Authors / CoAuthors
Haynes, M. | Morfiadakis, A. | Pincus, J.
Abstract
<div>Building on the national-scale thermochemical tomographic inversions of Haynes & Afonso (2023), we infer regions of subduction-driven metasomatic alteration within the Australia sub-continental lithospheric mantle. Such regions are inferred on the basis of age-corrected magnesium number anomalies for bulk composition of the lithospheric mantle, and the spatial correlation of these features with electrical conductors. This defines a mappable criteria for mineral system conceptual models focused on the transport of melts from re-enriched upper mantle sources. Mapping this feature through stochastic uncertainty propogation of inferred mantle compositions enables us to quantify the level of agreement in the spatial constraints on the feature. Here, we present a voting map that quantifies the relative presence or absence of such features across Australia under any arbitrary model realisation.</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>
Product Type
dataset
eCat Id
149649
Contact for the resource
Resource provider
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Point of contact
Digital Object Identifier
Keywords
- ( Project )
-
- EFTF – Exploring for the Future
- ( Project )
-
- Australia’s Resources Framework
- ( Project )
-
- Lithospheric Geophysics
- ( Project )
-
- Mineral Potential Mapping
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- SCLM
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- Sub-Continental Lithospheric Mantle
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- Metasomatism
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- Thermochemical inversion
- theme.ANZRC Fields of Research.rdf
-
- Earth Sciences
-
- Published_External
Publication Date
2024-06-25T01:09:56
Creation Date
2024-05-03T12:00:00
Security Constraints
Legal Constraints
Status
Purpose
Sub-continental lithospheric mantle zones of inferred subduction-driven metasomatism, as a mappable criteria for integration into a national-scale assessment of iron oxide copper gold mineral potential.
Maintenance Information
notPlanned
Topic Category
geoscientificInformation
Series Information
Lineage
<div>Magnesium number for the bulk lithospheric mantle is calculated from the thermochemical tomographic inversions of Haynes & Afonso (2023). Spatial anomalies in magnesium number trends are estimated after correcting for the secular evolution of the mantle, based on observed correlations with the Sm-Nd depleted mantle model age dataset of Champion (2013). Spatial coincidence of magnesium number anomalies with mantle penetrating electrical conductors (from Duan, 2024) is used to infer regions of subduction-driven metasomatic alteration relevant to iron oxide copper gold mineralisation. The spatial correlations within the lithospheric composition models of Haynes & Afonso (2023) are estimated via the fitting of variogram models using the GSTools software repository (Müller et al., 2022), and the subsequent variograms are used to undertake a stochastic uncertainty propagation.</div><div><br></div><div>Citations for the above references can be found in the embedded metadata statement.</div>
Parent Information
Extents
[-44, -9, 112, 154]
Reference System
WGS 84 / geographic 2D (EPSG: 4326)
Spatial Resolution
Service Information
Associations
Association Type - wasDerivedFrom
Thermo-chemical inversion of the Australian lithospheric mantle (FR23)
eCat Identifier - 147926,
UUID - 925a4194-d032-4da3-b727-09a843014388
Association Type - wasDerivedFrom
AusLAMP mapping lithospheric architecture and mineral potential in central and eastern Australia
eCat Identifier - 149489,
UUID - 2910c15d-a7bc-4bef-88ff-a1825bf2829d
Association Type - wasDerivedFrom
Neodymium depleted mantle model age map of Australia: explanatory notes and user guide
eCat Identifier - 77772,
UUID - e83489ad-7f18-74c0-e044-00144fdd4fa6
Association Type - wasInformedBy
First national mineral system assessment of Australia's iron oxide copper-gold potential
eCat Identifier - 149357,
UUID - afa29632-67df-45e4-a5e7-3ae2261f1172
Association Type - wasInformedBy
The Australian sub-continental lithospheric mantle. Mapping metasomatism as targeting criteria for IOCG
eCat Identifier - 149662,
UUID - d0e82490-9244-480a-ba59-10614295acd5
Source Information