Dislocation dynamics modelling of the power-law breakdown in olivine single crystals: Toward a unified creep law for the upper mantle

In the present work, we use a numerical modelling approach based on 2.5-dimensional dislocation dynamics simulations to investigate the transition between the power and the exponential laws in olivine for temperatures ranging between 800 K and 1700 K and stresses between 100 and 500 MPa. We model th...
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Autor*in:	Gouriet, Karine [verfasserIn] Cordier, Patrick [verfasserIn] Garel, Fanny [verfasserIn] Thoraval, Catherine [verfasserIn] Demouchy, Sylvie [verfasserIn] Tommasi, Andréa [verfasserIn] Carrez, Philippe [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2018

Schlagwörter:	olivine rheology creep dislocation glide dislocation climb Earth mantle numerical modelling

Übergeordnetes Werk:	Enthalten in: Earth and planetary science letters - Amsterdam [u.a.] : Elsevier, 1966, 506, Seite 282-291
Übergeordnetes Werk:	volume:506 ; pages:282-291

DOI / URN:	10.1016/j.epsl.2018.10.049

Katalog-ID:	ELV001240250

Internformat


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100	1		\|a Gouriet, Karine \|e verfasserin \|4 aut
245	1	0	\|a Dislocation dynamics modelling of the power-law breakdown in olivine single crystals: Toward a unified creep law for the upper mantle
264		1	\|c 2018
336			\|a nicht spezifiziert \|b zzz \|2 rdacontent
337			\|a Computermedien \|b c \|2 rdamedia
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520			\|a In the present work, we use a numerical modelling approach based on 2.5-dimensional dislocation dynamics simulations to investigate the transition between the power and the exponential laws in olivine for temperatures ranging between 800 K and 1700 K and stresses between 100 and 500 MPa. We model the deformation of an olivine crystal by the interplay of glide and climb of dislocations. Plastic strain is produced by glide, the amount of gliding dislocations being controlled by climb acting as a recovery mechanism. Within this framework, and without the need of introducing any other mechanism, our model reproduces a power law breakdown above 200 MPa. Consequently, we conclude that the use of two rheological laws to describe the creep of olivine can be motivated by convenience, but is not imposed by theoretical needs. Alternatively a unified creep law can be proposed to describe the rheology of olivine in a wide range of temperature relevant for the upper mantle. This flow law may have an exponential form and describe the entire range of experimental data, from room temperature to 1800 K at both low and high stresses, using a single adjusting parameter, the so-called mechanical resistance σ ˜ . We also propose an alternative mathematical expression based on a sigmoid function, which is more suitable for implementation in geodynamical models.
650		4	\|a olivine rheology
650		4	\|a creep
650		4	\|a dislocation glide
650		4	\|a dislocation climb
650		4	\|a Earth mantle
650		4	\|a numerical modelling
700	1		\|a Cordier, Patrick \|e verfasserin \|0 (orcid)0000-0002-1883-2994 \|4 aut
700	1		\|a Garel, Fanny \|e verfasserin \|4 aut
700	1		\|a Thoraval, Catherine \|e verfasserin \|4 aut
700	1		\|a Demouchy, Sylvie \|e verfasserin \|4 aut
700	1		\|a Tommasi, Andréa \|e verfasserin \|0 (orcid)0000-0002-6457-1852 \|4 aut
700	1		\|a Carrez, Philippe \|e verfasserin \|4 aut
773	0	8	\|i Enthalten in \|t Earth and planetary science letters \|d Amsterdam [u.a.] : Elsevier, 1966 \|g 506, Seite 282-291 \|h Online-Ressource \|w (DE-627)266015778 \|w (DE-600)1466659-5 \|w (DE-576)074959980 \|x 1385-013X \|7 nnns
773	1	8	\|g volume:506 \|g pages:282-291
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936	b	k	\|a 38.35 \|j Endogene Geologie: Allgemeines
936	b	k	\|a 39.29 \|j Theoretische Astronomie: Sonstiges
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952			\|d 506 \|h 282-291

