Surface processes forcing on extensional rock melting
Abstract Surface processes and magmatism condition the structural evolution of continental rifts and passive margins through mechanical and thermal effects on the lithosphere rheology. However, their inter-relationships in extensional settings are largely unknown. Here, I use coupled thermo-mechanic...
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2020
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Online Access: | http://dx.doi.org/10.1038/s41598-020-63920-w http://www.nature.com/articles/s41598-020-63920-w.pdf http://www.nature.com/articles/s41598-020-63920-w |
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crspringernat:10.1038/s41598-020-63920-w 2023-05-15T17:22:21+02:00 Surface processes forcing on extensional rock melting Sternai, Pietro 2020 http://dx.doi.org/10.1038/s41598-020-63920-w http://www.nature.com/articles/s41598-020-63920-w.pdf http://www.nature.com/articles/s41598-020-63920-w en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Scientific Reports volume 10, issue 1 ISSN 2045-2322 Multidisciplinary journal-article 2020 crspringernat https://doi.org/10.1038/s41598-020-63920-w 2022-01-04T11:12:25Z Abstract Surface processes and magmatism condition the structural evolution of continental rifts and passive margins through mechanical and thermal effects on the lithosphere rheology. However, their inter-relationships in extensional settings are largely unknown. Here, I use coupled thermo-mechanical geodynamic and landscape evolution numerical modeling to assess the links between erosion of rift shoulders, sedimentation within the rift basin and extensional rock melting. Results suggest that, when the crust is thinner than ~40 km, the extension rate is slower than ~2 cm/yr and the mantle potential temperature is below ~1230 °C, efficient surface processes may double crustal melting by Moho lowering and inhibit mantle decompression melting by ~50% through sediment loading within the rift basin. It is thus likely that surface processes significantly influenced the magmatic activity of a number of extensional settings worldwide – e.g. the Mediterranean, the Gulf of California, the Iberia-Newfoundland margin, and the South China Sea. Because magmatism and surface processes affect jointly the geological carbon cycle, the surface processes forcing on extensional rock melting investigated here involves an additional means of linkage between plate tectonics and climate changes. Article in Journal/Newspaper Newfoundland Springer Nature (via Crossref) Scientific Reports 10 1 |
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Springer Nature (via Crossref) |
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English |
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Multidisciplinary |
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Multidisciplinary Sternai, Pietro Surface processes forcing on extensional rock melting |
topic_facet |
Multidisciplinary |
description |
Abstract Surface processes and magmatism condition the structural evolution of continental rifts and passive margins through mechanical and thermal effects on the lithosphere rheology. However, their inter-relationships in extensional settings are largely unknown. Here, I use coupled thermo-mechanical geodynamic and landscape evolution numerical modeling to assess the links between erosion of rift shoulders, sedimentation within the rift basin and extensional rock melting. Results suggest that, when the crust is thinner than ~40 km, the extension rate is slower than ~2 cm/yr and the mantle potential temperature is below ~1230 °C, efficient surface processes may double crustal melting by Moho lowering and inhibit mantle decompression melting by ~50% through sediment loading within the rift basin. It is thus likely that surface processes significantly influenced the magmatic activity of a number of extensional settings worldwide – e.g. the Mediterranean, the Gulf of California, the Iberia-Newfoundland margin, and the South China Sea. Because magmatism and surface processes affect jointly the geological carbon cycle, the surface processes forcing on extensional rock melting investigated here involves an additional means of linkage between plate tectonics and climate changes. |
format |
Article in Journal/Newspaper |
author |
Sternai, Pietro |
author_facet |
Sternai, Pietro |
author_sort |
Sternai, Pietro |
title |
Surface processes forcing on extensional rock melting |
title_short |
Surface processes forcing on extensional rock melting |
title_full |
Surface processes forcing on extensional rock melting |
title_fullStr |
Surface processes forcing on extensional rock melting |
title_full_unstemmed |
Surface processes forcing on extensional rock melting |
title_sort |
surface processes forcing on extensional rock melting |
publisher |
Springer Science and Business Media LLC |
publishDate |
2020 |
url |
http://dx.doi.org/10.1038/s41598-020-63920-w http://www.nature.com/articles/s41598-020-63920-w.pdf http://www.nature.com/articles/s41598-020-63920-w |
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Newfoundland |
genre_facet |
Newfoundland |
op_source |
Scientific Reports volume 10, issue 1 ISSN 2045-2322 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-020-63920-w |
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Scientific Reports |
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10 |
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1766108948919746560 |