From point defects to plate tectonic faults
Identifieur interne : 009F19 ( Main/Exploration ); précédent : 009F18; suivant : 009F20From point defects to plate tectonic faults
Auteurs : K. Regenauer-Lieb [Australie, Allemagne] ; B. Hobbs [Australie] ; D. A. Yuen [États-Unis] ; A. Ord [Australie] ; Y. Zhang [Australie] ; H. B. Mulhaus [Australie] ; G. Morra [Suisse]Source :
- Philosophical magazine : (2003. Print) [ 1478-6435 ] ; 2006.
Descripteurs français
- Pascal (Inist)
- Tectonique plaque, Convection, Système hors équilibre, Croissance grain, Diffusion thermique, Transfert chaleur, Défaut ponctuel, Géophysique, Terre, Mésoéchelle, Plaque, Défaut réseau, Matériau cristallin, Equation constitutive, Modélisation, Méthode échelle multiple, Solution faible, Thermodynamique, Modèle phénoménologique, Loi échelle, Autocohérence, Equation réaction diffusion, Mobilité.
- Wicri :
- topic : Géophysique, Thermodynamique.
English descriptors
- KwdEn :
- Crystalline material, Earth, Grain growth, Lattice defect, Mesoscale, Modeling, Multiscale method, Non equilibrium system, Phenomenological model, Reaction diffusion equation, Scaling law, Self consistency, Thermal diffusion, Weak solution, constitutive equation, convection, geophysics, heat transfer, mobility, plate tectonics, plates, point defects, thermodynamics.
Abstract
Understanding and. explaining emergent constitutive laws in the multi-scale evolution from point defects, dislocations and two-dimensional defects to plate tectonic scales is an arduous challenge in condensed matter physics. The Earth appears to be the only planet known to have developed stable plate tectonics as a means to get rid of its heat. The emergence of plate tectonics out of mantle convection appears to rely intrinsically on the capacity to form extremely weak faults in the top 100km of the planet. These faults have a memory of at least several hundred millions of years, yet they appear to rely on the effects of water on line defects. This important phenomenon was first discovered in laboratory and dubbed "hydrolytic weakening". At the large scale it explains cycles of co-located resurgence of plate generation and consumption (the Wilson cycle), but the exact physics underlying the process itself and the enormous spanning of scales still remains unclear. We present an attempt to use the multi-scale non-equilibrium thermodynamic energy evolution inside the deforming lithosphere to move phenomenological laws to laws derived from basic scaling quantities, develop self-consistent weakening laws at lithospheric scale and give a fully coupled deformation-weakening constitutive framework. At meso- to plate scale we encounter in a stepwise manner three basic domains governed by the diffusion/reaction time scales of grain growth, thermal diffusion and finally water mobility through point defects in the crystalline lattice. The latter process governs the planetary scale and controls the stability of its heat transfer mode.
Affiliations:
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Regenauer-Lieb</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Earth and Geographical Sciences, The University of Western Australia</s1><s3>AUS</s3><sZ>1 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>School of Earth and Geographical Sciences, The University of Western Australia</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Johannes Gutenberg-Universität Mainz, Geophysics & Geodynamics</s1><s2>55099 Mainz</s2><s3>DEU</s3><sZ>1 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>55099 Mainz</wicri:noRegion><wicri:noRegion>Geophysics & Geodynamics</wicri:noRegion><wicri:noRegion>55099 Mainz</wicri:noRegion></affiliation></author><author><name sortKey="Hobbs, B" sort="Hobbs, B" uniqKey="Hobbs B" first="B." last="Hobbs">B. 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Regenauer-Lieb</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Earth and Geographical Sciences, The University of Western Australia</s1><s3>AUS</s3><sZ>1 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>School of Earth and Geographical Sciences, The University of Western Australia</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Johannes Gutenberg-Universität Mainz, Geophysics & Geodynamics</s1><s2>55099 Mainz</s2><s3>DEU</s3><sZ>1 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>55099 Mainz</wicri:noRegion><wicri:noRegion>Geophysics & Geodynamics</wicri:noRegion><wicri:noRegion>55099 Mainz</wicri:noRegion></affiliation></author><author><name sortKey="Hobbs, B" sort="Hobbs, B" uniqKey="Hobbs B" first="B." last="Hobbs">B. Hobbs</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>CSIRO Exploration and Mining Perth (ARRC), PO Box 1130</s1><s2>Bentley WA 6102</s2><s3>AUS</s3><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Bentley WA 6102</wicri:noRegion></affiliation></author><author><name sortKey="Yuen, D A" sort="Yuen, D A" uniqKey="Yuen D" first="D. A." last="Yuen">D. A. Yuen</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Department of Geology and Geophysics and Supercomputer Institute, University of Minnesota Minneapolis</s1><s2>Minnesota 55455</s2><s3>USA</s3><sZ>3 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Minnesota 55455</wicri:noRegion></affiliation></author><author><name sortKey="Ord, A" sort="Ord, A" uniqKey="Ord A" first="A." last="Ord">A. Ord</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>CSIRO Exploration and Mining Perth (ARRC), PO Box 1130</s1><s2>Bentley WA 6102</s2><s3>AUS</s3><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Bentley WA 6102</wicri:noRegion></affiliation></author><author><name sortKey="Zhang, Y" sort="Zhang, Y" uniqKey="Zhang Y" first="Y." last="Zhang">Y. Zhang</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>CSIRO Exploration and Mining Perth (ARRC), PO Box 1130</s1><s2>Bentley WA 6102</s2><s3>AUS</s3><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Bentley WA 6102</wicri:noRegion></affiliation></author><author><name sortKey="Mulhaus, H B" sort="Mulhaus, H B" uniqKey="Mulhaus H" first="H. B." last="Mulhaus">H. B. Mulhaus</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>ESSCC, The University of Queensland</s1><s2>St Lucia, QLD 4072</s2><s3>AUS</s3><sZ>6 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>St Lucia, QLD 4072</wicri:noRegion></affiliation></author><author><name sortKey="Morra, G" sort="Morra, G" uniqKey="Morra G" first="G." last="Morra">G. Morra</name><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>ETH Zürich, Institute of Geophysics</s1><s2>8093, Hönggerberg</s2><s3>CHE</s3><sZ>7 aut.