Indexfelder

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matchkey_str	article:1385013X:2018----::ilctodnmcmdligfhpwrabekonnlvnsnlcytltwranf
hierarchy_sort_str	2018
bklnumber	38.35 39.29
publishDate	2018
allfields	10.1016/j.epsl.2018.10.049 doi (DE-627)ELV001240250 (ELSEVIER)S0012-821X(18)30651-4 DE-627 ger DE-627 rda eng 550 DE-600 38.35 bkl 39.29 bkl Gouriet, Karine verfasserin aut Dislocation dynamics modelling of the power-law breakdown in olivine single crystals: Toward a unified creep law for the upper mantle 2018 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In the present work, we use a numerical modelling approach based on 2.5-dimensional dislocation dynamics simulations to investigate the transition between the power and the exponential laws in olivine for temperatures ranging between 800 K and 1700 K and stresses between 100 and 500 MPa. We model the deformation of an olivine crystal by the interplay of glide and climb of dislocations. Plastic strain is produced by glide, the amount of gliding dislocations being controlled by climb acting as a recovery mechanism. Within this framework, and without the need of introducing any other mechanism, our model reproduces a power law breakdown above 200 MPa. Consequently, we conclude that the use of two rheological laws to describe the creep of olivine can be motivated by convenience, but is not imposed by theoretical needs. Alternatively a unified creep law can be proposed to describe the rheology of olivine in a wide range of temperature relevant for the upper mantle. This flow law may have an exponential form and describe the entire range of experimental data, from room temperature to 1800 K at both low and high stresses, using a single adjusting parameter, the so-called mechanical resistance σ ˜ . We also propose an alternative mathematical expression based on a sigmoid function, which is more suitable for implementation in geodynamical models. olivine rheology creep dislocation glide dislocation climb Earth mantle numerical modelling Cordier, Patrick verfasserin (orcid)0000-0002-1883-2994 aut Garel, Fanny verfasserin aut Thoraval, Catherine verfasserin aut Demouchy, Sylvie verfasserin aut Tommasi, Andréa verfasserin (orcid)0000-0002-6457-1852 aut Carrez, Philippe verfasserin aut Enthalten in Earth and planetary science letters Amsterdam [u.a.] : Elsevier, 1966 506, Seite 282-291 Online-Ressource (DE-627)266015778 (DE-600)1466659-5 (DE-576)074959980 1385-013X nnns volume:506 pages:282-291 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 38.35 Endogene Geologie: Allgemeines 39.29 Theoretische Astronomie: Sonstiges AR 506 282-291
spelling	10.1016/j.epsl.2018.10.049 doi (DE-627)ELV001240250 (ELSEVIER)S0012-821X(18)30651-4 DE-627 ger DE-627 rda eng 550 DE-600 38.35 bkl 39.29 bkl Gouriet, Karine verfasserin aut Dislocation dynamics modelling of the power-law breakdown in olivine single crystals: Toward a unified creep law for the upper mantle 2018 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In the present work, we use a numerical modelling approach based on 2.5-dimensional dislocation dynamics simulations to investigate the transition between the power and the exponential laws in olivine for temperatures ranging between 800 K and 1700 K and stresses between 100 and 500 MPa. We model the deformation of an olivine crystal by the interplay of glide and climb of dislocations. Plastic strain is produced by glide, the amount of gliding dislocations being controlled by climb acting as a recovery mechanism. Within this framework, and without the need of introducing any other mechanism, our model reproduces a power law breakdown above 200 MPa. Consequently, we conclude that the use of two rheological laws to describe the creep of olivine can be motivated by convenience, but is not imposed by theoretical needs. Alternatively a unified creep law can be proposed to describe the rheology of olivine in a wide range of temperature relevant for the upper mantle. This flow law may have an exponential form and describe the entire range of experimental data, from room temperature to 1800 K at both low and high stresses, using a single adjusting parameter, the so-called mechanical resistance σ ˜ . We also propose an alternative mathematical expression based on a sigmoid function, which is more suitable for implementation in geodynamical models. olivine rheology creep dislocation glide dislocation climb Earth mantle numerical modelling Cordier, Patrick verfasserin (orcid)0000-0002-1883-2994 aut Garel, Fanny verfasserin aut Thoraval, Catherine verfasserin aut Demouchy, Sylvie verfasserin aut Tommasi, Andréa verfasserin (orcid)0000-0002-6457-1852 aut Carrez, Philippe verfasserin aut Enthalten in Earth and planetary science letters Amsterdam [u.a.] : Elsevier, 1966 506, Seite 282-291 Online-Ressource (DE-627)266015778 (DE-600)1466659-5 (DE-576)074959980 1385-013X nnns volume:506 pages:282-291 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 38.35 Endogene Geologie: Allgemeines 39.29 Theoretische Astronomie: Sonstiges AR 506 282-291
