An investigation into the role of time-dependent cohesion in interseismic fault restrengthening

Abstract Earthquakes typically exhibit recurrence times that far exceed time-scales attainable in a laboratory setting. To traverse the temporal gap between the laboratory and nature, the slide-hold-slide test is commonly employed as a laboratory analogue for the seismic cycle, from which the time-d...

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Autores principales:	M. P. A. van den Ende, A. R. Niemeijer
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/dd55c1fadcf44c35a5fbbba346bd8088
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spelling	oai:doaj.org-article:dd55c1fadcf44c35a5fbbba346bd80882021-12-02T15:09:58ZAn investigation into the role of time-dependent cohesion in interseismic fault restrengthening10.1038/s41598-019-46241-52045-2322https://doaj.org/article/dd55c1fadcf44c35a5fbbba346bd80882019-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-46241-5https://doaj.org/toc/2045-2322Abstract Earthquakes typically exhibit recurrence times that far exceed time-scales attainable in a laboratory setting. To traverse the temporal gap between the laboratory and nature, the slide-hold-slide test is commonly employed as a laboratory analogue for the seismic cycle, from which the time-dependence of fault strength may be assessed. In many studies it is implicitly assumed that all fault restrengthening emanates from an increase in the internal friction coefficient, neglecting contributions from cohesion. By doing so, important information is lost that is relevant for numerical simulations of seismicity on natural faults, as well as for induced seismicity. We conduct slide-hold-slide experiments on granular halite gouge at various normal stresses to assess the time-dependence of the internal coefficient of friction, and of the cohesion, independently of one another. These experiments reveal that both the internal friction coefficient and cohesion increase over time, but that these quantities do not share a common evolution, suggesting different underlying mechanisms.M. P. A. van den EndeA. R. NiemeijerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-11 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q M. P. A. van den Ende A. R. Niemeijer An investigation into the role of time-dependent cohesion in interseismic fault restrengthening
description	Abstract Earthquakes typically exhibit recurrence times that far exceed time-scales attainable in a laboratory setting. To traverse the temporal gap between the laboratory and nature, the slide-hold-slide test is commonly employed as a laboratory analogue for the seismic cycle, from which the time-dependence of fault strength may be assessed. In many studies it is implicitly assumed that all fault restrengthening emanates from an increase in the internal friction coefficient, neglecting contributions from cohesion. By doing so, important information is lost that is relevant for numerical simulations of seismicity on natural faults, as well as for induced seismicity. We conduct slide-hold-slide experiments on granular halite gouge at various normal stresses to assess the time-dependence of the internal coefficient of friction, and of the cohesion, independently of one another. These experiments reveal that both the internal friction coefficient and cohesion increase over time, but that these quantities do not share a common evolution, suggesting different underlying mechanisms.
format	article
author	M. P. A. van den Ende A. R. Niemeijer
author_facet	M. P. A. van den Ende A. R. Niemeijer
author_sort	M. P. A. van den Ende
title	An investigation into the role of time-dependent cohesion in interseismic fault restrengthening
title_short	An investigation into the role of time-dependent cohesion in interseismic fault restrengthening
title_full	An investigation into the role of time-dependent cohesion in interseismic fault restrengthening
title_fullStr	An investigation into the role of time-dependent cohesion in interseismic fault restrengthening
title_full_unstemmed	An investigation into the role of time-dependent cohesion in interseismic fault restrengthening
title_sort	investigation into the role of time-dependent cohesion in interseismic fault restrengthening
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/dd55c1fadcf44c35a5fbbba346bd8088
work_keys_str_mv	AT mpavandenende aninvestigationintotheroleoftimedependentcohesionininterseismicfaultrestrengthening AT arniemeijer aninvestigationintotheroleoftimedependentcohesionininterseismicfaultrestrengthening AT mpavandenende investigationintotheroleoftimedependentcohesionininterseismicfaultrestrengthening AT arniemeijer investigationintotheroleoftimedependentcohesionininterseismicfaultrestrengthening
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An investigation into the role of time-dependent cohesion in interseismic fault restrengthening

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