m-te-bot[bot]
commented
6 months ago M@TE crate
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The model submission process (for details, see github.com/ModelAtlasofTheEarth/model_submission) generates a comprehensive metadata document, utilising the principles of the RO-Crate project. To ensure long-term storage of large computational model outputs, M@TE models are cloned to servers on the National Computational Infrastructure (more information at geonetwork.nci.org.au). This procedure assigns a citable DOI to each M@TE model. Additionally, models are featured on the project website, https://mate.science. See website for further information.", "abstract": "Seafloor spreading at slow rates can be accommodated on large\u2010offset oceanic detachment faults (ODFs), that exhume lower crustal and mantle rocks in footwall domes termed oceanic core complexes (OCCs). Footwall rocks experience large rotation during exhumation, yet important aspects of the kinematics\u2014particularly the relative roles of solid\u2010block rotation and flexure\u2014are not clearly understood. Using a high\u2010resolution numerical model, we explore the exhumation kinematics in the footwall beneath an emergent ODF/OCC. A key feature of the models is that footwall motion is dominated by solid\u2010block rotation, accommodated by the nonplanar, concave\u2010down fault interface. A consequence is that curvature measured along the ODF is representative of a neutral stress configuration, rather than a \u201cbent\u201d one. Instead, it is in the subsequent process of \u201capparent unbending\u201d that significant flexural stresses are developed in the model footwall. The brittle strain associated with apparent unbending is produced dominantly in extension, beneath the OCC, consistent with earthquake clustering observed in the Trans\u2010Atlantic Geotraverse at the Mid\u2010Atlantic Ridge.", "creator": [{"@type": "Person", "@id": "http://orcid.org/0000-0002-2207-6837", "givenName": "Dan", "familyName": "Sandiford"}, {"@type": "Person", "@id": "http://orcid.org/0000-0003-4985-1810", "givenName": "Sascha", "familyName": "Brune"}, {"@type": "Person", "@id": "http://orcid.org/0000-0002-9481-1749", "givenName": "Anne", "familyName": "Glerum"}, {"@type": "Person", "@id": "http://orcid.org/0000-0002-5697-7203", "givenName": "John", "familyName": "Naliboff"}, {"@type": "Person", "@id": "http://orcid.org/0000-0002-3170-3935", "givenName": "Joanne M.", "familyName": "Whittaker"}], "contributor": "", "citation": {"@type": "ScholarlyArticle", "@id": "http://dx.doi.org/10.1029/2021gc009681", "name": "Kinematics of Footwall Exhumation at Oceanic Detachment faults: Solid\u2010Block Rotation and Apparent Unbending", "author": [{"@type": "Person", "@id": "http://orcid.org/0000-0002-2207-6837", "givenName": "Dan", "familyName": "Sandiford"}, {"@type": "Person", "@id": "http://orcid.org/0000-0003-4985-1810", "givenName": "Sascha", "familyName": "Brune"}, {"@type": "Person", "@id": "http://orcid.org/0000-0002-9481-1749", "givenName": "Anne", "familyName": "Glerum"}, {"@type": "Person", "@id": "http://orcid.org/0000-0002-5697-7203", "givenName": "John", "familyName": "Naliboff"}, {"@type": "Person", "@id": "http://orcid.org/0000-0002-3170-3935", "givenName": "Joanne M.", "familyName": "Whittaker"}], "abstract": "Seafloor spreading at slow rates can be accommodated on large\u2010offset oceanic detachment faults (ODFs), that exhume lower crustal and mantle rocks in footwall domes termed oceanic core complexes (OCCs). Footwall rocks experience large rotation during exhumation, yet important aspects of the kinematics\u2014particularly the relative roles of solid\u2010block rotation and flexure\u2014are not clearly understood. Using a high\u2010resolution numerical model, we explore the exhumation kinematics in the footwall beneath an emergent ODF/OCC. A key feature of the models is that footwall motion is dominated by solid\u2010block rotation, accommodated by the nonplanar, concave\u2010down fault interface. A consequence is that curvature measured along the ODF is representative of a neutral stress configuration, rather than a \u201cbent\u201d one. Instead, it is in the subsequent process of \u201capparent unbending\u201d that significant flexural stresses are developed in the model footwall. 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-> submitter ORCID (or name)
0000-0002-2207-6837
-> slug
sandiford-2021-detachment
-> license
CC-BY-4.0
-> model category
model published in study, forward model
-> associated publication DOI
http://dx.doi.org/10.1029/2021gc009681
-> model creators
-> model contributors
No response
-> title
No response
-> description
This model was developed in order to study the rotation of footwall rocks beneath oceanic detachment faults (ODFs). It showed that solid-block rotation dominates beneath a concave-down fault, while significant flexural stresses form later during "apparent unbending," causing both compression and extension-related brittle strain within oceanic core complexes (OCCs).
-> abstract
No response
-> scientific keywords
tectonics, faulting, detachment faults
-> funder
https://ror.org/05mmh0f86, DP180102280 https://www.helmholtz.de/, VH-NG-1132
-> include model code ?
-> model code/inputs DOI
https://github.com/dansand/odf_paper
-> model code/inputs notes
ASPECT Input files for model. Input file has been updated for compatibility with more recent ASPECT versions. Input file tested on ASPECT version 2.6.0-pre (fix_stresses_elasticity, 621dd61f2), using deal.II 9.4.2.
-> include model output data?
-> data creators
0000-0002-2207-6837
-> model output data DOI
No response
-> model output data notes
Data directory contains output data for 2 simulations stored in the following directories: ref_model_hires, alt_model_hires. Top level contains typical ASPECT output files, including log.txt and restart files. Topography and mesh variables were output at 100 Kyr intervals. Model end time is 5 Myr. Main output data consists of of plain text files representing model topography (e.g. topography.00000), vtu files (in the ./solution sub-directory) representing model output fields (e.g. solution-00000.0000.vtu). At each output step, there are 16 vtu files written. These can be opened with Paraview using the solution.pvd file in the top level.
-> model output data size
Model output data total about 11Gb
-> software framework DOI/URI
https://doi.org/10.5281/zenodo.8200213
-> software framework source repository
No response
-> name of primary software framework (e.g. Underworld, ASPECT, Badlands, OpenFOAM)
No response
-> software framework authors
No response
-> software & algorithm keywords
C++, finite-element, mesh-refinement
-> computer URI/DOI
https://dx.doi.org/10.25914/608bfd1838db2
-> add landing page image and caption
-> add an animation (if relevant)
https://github.com/ModelAtlasofTheEarth/Model_Submission/assets/10967872/1f89632e-53ee-4b34-8eaf-2f8a8ce351a4 Animation for alternative model showing vorticity.
-> add a graphic abstract figure (if relevant)
-> add a model setup figure (if relevant)
-> 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.