Combined models

src/pages/models/cenki-2022-uht-granulitic-terranes/assets/.gitkeep

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src/pages/models/cenki-2022-uht-granulitic-terranes/graphics/.gitkeep

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src/pages/models/cenki-2022-uht-granulitic-terranes/index.md

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+---
+templateKey: model
+slug: test-2022-sunda-subduction
+title: 'Subduction dynamics and plate coupling along seismically active margin: the
+  role of slab steps'
+date: '2024-10-24T02:18:49.000Z'
+featuredpost:
+for_codes:
+  - 370401
+status:
+  - completed
+doi: https://doi.org/10.25914/aaen-nc33
+url: https://mate.science//models/gollapalli-2022-sunda-subduction
+creditText: 'Cenki-Tok or Cenki, B., Rey, Patrice F.., Arcay, D., & Giordani, J. (2024).
+  Timing of partial melting and granulite formation during the genesis of high to
+  ultra‐high temperature terranes: Insight from numerical experiments [Data set].
+  AuScope, National Computational Infrastructure. https://doi.org/aaen-nc33'
+software:
+  name: 'Underworld2: Python Geodynamics Modelling for Desktop, HPC and Cloud'
+  doi: https://doi.org/10.5281/zenodo.3975252
+  url_source: ''
+licence:
+  licence_url: https://creativecommons.org/licenses/by/4.0/legalcode
+  licence_image: ../../../img/licence/by.png
+  description: Creative Commons Attribution 4.0 International
+  licence_file: license.txt
+submitter:
+  name: Thyagarajulu
+  family_name: Gollapalli
+  ORCID: https://orcid.org/0000-0001-9394-4104
+creators:
+  - name: Thyagarajulu
+    family_name: Gollapalli
+    ORCID: 0000-0001-9394-4104
+associated_publication:
+  title: Unravelling tectonic coupling and loading along the Sunda margin through
+    3-D regional numerical  modelling
+  doi: https://doi.org/10.26180/21664034.v1
+  date: 2022-12
+  authors:
+    - name: Thyagarajulu
+      family_name: Gollapalli
+compute_info:
+  name: Gadi Supercomputer
+  organisation: National Computational Infrastructure
+  url: https://pid.nci.org.au/doi/f5966_0057_9267_4579
+  doi: https://doi.org/10.25914/608bfd1838db2
+research_tags:
+  - Subduction
+  - Plate boundary
+compute_tags:
+  - Python
+  - Finite element
+  - Particle-in-cell
+funder:
+  name: National Computational Infrastructure
+  doi: https://ror.org/04yx6dh41
+abstract: The negative buoyancy of the slab primarily controls the subducting plate
+  and trench motions, and tectonic stresses around the convergent margins. Lateral
+  variations in negative buoyancy associated with varying slab depth along strike
+  must affect plate and margin motions, and, most importantly, have an impact on the
+  stress acting across the margin, thereby setting the context for plate coupling,
+  tectonics and present-day seismicity. Here, we investigated these interactions in
+  3-D subduction numerical models, focusing on along-trench variations in the subduction
+  depth and the resulting perturbations to the force balance. While we focus on the
+  steps in the slab depth, we additionally test the role of subducting plate, i.e.,
+  cohesion and viscosity, and upper plate properties, i.e., thickness, viscosity,
+  and cohesion. The results show that the magnitude of convergence velocity only depends
+  on the integrated slab mass and rheology of the subducting plate when the upper
+  plate is thin. Instead, the trench retreat/advance is sensitive to the heterogeneity
+  in the slab depth, and a complex pattern arises atop the slab step, with a characteristic
+  length of ~500 km from the slab depth perturbation. The remaining parameters of
+  the subducting and upper plate mainly affect the magnitude of the trench velocities
+  with minor influence on the pattern. The highest deformation/stress in the upper
+  plate is observed around the slab step due to the rigidity of the plate, causing
+  mutual perturbation between the deep and shallow slab portions, and the lateral
+  flow around the step. These results are compared with the observations along the
+  Sunda margin, where similar slab depth variations are found. The upper plate deformation
+  in the model shows remarkable compatibility with the observed distributions of compression
+  and extension of the Andaman- Sumatra-Java segments. Our study indicates that trench-parallel