allfields_unstemmed	10.1016/j.epsl.2018.10.049 doi (DE-627)ELV001240250 (ELSEVIER)S0012-821X(18)30651-4 DE-627 ger DE-627 rda eng 550 DE-600 38.35 bkl 39.29 bkl Gouriet, Karine verfasserin aut Dislocation dynamics modelling of the power-law breakdown in olivine single crystals: Toward a unified creep law for the upper mantle 2018 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In the present work, we use a numerical modelling approach based on 2.5-dimensional dislocation dynamics simulations to investigate the transition between the power and the exponential laws in olivine for temperatures ranging between 800 K and 1700 K and stresses between 100 and 500 MPa. We model the deformation of an olivine crystal by the interplay of glide and climb of dislocations. Plastic strain is produced by glide, the amount of gliding dislocations being controlled by climb acting as a recovery mechanism. Within this framework, and without the need of introducing any other mechanism, our model reproduces a power law breakdown above 200 MPa. Consequently, we conclude that the use of two rheological laws to describe the creep of olivine can be motivated by convenience, but is not imposed by theoretical needs. Alternatively a unified creep law can be proposed to describe the rheology of olivine in a wide range of temperature relevant for the upper mantle. This flow law may have an exponential form and describe the entire range of experimental data, from room temperature to 1800 K at both low and high stresses, using a single adjusting parameter, the so-called mechanical resistance σ ˜ . We also propose an alternative mathematical expression based on a sigmoid function, which is more suitable for implementation in geodynamical models. olivine rheology creep dislocation glide dislocation climb Earth mantle numerical modelling Cordier, Patrick verfasserin (orcid)0000-0002-1883-2994 aut Garel, Fanny verfasserin aut Thoraval, Catherine verfasserin aut Demouchy, Sylvie verfasserin aut Tommasi, Andréa verfasserin (orcid)0000-0002-6457-1852 aut Carrez, Philippe verfasserin aut Enthalten in Earth and planetary science letters Amsterdam [u.a.] : Elsevier, 1966 506, Seite 282-291 Online-Ressource (DE-627)266015778 (DE-600)1466659-5 (DE-576)074959980 1385-013X nnns volume:506 pages:282-291 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 38.35 Endogene Geologie: Allgemeines 39.29 Theoretische Astronomie: Sonstiges AR 506 282-291
allfieldsGer	10.1016/j.epsl.2018.10.049 doi (DE-627)ELV001240250 (ELSEVIER)S0012-821X(18)30651-4 DE-627 ger DE-627 rda eng 550 DE-600 38.35 bkl 39.29 bkl Gouriet, Karine verfasserin aut Dislocation dynamics modelling of the power-law breakdown in olivine single crystals: Toward a unified creep law for the upper mantle 2018 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In the present work, we use a numerical modelling approach based on 2.5-dimensional dislocation dynamics simulations to investigate the transition between the power and the exponential laws in olivine for temperatures ranging between 800 K and 1700 K and stresses between 100 and 500 MPa. We model the deformation of an olivine crystal by the interplay of glide and climb of dislocations. Plastic strain is produced by glide, the amount of gliding dislocations being controlled by climb acting as a recovery mechanism. Within this framework, and without the need of introducing any other mechanism, our model reproduces a power law breakdown above 200 MPa. Consequently, we conclude that the use of two rheological laws to describe the creep of olivine can be motivated by convenience, but is not imposed by theoretical needs. Alternatively a unified creep law can be proposed to describe the rheology of olivine in a wide range of temperature relevant for the upper mantle. This flow law may have an exponential form and describe the entire range of experimental data, from room temperature to 1800 K at both low and high stresses, using a single adjusting parameter, the so-called mechanical resistance σ ˜ . We also propose an alternative mathematical expression based on a sigmoid function, which is more suitable for implementation in geodynamical models. olivine rheology creep dislocation glide dislocation climb Earth mantle numerical modelling Cordier, Patrick verfasserin (orcid)0000-0002-1883-2994 aut Garel, Fanny verfasserin aut Thoraval, Catherine verfasserin aut Demouchy, Sylvie verfasserin aut Tommasi, Andréa verfasserin (orcid)0000-0002-6457-1852 aut Carrez, Philippe verfasserin aut Enthalten in Earth and planetary science letters Amsterdam [u.a.] : Elsevier, 1966 506, Seite 282-291 Online-Ressource (DE-627)266015778 (DE-600)1466659-5 (DE-576)074959980 1385-013X nnns volume:506 pages:282-291 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 38.35 Endogene Geologie: Allgemeines 39.29 Theoretische Astronomie: Sonstiges AR 506 282-291