</sZ></inist:fA14><country>Suisse</country><wicri:noRegion>8093, Hönggerberg</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Philosophical magazine : (2003. Print)</title><title level="j" type="abbreviated">Philos. mag. : (2003, Print)</title><idno type="ISSN">1478-6435</idno><imprint><date when="2006">2006</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Philosophical magazine : (2003. Print)</title><title level="j" type="abbreviated">Philos. mag. : (2003, Print)</title><idno type="ISSN">1478-6435</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Crystalline material</term><term>Earth</term><term>Grain growth</term><term>Lattice defect</term><term>Mesoscale</term><term>Modeling</term><term>Multiscale method</term><term>Non equilibrium system</term><term>Phenomenological model</term><term>Reaction diffusion equation</term><term>Scaling law</term><term>Self consistency</term><term>Thermal diffusion</term><term>Weak solution</term><term>constitutive equation</term><term>convection</term><term>geophysics</term><term>heat transfer</term><term>mobility</term><term>plate tectonics</term><term>plates</term><term>point defects</term><term>thermodynamics</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Tectonique plaque</term><term>Convection</term><term>Système hors équilibre</term><term>Croissance grain</term><term>Diffusion thermique</term><term>Transfert chaleur</term><term>Défaut ponctuel</term><term>Géophysique</term><term>Terre</term><term>Mésoéchelle</term><term>Plaque</term><term>Défaut réseau</term><term>Matériau cristallin</term><term>Equation constitutive</term><term>Modélisation</term><term>Méthode échelle multiple</term><term>Solution faible</term><term>Thermodynamique</term><term>Modèle phénoménologique</term><term>Loi échelle</term><term>Autocohérence</term><term>Equation réaction diffusion</term><term>Mobilité</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Géophysique</term><term>Thermodynamique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Understanding and. explaining emergent constitutive laws in the multi-scale evolution from point defects, dislocations and two-dimensional defects to plate tectonic scales is an arduous challenge in condensed matter physics. The Earth appears to be the only planet known to have developed stable plate tectonics as a means to get rid of its heat. The emergence of plate tectonics out of mantle convection appears to rely intrinsically on the capacity to form extremely weak faults in the top 100km of the planet. These faults have a memory of at least several hundred millions of years, yet they appear to rely on the effects of water on line defects. This important phenomenon was first discovered in laboratory and dubbed "hydrolytic weakening". At the large scale it explains cycles of co-located resurgence of plate generation and consumption (the Wilson cycle), but the exact physics underlying the process itself and the enormous spanning of scales still remains unclear. We present an attempt to use the multi-scale non-equilibrium thermodynamic energy evolution inside the deforming lithosphere to move phenomenological laws to laws derived from basic scaling quantities, develop self-consistent weakening laws at lithospheric scale and give a fully coupled deformation-weakening constitutive framework. At meso- to plate scale we encounter in a stepwise manner three basic domains governed by the diffusion/reaction time scales of grain growth, thermal diffusion and finally water mobility through point defects in the crystalline lattice. The latter process governs the planetary scale and controls the stability of its heat transfer mode.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Australie</li><li>Suisse</li><li>États-Unis</li></country></list><tree><country name="Australie"><noRegion><name sortKey="Regenauer Lieb, K" sort="Regenauer Lieb, K" uniqKey="Regenauer Lieb K" first="K." last="Regenauer-Lieb">K. Regenauer-Lieb</name></noRegion><name sortKey="Hobbs, B" sort="Hobbs, B" uniqKey="Hobbs B" first="B." last="Hobbs">B. Hobbs</name><name sortKey="Mulhaus, H B" sort="Mulhaus, H B" uniqKey="Mulhaus H" first="H. B." last="Mulhaus">H. B. Mulhaus</name><name sortKey="Ord, A" sort="Ord, A" uniqKey="Ord A" first="A." last="Ord">A. Ord</name><name sortKey="Zhang, Y" sort="Zhang, Y" uniqKey="Zhang Y" first="Y." last="Zhang">Y. Zhang</name></country><country name="Allemagne"><noRegion><name sortKey="Regenauer Lieb, K" sort="Regenauer Lieb, K" uniqKey="Regenauer Lieb K" first="K." last="Regenauer-Lieb">K. Regenauer-Lieb</name></noRegion></country><country name="États-Unis"><noRegion><name sortKey="Yuen, D A" sort="Yuen, D A" uniqKey="Yuen D" first="D. A." last="Yuen">D. A. Yuen</name></noRegion></country><country name="Suisse"><noRegion><name sortKey="Morra, G" sort="Morra, G" uniqKey="Morra G" first="G." last="Morra">G. 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