Product catalogue
Mapping the Structure and Metasomatic Enrichment of the Lithospheric Mantle Beneath the Kimberley Craton, Western Australia
<div>The lithology, geochemistry, and architecture of the continental lithospheric mantle (CLM) underlying the Kimberley Craton of north-western Australia has been constrained using pressure-temperature estimates and mineral compositions for >5,000 newly analyzed and published garnet and chrome (Cr) diopside mantle xenocrysts from 25 kimberlites and lamproites of Mesoproterozoic to Miocene age. Single-grain Cr diopside paleogeotherms define lithospheric thicknesses of 200–250 km and fall along conductive geotherms corresponding to a surface heat flow of 37–40 mW/m 2. Similar geotherms derived from Miocene and Mesoproterozoic intrusions indicate that the lithospheric architecture and thermal state of the CLM has remained stable since at least 1,000 Ma. The chemistry of xenocrysts defines a layered lithosphere with lithological and geochemical domains in the shallow (<100 km) and deep (>150 km) CLM, separated by a diopside-depleted and seismically slow mid-lithosphere discontinuity (100–150 km). The shallow CLM is comprised of Cr diopsides derived from depleted garnet-poor and spinel-bearing lherzolite that has been weakly metasomatized. This layer may represent an early (Meso to Neoarchean?) nucleus of the craton. The deep CLM is comprised of high Cr2O3 garnet lherzolite with lesser harzburgite, and eclogite. The peridotite components are inferred to have formed as residues of polybaric partial mantle melting in the Archean, whereas eclogite likely represents former oceanic crust accreted during Paleoproterozoic subduction. This deep CLM was metasomatized by H2O-rich melts derived from subducted sediments and high-temperature FeO-TiO2 melts from the asthenosphere.</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 net zero emissions, strong, sustainable 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><div><br></div><div><strong>Citation:</strong></div><div>Sudholz, Z.J., et al. (2023) Mapping the Structure and Metasomatic Enrichment of the Lithospheric Mantle Beneath the Kimberley Craton, Western Australia, <em><i>Geochemistry, Geophysics, Geosystems</i>,</em> 24, e2023GC011040.</div><div> https://doi.org/10.1029/2023GC011040</div>
Simple
Identification info
- Date (Creation)
- 2023-04-04T06:00:00
- Date (Publication)
- 2023-10-19T01:02:37
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/147708
- Cited responsible party
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Role Organisation / Individual Name Details Author Sudholz, Z.J.
External Contact Author Jaques, A.L.
External Contact Author Yaxley, G.M.
External Contact Author Taylor, W.R.
External Contact Author Czarnota, K.
Internal Contact Author Haynes, M.
Internal Contact Author Frewer, L.
External Contact Author Ramsay, R.D.
External Contact Author Downes, P.J.
External Contact Author Cooper, S.A.
External Contact Publisher Wiley Periodicals LLC
External Contact
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Geochemistry, Geophysics, Geosystems
- Issue identification
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Vol 24 Issue 9
- Purpose
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Journal article detailing the lithospheric structure and composition of the Kimberley Craton, Western Australia. Mantle xenoliths from the continental lithospheric mantle were collated and analysed to provide constraints on the geochemical composition and geothermal profile of the lithosphere at the time of their exhumation.
- 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
-
- 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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Australia's Resources Framework
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- Keywords
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Argyle
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- Keywords
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Ellendale
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Kimberley Craton
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- Keywords
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North Australia Craton
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SCLM
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- Keywords
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Sub-Continental Lithospheric Mantle
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Cratonic Lithosphere
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Geothermobarometry
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Diamond Exploration
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Xenoliths
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Xenocrysts
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- theme.ANZRC Fields of Research.rdf
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Earth Sciences
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Inorganic geochemistry
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Igneous and metamorphic petrology
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Geothermics and radiometrics
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Earth system sciences
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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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© 2023 The Authors
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
- 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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Link to Journal
Link to Journal
- Distribution format
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Resource lineage
- Statement
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<div>A dataset of approximately 4000 garnet and Cr diopside analyses has been compiled. With the exception of Argyle xenolith data analyses taken from Jaques et al., (1990, 2018) and Luguet et al., (2018), all Cr diopside and garnet were sourced from heavy mineral concentrate and/or diamond inclusions from kimberlite and lamproite pipes. Our dataset also includes previously unpublished analyses from several intrusions across the Kimberley Craton.</div><div><br></div><div>Quantitative analyses of major and minor oxides were performed using electron probe microanalyzer (EPMA) at the Centre for Advanced Microscopy, the Australian National University. The concentrations of trace element isotopes in garnet and Cr diopside were measured by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) at the Research School of Earth Sciences, Australian National University.</div><div><br></div><div>Equilibration pressure-temperature (PT) of Cr diopside xenocrysts were determined using the single-grain Cr-in-clinopyroxene geobarometer of Sudholz et al. (2021a) and enstatite-in-clinopyroxene single-grain geothermometer of Nimis and Taylor (2000). The filtering of Cr diopside PT estimates followed the protocols of Ziberna et al., (2016). All PT estimates were calculated using the PTEXL spreadsheet (maintained by T. Stachel, University of Alberta). Estimates of equilibration T for pyrope garnet were made using the experimentally calibrated single-grain Ni-in-garnet geothermometer of Sudholz et al. (2021b), using garnet Ni concentrations measured by LA-ICP-MS and an olivine Ni concentration of 3000 ppm. The filtering of Ni-in-garnet T estimates followed the protocols of Sudholz et al., (2021b). The equilibration P of garnet were determined by referencing Ni-in-garnet T estimates to the local geotherm defined by the Cr diopside xenocrysts. The source lithology of the analysed pyrope garnet was identified using the modified version of the G-number classification scheme for mantle garnets (see Sudholz et al. 2022b) (modified after Grütter et al., 2004). The Mg# of olivine (Mg#olv = Mg/ (Mg + Fe)) coexisting with garnet in peridotite was determined by inverting the garnet-olivine Fe-Mg exchange geothermometer of O’Neill and Wood (1979) to solve for Ni-in-garnet T (see Sudholz et al. 2022b). Paleogeotherms for each intrusion were modelled in FITPLOT (Mather et al., 2011) using the PT estimates from Cr diopside.</div>
Metadata constraints
- Title
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Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
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urn:uuid/83635c59-9cd4-4383-948e-ea3df023000a
- Title
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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
- Document
- Name
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Journal Article / Conference Paper
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/147708
- Date info (Creation)
- 2023-10-19T00:49:23
- Date info (Revision)
- 2023-10-19T00:49:23
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