-> name of primary software framework (e.g. Underworld, ASPECT, Badlands, OpenFOAM)
No response
-> software framework authors
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-> software & algorithm keywords
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-> computer URI/DOI
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-> add landing page image and caption
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-> add an animation (if relevant)
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-> add a graphic abstract figure (if relevant)
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-> add a model setup figure (if relevant)
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-> add a description of your model setup
The domain is $400 \; \mathrm{km}$ wide and $100 \; \mathrm{km}$ deep, and includes five levels of mesh refinement, as shown in the figure. The model is initialised with a symmetric temperature structure, defined by a transient 1-D cooling profile, with an age of $0.5 \; \mathrm{Myr}$ in the center of the domain. The thermal profile ages outwardly in proportion to the applied spreading rate of $2 \; \mathrm{cm\,{yr}^{-1}}$ (full rate), which is representative for slow spreading ridges. Uniform inflow at the bottom boundary balances the outward flux of material at the side boundaries. The model has a true free surface, and a diffusion process is applied to the surface topography in order to counteract strong mesh deformation. A simplification here is that the effect of the water column is ignored, i.e. the detachment system is modeled as sub-aerial. There is no compositional differentiation in the model (i.e. no crust/mantle) and all parts of the domain are subject to the same constitutive model. The constitutive model incorporates viscous (dislocation creep), elastic and plastic (pseudo-brittle) deformation mechanisms, hereafter referred to as visco-elastic plastic (VEP) rheology, following the approach of Moresi et al. (2003). The advection-diffusion equation included an anomalously- high diffusivity $(3 \times {10}^{-6} \; \mathrm{m^2 \, s^{-1}})$ which is intended to model the near axis cooling effect of hydrothermal circulation (cf. Lavier and Buck, 2002). As implemented here, the higher diffusivity applies throughout the domain, rather than being localized at the ridge (as in Lavier and Buck, 2002). The parameters chosen here result in $\sim 10 \; \mathrm{km}$ lithosphere at the ridge axis, which is in the range identified for ODF development. Due to the difference in diffusivity values in the initial conditions $({10}^{-6} \; \mathrm{m^2 \, s^{-1}})$, and temperature evolution equation $(3 \times {10}^{-6})$, the thermal structure is not in steady state and some cooling of the off-axis lithosphere occurs.
-> creator/contributor ORCID (or name)
0000-0002-2207-6837
-> slug
sandiford_2021_detachment
-> field of Research (FoR) Codes
3706034
-> license
CC-BY-4.0
-> model category
model published in study
-> associated publication DOI
https://www.doi.org/10.1029/2021gc009681
-> title
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-> description
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-> model authors
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-> scientific keywords
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-> funder
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-> include model code ?
-> model code URI/DOI
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-> include model output data?
-> model output URI/DOI
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-> software framework DOI/URI
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-> software framework source repository
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-> name of primary software framework (e.g. Underworld, ASPECT, Badlands, OpenFOAM)
No response
-> software framework authors
No response
-> software & algorithm keywords
No response
-> computer URI/DOI
No response
-> add landing page image and caption
No response
-> add an animation (if relevant)
No response
-> add a graphic abstract figure (if relevant)
No response
-> add a model setup figure (if relevant)
No response
-> add a description of your model setup
The domain is $400 \; \mathrm{km}$ wide and $100 \; \mathrm{km}$ deep, and includes five levels of mesh refinement, as shown in the figure. The model is initialised with a symmetric temperature structure, defined by a transient 1-D cooling profile, with an age of $0.5 \; \mathrm{Myr}$ in the center of the domain. The thermal profile ages outwardly in proportion to the applied spreading rate of $2 \; \mathrm{cm\,{yr}^{-1}}$ (full rate), which is representative for slow spreading ridges. Uniform inflow at the bottom boundary balances the outward flux of material at the side boundaries. The model has a true free surface, and a diffusion process is applied to the surface topography in order to counteract strong mesh deformation. A simplification here is that the effect of the water column is ignored, i.e. the detachment system is modeled as sub-aerial. There is no compositional differentiation in the model (i.e. no crust/mantle) and all parts of the domain are subject to the same constitutive model. The constitutive model incorporates viscous (dislocation creep), elastic and plastic (pseudo-brittle) deformation mechanisms, hereafter referred to as visco-elastic plastic (VEP) rheology, following the approach of Moresi et al. (2003). The advection-diffusion equation included an anomalously- high diffusivity $(3 \times {10}^{-6} \; \mathrm{m^2 \, s^{-1}})$ which is intended to model the near axis cooling effect of hydrothermal circulation (cf. Lavier and Buck, 2002). As implemented here, the higher diffusivity applies throughout the domain, rather than being localized at the ridge (as in Lavier and Buck, 2002). The parameters chosen here result in $\sim 10 \; \mathrm{km}$ lithosphere at the ridge axis, which is in the range identified for ODF development. Due to the difference in diffusivity values in the initial conditions $({10}^{-6} \; \mathrm{m^2 \, s^{-1}})$, and temperature evolution equation $(3 \times {10}^{-6})$, the thermal structure is not in steady state and some cooling of the off-axis lithosphere occurs.