Thermomechanical models of the Australian plate

<div><strong>Output Type: </strong>Exploring for the Future Extended Abstract</div><div><br></div><div><strong>Short Abstract: </strong>The thickness and thermal structure of continental lithosphere influences the location of seismic and volcanic hazards and is important for predicting long-term evolution of landscapes, sedimentary basins, and the distribution of natural resources. In this project, we have developed new, continental-scale models of the thermomechanical structure of the Australian plate. We begin by compiling an inventory of >15,000 geochemical analyses of peridotitic xenoliths and xenocrysts from across the continent that have been carried up to the surface in volcanic eruptions. We apply thermobarometric techniques to constrain their pressure and temperature of equilibration and perform steady-state heat flow modelling to assess the paleogeotherm beneath these sites. We subsequently use the paleogeotherms as constraints in a Bayesian calibration of anelasticity at seismic frequencies to provide a mapping between seismic velocity and temperature as a function of pressure. We apply this method to several regional-scale seismic tomography models, allowing the temperature to be continuously mapped throughout the Australian lithospheric and asthenospheric mantle. Our models include assessment of uncertainties and can be used to query thermomechanical properties, such as lithospheric thickness, heat flow through the Moho, and the Curie depth.</div><div><br></div><div><strong>Citation: </strong>Hoggard, M.J., Hazzard, J., Sudholz, Z., Richards, F., Duvernay, T., Austermann, J., Jaques, A.L., Yaxley, G., Czarnota, K. & Haynes, M., 2024. Thermochemical models of the Australian plate. In: Czarnota, K. (ed.) Exploring for the Future: Extended Abstracts, Geoscience Australia, Canberra. https://doi.org/10.26186/149411</div>

Simple

Identification info

Date (Creation)
2024-05-22T02:00:00
Date (Publication)
2024-08-11T22:56:48
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/149411

Citation identifier
Digital Object Identifier/https://dx.doi.org/10.26186/149411

Cited responsible party
Role Organisation / Individual Name Details
Publisher

Commonwealth of Australia (Geoscience Australia)

 Voice
Author

Hoggard, M.J.

 External Contact
Author

Hazzard, J.

 External Contact
Author

Sudholz, Z.

 External Contact
Author

Richards, F.

 External Contact
Author

Duvernay, T.

 External Contact
Author

Austermann, J.

 External Contact
Author

Jaques, A.L.

 External Contact
Author

Yaxley, G.

 External Contact
Author

Czarnota, K.

 Internal Contact
Author

Haynes, M.

 Internal Contact
Editor

Czarnota, K.

 Internal Contact
Name

Exploring for the Future Extended Abstracts

Purpose

An Exploring for the Future Extended Abstract modelling the thickness of the Australian lithospheric mantle.

Status
Completed
Point of contact
Role Organisation / Individual Name Details
Resource provider

Minerals, Energy and Groundwater Division

 External Contact
Point of contact

Commonwealth of Australia (Geoscience Australia)

 Voice
Point of contact

Haynes, M.

 Internal Contact
Spatial representation type
Topic category
  • Geoscientific information

Extent

N
S
E
W


Maintenance and update frequency
Not planned

Resource format

Title

Product data repository: Various Formats

Website

Data Store directory containing the digital product files

Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes

Project

  • EFTF – Exploring for the Future

Project

  • Australia’s Resources Framework

Project

  • Lithospheric Geophysics

Keywords

  • LAB

Keywords

  • Lithosphere-Asthenosphere Boundary

Keywords

  • Geotherm

Keywords

  • Xenoliths

Keywords

  • Xenocrysts

Keywords

  • Geothermobarometry

Keywords

  • Seismic tomography

Keywords

  • Anelasticity

Keywords

  • Bayesian inversion

Keywords

  • Heat flow

theme.ANZRC Fields of Research.rdf

  • Geothermics and radiometrics

  • Geology

  • Seismology and seismic exploration

Keywords

  • Published_External

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

Edition

4.0

Website

https://creativecommons.org/licenses/by/4.0/

Addressee
Role Organisation / Individual Name Details
User

Any
Use constraints
License
Use constraints
Other restrictions
Other constraints

© Commonwealth of Australia (Geoscience Australia) 2024

Resource constraints

Title

Australian Government Security Classification System

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified
Classification system

Australian Government Security Classification System

Associated resource

Association Type
Informed
Title

Xenolith Constraints on Lithospheric Architecture and Mantle Geochemistry of Australia