allfieldsSound	10.1016/j.epsl.2018.10.049 doi (DE-627)ELV001240250 (ELSEVIER)S0012-821X(18)30651-4 DE-627 ger DE-627 rda eng 550 DE-600 38.35 bkl 39.29 bkl Gouriet, Karine verfasserin aut Dislocation dynamics modelling of the power-law breakdown in olivine single crystals: Toward a unified creep law for the upper mantle 2018 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In the present work, we use a numerical modelling approach based on 2.5-dimensional dislocation dynamics simulations to investigate the transition between the power and the exponential laws in olivine for temperatures ranging between 800 K and 1700 K and stresses between 100 and 500 MPa. We model the deformation of an olivine crystal by the interplay of glide and climb of dislocations. Plastic strain is produced by glide, the amount of gliding dislocations being controlled by climb acting as a recovery mechanism. Within this framework, and without the need of introducing any other mechanism, our model reproduces a power law breakdown above 200 MPa. Consequently, we conclude that the use of two rheological laws to describe the creep of olivine can be motivated by convenience, but is not imposed by theoretical needs. Alternatively a unified creep law can be proposed to describe the rheology of olivine in a wide range of temperature relevant for the upper mantle. This flow law may have an exponential form and describe the entire range of experimental data, from room temperature to 1800 K at both low and high stresses, using a single adjusting parameter, the so-called mechanical resistance σ ˜ . We also propose an alternative mathematical expression based on a sigmoid function, which is more suitable for implementation in geodynamical models. olivine rheology creep dislocation glide dislocation climb Earth mantle numerical modelling Cordier, Patrick verfasserin (orcid)0000-0002-1883-2994 aut Garel, Fanny verfasserin aut Thoraval, Catherine verfasserin aut Demouchy, Sylvie verfasserin aut Tommasi, Andréa verfasserin (orcid)0000-0002-6457-1852 aut Carrez, Philippe verfasserin aut Enthalten in Earth and planetary science letters Amsterdam [u.a.] : Elsevier, 1966 506, Seite 282-291 Online-Ressource (DE-627)266015778 (DE-600)1466659-5 (DE-576)074959980 1385-013X nnns volume:506 pages:282-291 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 38.35 Endogene Geologie: Allgemeines 39.29 Theoretische Astronomie: Sonstiges AR 506 282-291
language	English
source	Enthalten in Earth and planetary science letters 506, Seite 282-291 volume:506 pages:282-291
sourceStr	Enthalten in Earth and planetary science letters 506, Seite 282-291 volume:506 pages:282-291
format_phy_str_mv	Article
bklname	Endogene Geologie: Allgemeines Theoretische Astronomie: Sonstiges
institution	findex.gbv.de
topic_facet	olivine rheology creep dislocation glide dislocation climb Earth mantle numerical modelling
dewey-raw	550
isfreeaccess_bool	false
container_title	Earth and planetary science letters
authorswithroles_txt_mv	Gouriet, Karine @@aut@@ Cordier, Patrick @@aut@@ Garel, Fanny @@aut@@ Thoraval, Catherine @@aut@@ Demouchy, Sylvie @@aut@@ Tommasi, Andréa @@aut@@ Carrez, Philippe @@aut@@
publishDateDaySort_date	2018-01-01T00:00:00Z
hierarchy_top_id	266015778
dewey-sort	3550
id	ELV001240250
language_de	englisch
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author	Gouriet, Karine
spellingShingle	Gouriet, Karine ddc 550 bkl 38.35 bkl 39.29 misc olivine rheology misc creep misc dislocation glide misc dislocation climb misc Earth mantle misc numerical modelling Dislocation dynamics modelling of the power-law breakdown in olivine single crystals: Toward a unified creep law for the upper mantle
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topic_title	550 DE-600 38.35 bkl 39.29 bkl Dislocation dynamics modelling of the power-law breakdown in olivine single crystals: Toward a unified creep law for the upper mantle olivine rheology creep dislocation glide dislocation climb Earth mantle numerical modelling
topic	ddc 550 bkl 38.35 bkl 39.29 misc olivine rheology misc creep misc dislocation glide misc dislocation climb misc Earth mantle misc numerical modelling
topic_unstemmed	ddc 550 bkl 38.35 bkl 39.29 misc olivine rheology misc creep misc dislocation glide misc dislocation climb misc Earth mantle misc numerical modelling
topic_browse	ddc 550 bkl 38.35 bkl 39.29 misc olivine rheology misc creep misc dislocation glide misc dislocation climb misc Earth mantle misc numerical modelling
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title	Dislocation dynamics modelling of the power-law breakdown in olivine single crystals: Toward a unified creep law for the upper mantle
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title_full	Dislocation dynamics modelling of the power-law breakdown in olivine single crystals: Toward a unified creep law for the upper mantle
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author_browse	Gouriet, Karine Cordier, Patrick Garel, Fanny Thoraval, Catherine Demouchy, Sylvie Tommasi, Andréa Carrez, Philippe
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title_sort	dislocation dynamics modelling of the power-law breakdown in olivine single crystals: toward a unified creep law for the upper mantle
