Response of salt structures to loading and unloading by ice-sheets – insights from numerical modelling ...
Salt rocks are mechanically weak and behave like viscous fluids when deforming at geological time scales and strain rates. The weight of an ice sheet advancing into a salt-bearing basin may cause sufficient differential load to induce salt flow. Ice loading has been postulated as a trigger for Pleis...
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Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
2023
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Online Access: | https://dx.doi.org/10.48380/db41-3908 https://www.dggv.de/e-publikationen/response-of-salt-structures-to-loading-and-unloading-by-ice-sheets-insights-from-numerical-modelling |
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ftdatacite:10.48380/db41-3908 2024-01-28T10:06:30+01:00 Response of salt structures to loading and unloading by ice-sheets – insights from numerical modelling ... Lang, Jörg Hampel, Andrea 2023 https://dx.doi.org/10.48380/db41-3908 https://www.dggv.de/e-publikationen/response-of-salt-structures-to-loading-and-unloading-by-ice-sheets-insights-from-numerical-modelling en eng Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV) Abstract ScholaryArticle Text article-journal 2023 ftdatacite https://doi.org/10.48380/db41-3908 2024-01-04T23:35:11Z Salt rocks are mechanically weak and behave like viscous fluids when deforming at geological time scales and strain rates. The weight of an ice sheet advancing into a salt-bearing basin may cause sufficient differential load to induce salt flow. Ice loading has been postulated as a trigger for Pleistocene deformation at a number of salt structures in the Central European Basin System. We conducted 2D-finite-element models (ABAQUS) with a setup representing a simplified salt diapir to test existing conceptual models and evaluate the controlling factors. Different parameter sets for the rheology of salt and overburden rocks, including linear versus non-linear viscosity of the salt, were tested. Model results show lateral salt flow into the diapir and diapiric rise during the ice advance, while a transgression of the diapir by the ice sheet leads to overall downwards displacement. During unloading, displacements are largely restored due to the dominance of the elastic response. Displacements never exceed few ... Text Ice Sheet DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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English |
description |
Salt rocks are mechanically weak and behave like viscous fluids when deforming at geological time scales and strain rates. The weight of an ice sheet advancing into a salt-bearing basin may cause sufficient differential load to induce salt flow. Ice loading has been postulated as a trigger for Pleistocene deformation at a number of salt structures in the Central European Basin System. We conducted 2D-finite-element models (ABAQUS) with a setup representing a simplified salt diapir to test existing conceptual models and evaluate the controlling factors. Different parameter sets for the rheology of salt and overburden rocks, including linear versus non-linear viscosity of the salt, were tested. Model results show lateral salt flow into the diapir and diapiric rise during the ice advance, while a transgression of the diapir by the ice sheet leads to overall downwards displacement. During unloading, displacements are largely restored due to the dominance of the elastic response. Displacements never exceed few ... |
format |
Text |
author |
Lang, Jörg Hampel, Andrea |
spellingShingle |
Lang, Jörg Hampel, Andrea Response of salt structures to loading and unloading by ice-sheets – insights from numerical modelling ... |
author_facet |
Lang, Jörg Hampel, Andrea |
author_sort |
Lang, Jörg |
title |
Response of salt structures to loading and unloading by ice-sheets – insights from numerical modelling ... |
title_short |
Response of salt structures to loading and unloading by ice-sheets – insights from numerical modelling ... |
title_full |
Response of salt structures to loading and unloading by ice-sheets – insights from numerical modelling ... |
title_fullStr |
Response of salt structures to loading and unloading by ice-sheets – insights from numerical modelling ... |
title_full_unstemmed |
Response of salt structures to loading and unloading by ice-sheets – insights from numerical modelling ... |
title_sort |
response of salt structures to loading and unloading by ice-sheets – insights from numerical modelling ... |
publisher |
Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV) |
publishDate |
2023 |
url |
https://dx.doi.org/10.48380/db41-3908 https://www.dggv.de/e-publikationen/response-of-salt-structures-to-loading-and-unloading-by-ice-sheets-insights-from-numerical-modelling |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_doi |
https://doi.org/10.48380/db41-3908 |
_version_ |
1789333427093241856 |