+  forces, arising from the natural variations of slab depth, exert a first-order control
+  on the plate coupling and deformation along convergent margins and should not be
+  neglected.
+description: The negative buoyancy of the slab drives subducting plate and trench
+  motions, influencing tectonic stresses at convergent margins. Variations in slab
+  depth along the trench affect plate coupling and seismicity. We investigated these
+  effects using 3-D subduction models, focusing on slab depth variations and their
+  impact on force balance. Results show convergence velocity is primarily controlled
+  by slab mass and subducting plate rheology, while trench movement is sensitive to
+  slab depth heterogeneity. The highest stress occurs around slab steps, aligning
+  with deformation patterns observed along the Sunda margin. This study highlights
+  the crucial role of trench-parallel forces in plate dynamics.
+images:
+  landing_image:
+    src: ./graphics/vel_sr_inv_landing_page.png
+    caption: "\nMantle flow and upper plate deformation due to slab step"
+  graphic_abstract:
+    src: ./graphics/sketch.png
+    caption: "\nSketch of the tectonic forces acting at the Sunda margin and interface
+      stress along Andaman (DD’), Sumatra (FF’), and Java (MM’). At the Sumatra margin,
+      an additional transferred force ($F^*_{SP}$) from Java is acting that contributes
+      to crustal thickening/compression in the upper plate. The blue stars represent
+      the interplate earthquakes, and black dots are intraplate seismicity. The sketch
+      neglects the curvature of the trench and the obliquity of convergence."
+  model_setup:
+    src: ./graphics/model_matvar_edit_model_setup.png
+    caption: "\nNumerical model setup. The parameter `d` denotes the depth of the
+      long slab (i.e., 660 km, green plane), and `Δ𝑑` represents step length (i.e.,
+      the difference between the long and short slab). The long and short slabs extend
+      from 0-2000 and 2000-4000 km in the Y-direction. The trench is located at X
+      = 2000 km."
+animation:
+  src: ./graphics/
+  caption: ''
+model_setup_info:
+  url: ''
+  summary: The model setup consists of the subducting plate with attached slab and
+    upper plate inserted in the 660 km upper mantle lying over 340 km lower mantle.
+    The model extends 4000 km in each x, y, and 1000 km in the z-axis with a numerical
+    resolution of 512×512×128, respectively. This resolution results in an element
+    size of 7.8 km in all three directions. Each element is populated with 20 Lagrangian
+    particles to store material properties. All boundaries in the model are under
+    free slip conditions. All models include a 100 km thick subducting plate and slab.
+    The rheology in the top 30 km (crust) is viscoplastic, and the rest (70 km lithospheric
+    mantle) is viscous. Oceanic lithosphere has a density contrast of 50 $kg/m^3$
+    with respect to the underlying sublithospheric mantle. The entire slab has a uniform
+    initial dip angle of 45°. The upper plate consists of crust 30 km thick, and its
+    lithospheric mantle thickness is varied between 20 km, 40 km, and 60 km. The trailing
+    end of the subducting plate is free and upper plate end is fixed. The density
+    contrast between the upper plate and mantle is set to zero. This avoids lithostatic
+    pressure gradients, and the stress distribution in the upper plate is only influenced
+    by the dynamics driven by lateral slab buoyancy variations.  Therefore, the stress
+    distribution in the upper plate can be used as a proxy for tectonic coupling at
+    the interface.
+model_files:
+  url: ''
+  notes: Underworld2 input files of Sunda Subduction Zone (3D cartesian models).
+  file_tree: ''
+  existing_identifier: https://doi.org/10.5281/zenodo.7022845
+  nci_file_path: 
+    https://thredds.nci.org.au/thredds/catalog/nm08/MATE/gollapalli-2022-sunda-subduction/catalog.html
+  include: true
+dataset:
+  url: ''
+  notes: Output data mainly contains *.h5 and *.xdmf files.
+  existing_identifier: ''
+  nci_file_path: 
+    https://thredds.nci.org.au/thredds/catalog/nm08/MATE/gollapalli-2022-sunda-subduction/catalog.html
+  include: true
+metadataFile: ro-crate-metadata.json
+---