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on the formation of the Himalayas", "identifier": {"@type": "PropertyValue", "propertyID": "doi", "value": "10.5194/egusphere-egu2020-904"}}]}}], "proposed_slug": "Jie-2025-granulites", "slug": "Jie-2025-granulites", "for_codes": {"@id": "https://linked.data.gov.au/def/anzsrc-for/2020/370401", "@type": "DefinedTerm", "name": "Computational modelling and simulation in earth sciences", "termCode": "370401"}, "license": {"@type": "CreativeWork", "@id": "https://creativecommons.org/licenses/by/4.0/legalcode", "description": "Creative Commons Attribution 4.0 International", "website_path": "../../../img/licence/by.png", "url": " https://creativecommons.org/licenses/by/4.0/legalcode.txt", "name": "CC-BY-4.0"}, "model_category": ["model published in study"], "model_status": ["completed"], "title": "Rift foundering and the generation of non-orogenic granulites during the Mesoproterozoic", "abstract": "Mesoproterozoic orogens are unusual in that they commonly preserve a record of high geothermal gradients, low crustal thickness, and limited topography. One such terrane is the Fraser Zone in the Albany\u2013Fraser Orogen (AFO), Western Australia, where granulite-facies rocks record a counterclockwise pressure\u2013temperature (CCW $P\u2013T$) evolution, the drivers of which remain the subject of debate. To understand how the Fraser Zone reached high temperatures followed by burial, a new geochronological and petrological dataset from a metamorphosed gabbronorite was collected. This data places direct temporal constraints on the up-pressure section of the CCW $P\u2013T$ evolution. The gabbronorite preserves an original cumulate texture that crystallised at $\\sim 6\\ \\text{kbar}$ and $\\sim 810^{\\circ}\\text{C}$ that partially recrystallised at conditions of $\\sim 9.5\\ \\text{kbar}$ and $850{-}950^{\\circ}\\text{C}$, as constrained by conventional thermobarometers and pseudosection modelling. Zircon grains with distinct textural and geochemical characteristics constrain the timing of emplacement, melt crystallisation at $1288 \\pm 7\\ \\text{Ma}$, and subsequent up-pressure recrystallisation at $1284 \\pm 7\\ \\text{Ma}$. These combined $P\u2013T$ and geochronological constraints define a rapid burial path to $\\sim 12\\ \\text{km}$ within $c.\\ 4\\ \\text{Myr}$ of initial crystallisation, requiring a re-evaluation of the previous models involving collision and thickening as the timing of the up-pressure excursion pre-dates the established timing of collision between the Western Australian and South Australian Cratons. Thermomechanical geodynamic modelling elucidates a viable tectonic setting for the generation of the granulites of the Fraser Zone, involving rift foundering triggered by asymmetric extension in the backarc that was terminated by subsequent arc advance. Globally, a similar mechanism may have resulted in the ubiquitous high thermobaric ratio metamorphism, low crustal thickness, and limited elevation, associated with the Mesoproterozoic metamorphic record associated with the assembly of Rodinia.", "description": "This model was developed to test the generation of non-orogenic granulites due to rifting. We implemented a melt generation and emplacement model and compared with analytical results obtained from the Fraser zone, SW WA.", "scientific_keywords": ["granulites", "melt", "emplacement"], "funder": [{"@type": "Organization", "@id": "https://ror.org/05mmh0f86", "name": "ARC", "url": "http://www.arc.gov.au/", "additionalType": ["funder", "government"]}], "funding": [{"@type": "Grant", "funder": {"@type": "Organization", "@id": "https://ror.org/05mmh0f86", "name": "ARC", "url": "http://www.arc.gov.au/", "additionalType": ["funder", "government"]}, "identifier": "FT220100566"}], "embargo": [false, "1-01-01"], "include_model_code": true, "model_code_inputs": {"doi": "", "notes": "Model is setup with a python script\nModels require underworld2 to be run"}, "include_model_output": true, "model_output_data": {"creators": [{"@context": "http://schema.org", "@type": "Person", "@id": "https://orcid.org/0000-0001-7919-2575", "mainEntityOfPage": "https://orcid.org/0000-0001-7919-2575", "name": "Ben Steven Knight", "givenName": "Ben Steven", "familyName": "Knight", "affiliation": {"@type": "Organization", "name": "Curtin University", "alternateName": "School of Earth and Planetary Sciences", "identifier": {"@type": "PropertyValue", "propertyID": "ROR", "value": "https://ror.org/02n415q13"}}, "@reverse": {"creator": [{"@type": "CreativeWork", "@id": "https://doi.org/10.1016/j.epsl.2025.119681", "name": "Rift foundering and the generation of non-orogenic granulites during the