya, K. O.
Duffaut, K.
Alves, T. M.
Eruteya, O. E.
Johansen, S. E.
Waldmann, N.
Giant paleo-seafloor craters and mass wasting associated with magma-induced uplift of the upper crust
title Giant paleo-seafloor craters and mass wasting associated with magma-induced uplift of the upper crust
title_full Giant paleo-seafloor craters and mass wasting associated with magma-induced uplift of the upper crust
title_fullStr Giant paleo-seafloor craters and mass wasting associated with magma-induced uplift of the upper crust
title_full_unstemmed Giant paleo-seafloor craters and mass wasting associated with magma-induced uplift of the upper crust
title_short Giant paleo-seafloor craters and mass wasting associated with magma-induced uplift of the upper crust
title_sort giant paleo-seafloor craters and mass wasting associated with magma-induced uplift of the upper crust
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8924249/
https://www.ncbi.nlm.nih.gov/pubmed/35293387
http://dx.doi.org/10.1038/s41598-022-08205-0
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