Citation identifier
149242

Citation identifier
889bbc35-e78d-4950-ab44-05d7a4af6a3c

Website

http://pid.geoscience.gov.au/dataset/ga/149242

Link to eCat metadata record landing page

Associated resource

Association Type
Informed
Title

Mapping the Structure and Metasomatic Enrichment of the Lithospheric Mantle Beneath the Kimberley Craton, Western Australia

Citation identifier
147708

Citation identifier
83635c59-9cd4-4383-948e-ea3df023000a

Website

http://pid.geoscience.gov.au/dataset/ga/147708

Link to eCat metadata record landing page

Associated resource

Association Type
Informed
Title

Petrology, age, and rift origin of ultramafic lamprophyres (aillikites) at Mount Webb, a new alkaline province in central Australia

Citation identifier
147707

Citation identifier
fa053e42-ed31-4547-8840-51536d388a5c

Website

http://pid.geoscience.gov.au/dataset/ga/147707

Link to eCat metadata record landing page

Associated resource

Association Type
Informed
Title

Minerals on the edge: Sediment-hosted base metal endowment above steps in lithospheric thickness

Citation identifier
134991

Citation identifier
b0d2a825-8326-4d22-9c18-69f57086dcf5

Website

http://pid.geoscience.gov.au/dataset/ga/134991

Link to eCat metadata record landing page

Associated resource

Association Type
Informed
Title

Global distribution of sediment-hosted metals controlled by craton edge stability

Citation identifier
132624

Citation identifier
20dfc1aa-ca9b-425d-baad-e7437f231976

Website

http://pid.geoscience.gov.au/dataset/ga/132624

Link to eCat metadata record landing page

Language
English
Character encoding
UTF8

Distribution Information

Distributor contact
Role Organisation / Individual Name Details
Distributor

Commonwealth of Australia (Geoscience Australia)

 Voice facsimile
OnLine resource

Extended Abstract for download (pdf) [3.5 MB]

Extended Abstract for download (pdf) [3.5 MB]

Distribution format

  • pdf

    File decompression technique

    nil

OnLine resource

Download supplementary data file (zip) [133.7 MB]

Download supplementary data file (zip) [133.7 MB]

Distribution format

  • zip

    File decompression technique

    unzip

Resource lineage

Statement

<div>A dataset of xenolith and xenocryst occurrences&nbsp;are compiled using digitising data from academic literature supplemented by new analyses performed at the Centre for Advanced Microscopy, Australian National University (Suholz et al., 2024). The petrology and geochemistry of these samples is used to constrain the local temperature structure and architecture of the Australian lithosphere. Paleogeotherm modelling has been performed at each of these sites using FITPLOT (Mather et al. 2011), and the results are used to calibrate a conversion of seismic tomography to temperature. This conversion is then applied to the tomographic models of Fishwick & Rawlinson (2012) and de Laat et al. (2023) to produce thermomechanical models of the Australian plate.</div>

Metadata constraints

Title

Australian Government Security Classification System

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/a7897451-a2ab-4801-b882-0f2a6136e610

Title

GeoNetwork UUID

Language
English
Character encoding
UTF8
Contact
Role Organisation / Individual Name Details
Point of contact

Commonwealth of Australia (Geoscience Australia)

 Voice
Point of contact

Haynes, M.

 Internal Contact

Type of resource

Resource scope
Document
Name

GA Abstract / Fact Sheet

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/149411

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/a7897451-a2ab-4801-b882-0f2a6136e610

Metadata linkage

https://ecat.ga.gov.au/geonetwork/js/eng/catalog.search#/metadata/a7897451-a2ab-4801-b882-0f2a6136e610

Date info (Creation)
2024-08-06T23:25:46
Date info (Revision)
2024-08-06T23:25:46

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition

Version 2.0, September 2018

Citation identifier
http://pid.geoscience.gov.au/dataset/ga/122551

 
 

Spatial extent

N
S
E
W


Keywords

Australia’s Resources Framework EFTF – Exploring for the Future Lithospheric Geophysics
theme.ANZRC Fields of Research.rdf
Geology Geothermics and radiometrics Seismology and seismic exploration

Provided by

Access to the portal

Associated resources

Not available