Mesoproterozoic", "identifier": {"@type": "PropertyValue", "propertyID": "doi", "value": "10.1016/j.epsl.2025.119681"}}, {"@type": "CreativeWork", "@id": "https://doi.org/10.21105/joss.07831", "name": "Underworld3: Mathematically Self-Describing Modelling in Python for Desktop, HPC and Cloud", "identifier": {"@type": "PropertyValue", "propertyID": "doi", "value": "10.21105/joss.07831"}}, {"@type": "CreativeWork", "@id": "https://doi.org/10.1029/2024tc008509", "name": "Slowing Convergence Controls on Orogeny: A Three\u2010Stage Evolution of the Cenozoic India\u2010Asia Collision", "identifier": {"@type": "PropertyValue", "propertyID": "doi", "value": "10.1029/2024tc008509"}}, {"@type": "CreativeWork", "@id": "https://doi.org/10.1130/g52442.1", "name": "Ultraslow cooling of an ultrahot orogen", "identifier": {"@type": "PropertyValue", "propertyID": "doi", "value": "10.1130/g52442.1"}}, {"@type": "CreativeWork", "@id": "https://doi.org/10.22541/essoar.170000347.73900494/v1", "name": "India-Asia slowing convergence rate controls on the Cenozoic Himalaya-Tibetan tectonics", "identifier": {"@type": "PropertyValue", "propertyID": "doi", "value": "10.22541/essoar.170000347.73900494/v1"}}, {"@type": "CreativeWork", "@id": "https://doi.org/10.26180/17193014.v1", "name": "Deciphering the structural evolution of orogens through numerical modelling", "identifier": {"@type": "PropertyValue", "propertyID": "doi", "value": "10.26180/17193014.v1"}}, {"@type": "CreativeWork", "@id": "https://doi.org/10.1029/2020tc006570", "name": "Convergence Velocity Controls on the Structural Evolution of Orogens", "identifier": {"@type": "PropertyValue", "propertyID": "doi", "value": "10.1029/2020tc006570"}}, {"@type": "CreativeWork", "@id": "https://doi.org/10.1093/gji/ggaa410", "name": "Timescales of successful and failed subduction: insights from numerical modelling", "identifier": {"@type": "PropertyValue", "propertyID": "doi", "value": "10.1093/gji/ggaa410"}}, {"@type": "CreativeWork", "@id": "https://doi.org/10.5194/egusphere-egu2020-904", "name": "Reconciling plate convergence and orogeny: The influence of India-Asia convergence rate on the formation of the Himalayas", "identifier": {"@type": "PropertyValue", "propertyID": "doi", "value": "10.5194/egusphere-egu2020-904"}}]}}], "doi": "", "notes": "output is primarily h5 files, with 139 timesteps saved. ~8.18 GB of data.", "size": 8}, "computer_resource": {}, "landing_image": {"filename": "graphics/Model_evolution.pdf", "url": "https://github.com/user-attachments/files/23468159/Model_evolution.pdf", "caption": " Evolution of model at selected timesteps, showing the melt generation and emplacement."}, "animation": {"filename": "graphics/animation", "url": "https://github.com/user-attachments/assets/ab1c6548-fab2-42ad-bd5c-b0d78f670bb7", "caption": " Model evolution showing the generation and emplacement of melt during rifting."}, "graphic_abstract": {"filename": null, "url": ""}, "model_setup_figure": {"filename": "graphics/Model_setup.pdf", "url": "https://github.com/user-attachments/files/23468175/Model_setup.pdf", "caption": " Model setup, showing the initial geotherm and material distribution."}, "model_setup_description": "The 2D model is designed to simulate extension and the emplacement of melt in the crust. The model has a length (x) of 660 km and a height (y) of 140 km. The grid is uniformly spaced at 330 x 70 nodes, producing a grid resolution of 2 km, with 30 particles per cell to track material properties. The model is layered, with a 20 km thick upper crust and 20 km thick lower crust, 80 km thick lithospheric mantle and 10 km thick asthenosphere. A Gaussian plastic strain distribution is initially prescribed across the crust and lithospheric mantle localises deformation and promotes the thinning of the crust during extension. A constant temperature (T = 20 \u00b0C) is applied to the top boundary, with no heat flux across the side walls. A Moho temperature of 700 \u00b0C is prescribed at a depth of 40 km, which results in a geotherm 17 \u00b0C/km across the crust. The lithosphere-asthenosphere temperature is 1375 \u00b0C at a depth of 120 km, which is a geothermal gradient of 8.4375 \u00b0C/km across the lithosphere. In the asthenosphere, a 0.4 \u00b0C/km adiabatic gradient is prescribed, resulting in a temperature of 1380 \u00b0C at the bottom of the domain."} | ||
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The site’s models listing/query is based on
allMarkdownRemarkfiltered bytemplateKey: "model"(seesrc/pages/models/index.js). This directory addsindex.jsonbut noindex.md, so this model page will not be picked up by Gatsby and won’t appear in the models list. Add anindex.md(matching the frontmatter structure used by other model directories) or update the site data sourcing to include JSON (and adjust queries/components accordingly).