Thermo-chemical inversion of the Australian lithospheric mantle (KY22)
<div>Lithospheric structure and composition have direct relevance for our understanding of mineral prospectivity. Aspects of the lithosphere can be imaged using geophysical inversion or analysed from exhumed samples at the surface of the Earth, but it is a challenge to ensure consistency between competing models and datasets. The LitMod platform provides a probabilistic inversion framework that uses geology as the fabric to unify multiple geophysical techniques and incorporates a priori geochemical information. Here, we present results from the application of LitMod to the Australian continent. The rasters summarise the results and performance of a Markov-chain Monte Carlo sampling from the posterior model space. Release KY22 is developed using the primary-mode Rayleigh phase velocity grids of Yoshizawa (2014).</div><div><br></div><div>Geoscience Australia's Exploring for the Future program provides precompetitive information to inform decision-making by government, community and industry on the sustainable development of Australia's mineral, energy and groundwater resources. By gathering, analysing and interpreting new and existing precompetitive geoscience data and knowledge, we are building a national picture of Australia's geology and resource potential. This leads to a strong economy, resilient society and sustainable environment for the benefit of all Australians. This includes supporting Australia's transition to a low emissions economy, strong resources and agriculture sectors, and economic opportunities and social benefits for Australia's regional and remote communities. The Exploring for the Future program, which commenced in 2016, is an eight year, $225m investment by the Australian Government.</div>
Simple
Identification info
- Date (Creation)
- 2022-10-09
- Date (Publication)
- 2023-10-19T23:00:06
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/147315
- Citation identifier
- Digital Object Identifier/https://dx.doi.org/10.26186/147315
- Cited responsible party
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Role Organisation / Individual Name Details Publisher Commonwealth of Australia (Geoscience Australia)
Voice Author Haynes, M.
Internal Contact Author Afonso, J.C.
External Contact
- Purpose
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A web service of raster datasets covering the Australian continent. The rasters summarise the results and performance of a Markov-chain Monte Carlo sampling from the posterior model space. Release KY22 is developed using the primary-mode Rayleigh phase velocity grids of Yoshizawa (2014; "Radially anisotropic 3-D shear wave structure of the Australian lithosphere and asthenosphere from multi-mode surface waves").
- Status
- Completed
- Point of contact
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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
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- Geoscientific information
Extent
))
- Maintenance and update frequency
- Not planned
Resource format
- Title
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Product data repository: Various Formats
- Website
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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
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EFTF – Exploring for the Future
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- Project
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Lithospheric Geophysics
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- Project
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LitMod
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- Project
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Australia's Resources Framework
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- Keywords
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Lithospheric mantle
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- Keywords
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Markov-chain Monte Carlo
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- Keywords
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Bayesian
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- Keywords
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Peroditite
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- Keywords
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Joint inversion
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- theme.ANZRC Fields of Research.rdf
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Inorganic geochemistry
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Igneous and metamorphic petrology
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Structural geology and tectonics
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Geothermics and radiometrics
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Seismology and seismic exploration
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- Keywords
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Published_External
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Resource constraints
- Title
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Creative Commons Attribution 4.0 International Licence
- Alternate title
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CC-BY
- Edition
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4.0
- Addressee
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Role Organisation / Individual Name Details User Any
- Use constraints
- License
- Use constraints
- Other restrictions
- Other constraints
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© Commonwealth of Australia (Geoscience Australia) 2023
Resource constraints
- Title
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Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Classification system
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Australian Government Security Classification System
Associated resource
- Association Type
- Operated on by
- Title
-
Lithospheric Mantle WMS
- Citation identifier
- 149295
- Citation identifier
- e506a5a7-78f3-4735-8dc1-7e074305ce91
Associated resource
- Association Type
- Operated on by
- Title
-
Lithospheric Mantle WMTS
- Citation identifier
- 149296
- Citation identifier
- f4e24184-2898-451f-a0f3-0865bca58da4
Associated resource
- Association Type
- Operated on by
- Title
-
Lithospheric Mantle WCS
- Citation identifier
- 149297
- Citation identifier
- 8f434f53-8b93-4437-8d02-f4bd06cccd99
Associated resource
- Association Type
- Operated on by
- Title
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Lithospheric Mantle WFS
- Citation identifier
- 149298
- Citation identifier
- 2fc4be28-3e60-4d83-9627-9e38565ad933
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice facsimile
- OnLine resource
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Download the data (mpk) [535.7 KB]
Download the data (mpk) [535.7 KB]
- Distribution format
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mpk
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- OnLine resource
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Download the data (geotiff) [418.6 KB]
Download the data (geotiff) [418.6 KB]
- Distribution format
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zip
- File decompression technique
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unzip
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- OnLine resource
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Lithospheric Mantle WFS
Lithospheric Mantle WFS
- Distribution format
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OGC:WFS
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- OnLine resource
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Lithospheric Mantle WCS
Lithospheric Mantle WCS
- Distribution format
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OGC:WCS
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- OnLine resource
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Lithospheric Mantle WMTS
Lithospheric Mantle WMTS
- Distribution format
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OGC:WMTS
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- OnLine resource
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Lithospheric Mantle WMS
Lithospheric Mantle WMS
- Distribution format
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OGC:WMS
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Resource lineage
- Statement
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<div>The inversion is based on Markov chain Monte Carlo sampling of major oxide compositions within the lithospheric mantle (Al2O3, CaO, FeO, and MgO). Coupled with temperature and pressure profiles, Gibbs free-energy minimisation (e.g. Connolly, 2009) allows estimation of the dominant mineral phases and, subsequently, the forward physical response. The LitMod inversion platform was used to perform a joint inversion of the following observed data: elevation (Whiteway, 2009), Rayleigh-wave phase velocities (Yoshizawa, 2014), surface heat flow (International Heat Flow Commission, 2021), and long-wavelength geoid anomalies (Afonso et al., 2019). The parameterisation consists of 1D vertical columns across the Australian continent, with 1° lateral grid. The crust was divided into three layers: sediments, upper crust and lower crust. As a starting model, the thicknesses of sedimentary sequences were estimated using the Phanerozoic OZ SEEBASE dataset (Frogtech, 2005), and crustal thicknesses were taken from AusMoho2012 (Salmon et al., 2013). Similarly, the lower crust was assumed to comprise half the total crustal thickness, to a maximum of 15 km. Seismic wave speeds and density within the crust were initially set from AuSREM (Salmon et al., 2012). To help ensure that deep mantle structures are not mapped into the lithospheric mantle, we use the GyPSuM reference model (Simmons et al., 2010) to assign lower mantle seismic wave speed and density profiles.</div>
Reference System Information
- Reference system identifier
- EPSG/WGS 84 / geographic 2D (EPSG: 4326)
Metadata constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/1f32f30e-96a0-40ee-a15d-aa7be49350a2
- Title
-
GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
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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
- Dataset
Alternative metadata reference
- Title
-
Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/147315
- Date info (Creation)
- 2023-06-19T06:08:57
- Date info (Revision)
- 2023-06-19T06:08:57
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3
- Title
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
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Version 2.0, September 2018
- Citation identifier
- http://pid.geoscience.gov.au/dataset/ga/122551