title_auth	Dislocation dynamics modelling of the power-law breakdown in olivine single crystals: Toward a unified creep law for the upper mantle
abstract	In the present work, we use a numerical modelling approach based on 2.5-dimensional dislocation dynamics simulations to investigate the transition between the power and the exponential laws in olivine for temperatures ranging between 800 K and 1700 K and stresses between 100 and 500 MPa. We model the deformation of an olivine crystal by the interplay of glide and climb of dislocations. Plastic strain is produced by glide, the amount of gliding dislocations being controlled by climb acting as a recovery mechanism. Within this framework, and without the need of introducing any other mechanism, our model reproduces a power law breakdown above 200 MPa. Consequently, we conclude that the use of two rheological laws to describe the creep of olivine can be motivated by convenience, but is not imposed by theoretical needs. Alternatively a unified creep law can be proposed to describe the rheology of olivine in a wide range of temperature relevant for the upper mantle. This flow law may have an exponential form and describe the entire range of experimental data, from room temperature to 1800 K at both low and high stresses, using a single adjusting parameter, the so-called mechanical resistance σ ˜ . We also propose an alternative mathematical expression based on a sigmoid function, which is more suitable for implementation in geodynamical models.
abstractGer	In the present work, we use a numerical modelling approach based on 2.5-dimensional dislocation dynamics simulations to investigate the transition between the power and the exponential laws in olivine for temperatures ranging between 800 K and 1700 K and stresses between 100 and 500 MPa. We model the deformation of an olivine crystal by the interplay of glide and climb of dislocations. Plastic strain is produced by glide, the amount of gliding dislocations being controlled by climb acting as a recovery mechanism. Within this framework, and without the need of introducing any other mechanism, our model reproduces a power law breakdown above 200 MPa. Consequently, we conclude that the use of two rheological laws to describe the creep of olivine can be motivated by convenience, but is not imposed by theoretical needs. Alternatively a unified creep law can be proposed to describe the rheology of olivine in a wide range of temperature relevant for the upper mantle. This flow law may have an exponential form and describe the entire range of experimental data, from room temperature to 1800 K at both low and high stresses, using a single adjusting parameter, the so-called mechanical resistance σ ˜ . We also propose an alternative mathematical expression based on a sigmoid function, which is more suitable for implementation in geodynamical models.
abstract_unstemmed	In the present work, we use a numerical modelling approach based on 2.5-dimensional dislocation dynamics simulations to investigate the transition between the power and the exponential laws in olivine for temperatures ranging between 800 K and 1700 K and stresses between 100 and 500 MPa. We model the deformation of an olivine crystal by the interplay of glide and climb of dislocations. Plastic strain is produced by glide, the amount of gliding dislocations being controlled by climb acting as a recovery mechanism. Within this framework, and without the need of introducing any other mechanism, our model reproduces a power law breakdown above 200 MPa. Consequently, we conclude that the use of two rheological laws to describe the creep of olivine can be motivated by convenience, but is not imposed by theoretical needs. Alternatively a unified creep law can be proposed to describe the rheology of olivine in a wide range of temperature relevant for the upper mantle. This flow law may have an exponential form and describe the entire range of experimental data, from room temperature to 1800 K at both low and high stresses, using a single adjusting parameter, the so-called mechanical resistance σ ˜ . We also propose an alternative mathematical expression based on a sigmoid function, which is more suitable for implementation in geodynamical models.
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title_short	Dislocation dynamics modelling of the power-law breakdown in olivine single crystals: Toward a unified creep law for the upper mantle
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author2	Cordier, Patrick Garel, Fanny Thoraval, Catherine Demouchy, Sylvie Tommasi, Andréa Carrez, Philippe
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up_date	2024-07-06T20:42:07.038Z
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Dislocation dynamics modelling of the power-law breakdown in olivine single crystals: Toward a unified creep law for the upper mantle

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