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<identifier>oai:HAL:hal-01172352v1</identifier>
<datestamp>2018-01-11</datestamp>
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<publisher>HAL CCSD</publisher>
<title lang=en>Brittle versus ductile deformation as the main control of the deep fluid circulation in oceanic crust</title>
<creator>Violay, Marie</creator>
<creator>Gibert, Benoit</creator>
<creator>MAINPRICE, David</creator>
<creator>Burg, Jean-Pierre</creator>
<contributor>Eidgenössische Technische Hochschule [Zürich] (ETH Zürich)</contributor>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Manteau et Interfaces ; Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS) - Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>ISSN: 0094-8276</source>
<source>EISSN: 1944-8007</source>
<source>Geophysical Research Letters</source>
<publisher>American Geophysical Union (AGU)</publisher>
<publisher>American Geophysical Union</publisher>
<identifier>hal-01172352</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01172352</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01172352</source>
<source>Geophysical Research Letters, American Geophysical Union, 2015, 42 (8), pp.2767-2773. 〈10.1002/2015GL063437〉</source>
<identifier>DOI : 10.1002/2015GL063437</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1002/2015GL063437</relation>
<language>en</language>
<subject lang=en>deformation</subject>
<subject lang=en>dilatancy</subject>
<subject lang=en>porosity</subject>
<subject lang=en>brittle to ductile transition</subject>
<subject lang=en>hydrothermal circulation</subject>
<subject>[SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>The brittle to ductile transition may strongly influence hydraulic properties of rocks at the depth and temperature ranges that hydrothermal fluids circulate. To examine this transition in the context of the oceanic crust, we conducted a series of deformation experiments on a natural basalt sample at in situ oceanic crust conditions. Dilatancy was measured during deformation. The method consisted in monitoring the volume of pore fluid that flows into or out of the sample at constant pore pressure. Mechanical and microstructural observations at experimental constant strain rate of 10−5 s−1 indicated that the basalt was brittle and dilatant up to 800°C. At higher temperature, the deformation mode became macroscopically ductile and samples compacted. These observations have important implications on heat transfer and fluid migration in oceanic crust.</description>
<date>2015-04-28</date>
</dc>
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