New M@TE! model:
we have provided a summary of your model as a starting point for the README, feel free to edit
Model Submitter:
Dan Sandiford (0000-0002-2207-6837)
Model Creator(s):
- Dan Sandiford (0000-0002-2207-6837)
- Sascha Brune (0000-0003-4985-1810)
- Anne Glerum (0000-0002-9481-1749)
- John Naliboff (0000-0002-5697-7203)
- Joanne M. Whittaker (0000-0002-3170-3935)
Model name:
sandiford-2021-detachment
(this will be the name of the model repository when created)
Model long name:
Kinematics of Footwall Exhumation at Oceanic Detachment faults: Solid‐Block Rotation and Apparent Unbending
License:
Creative Commons Attribution 4.0 International
Model Category:
- model published in study
- forward model
Model Status:
Associated Publication title:
Abstract:
Seafloor spreading at slow rates can be accommodated on large‐offset 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—particularly the relative roles of solid‐block rotation and flexure—are not clearly understood. Using a high‐resolution 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‐block rotation, accommodated by the nonplanar, concave‐down fault interface. A consequence is that curvature measured along the ODF is representative of a neutral stress configuration, rather than a “bent” one. Instead, it is in the subsequent process of “apparent unbending” 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‐Atlantic Geotraverse at the Mid‐Atlantic Ridge.
Scientific Keywords:
- tectonics
- faulting
- detachment faults
Funder(s):
- Australian Research Council (https://ror.org/05mmh0f86)
- (https://www.helmholtz.de/)
** No embargo on model contents requested****Include model code:**
True
Model code existing URL/DOI:
https://github.com/dansand/odf_paper
Model code 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:
True
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.
Software Framework DOI/URL:
Found software: geodynamics/aspect: ASPECT 2.5.0
Name of primary software framework:
geodynamics/aspect: ASPECT 2.5.0
Software & algorithm keywords:
- C++
- finite-element
- mesh-refinement
Landing page image:
Caption: Deviatoric stresses and vorticity in reference model.
Animation:
Caption: https://github.com/ModelAtlasofTheEarth/Model_Submission/assets/10967872/1f89632e-53ee-4b34-8eaf-2f8a8ce351a4 Animation for alternative model showing vorticity.
Graphic abstract:
Caption: Schematic showing the stress state that would be generated assuming elastic constitutive response of the ODF footwall (top). Bottom shows the strain-rate due to "advective" component of the curvature rate.
Model setup figure:
Caption:
Initial conditions, showing mesh refinement.
Description: The domain is