Product catalogue
State-of-the-art analysis of geochemical data for mineral exploration
Multi-element geochemical surveys of rocks, soils, stream/lake/floodplain sediments, and regolith are typically carried out at continental, regional and local scales. The chemistry of these materials is defined by their primary mineral assemblages and their subsequent modification by comminution and weathering. Modern geochemical datasets represent a multi-dimensional geochemical space that can be studied using multivariate statistical methods from which patterns reflecting geochemical/geological processes are described (process discovery). These patterns form the basis from which probabilistic predictive maps are created (process validation). Processing geochemical survey data requires a systematic approach to effectively interpret the multi-dimensional data in a meaningful way. Problems that are typically associated with geochemical data include closure, missing values, censoring, merging, levelling different datasets, and adequate spatial sample design. Recent developments in advanced multivariate analytics, geospatial analysis and mapping provide an effective framework to analyze and interpret geochemical datasets. Geochemical and geological processes can often be recognized through the use of data discovery procedures such as the application of principal component analysis. Classification and predictive procedures can be used to confirm lithological variability, alteration, and mineralization. Geochemical survey data of lake/till sediments from Canada and of floodplain sediments from Australia show that predictive maps of bedrock and regolith processes can be generated. Upscaling a multivariate statistics-based prospectivity analysis for arc related Cu-Au mineralization from a regional survey in the southern Thomson Orogen in Australia to the continental scale, reveals a number of regions with similar (or stronger) multivariate response and hence potentially similar (or higher) mineral potential throughout Australia.
<b>Citation:</b> E. C. Grunsky, P. de Caritat; State-of-the-art analysis of geochemical data for mineral exploration. <i>Geochemistry: Exploration, Environment, Analysis</i> 2019; 20 (2): 217–232.
doi: https://doi.org/10.1144/geochem2019-031
This article appears in multiple journals (Lyell Collection & GeoScienceWorld)
Simple
Identification info
- Date (Creation)
- 2019-05-02
- Date (Publication)
- 2023-10-26T21:50:13
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/128473
- Cited responsible party
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Role Organisation / Individual Name Details Author Grunsky, E.
Author de Caritat, P.
Publisher The Geological Society of London for GSL and AAG
External Contact
- Name
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Geochemistry: Exploration, Environment, Analysis - GEEA
- Issue identification
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Volume 20, Number 2, May 2020
- Page
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217-232
- Purpose
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Submission to Geochemistry: Exploration, Environment, Analysis (GEEA)
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- Completed
- Point of contact
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Role Organisation / Individual Name Details Co-author Commonwealth of Australia (Geoscience Australia)
Voice Resource provider Minerals, Energy and Groundwater Division
External Contact Point of contact Main, P.
MEG Internal Contact
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- Geoscientific information
Extent
Temporal extent
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- 2007-01-01 2019-05-02
Extent
))
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- As needed
Resource format
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Product data repository: Various Formats
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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
- theme.ANZRC Fields of Research.rdf
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Exploration Geochemistry
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Applied Statistics
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EARTH SCIENCES
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- Keywords
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geochemistry
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analytical methods
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compostional data
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multivariate analytics
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process discovery
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process validation
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predictive mapping
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machine learning
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geospatial coherence
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Melville Peninsula
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Nunavut
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- Keywords
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Thomson Region
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- Keywords
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New South Wales
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- Keywords
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Published_External
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Creative Commons Attribution 4.0 International Licence
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CC-BY
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4.0
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©2019 Commonwealth of Australia (Geoscience Australia)
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Australian Government Security ClassificationSystem
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- 2018-11-01T00:00:00
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Submission to Geochemistry: Exploration, Environment, Analysis (GEEA)
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Australian Government Security ClassificationSystem
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
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Journal Articles and Conference Papers
Alternative metadata reference
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Geoscience Australia - short identifier for metadata record with
uuid
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- Date info (Creation)
- 2019-04-08T01:55:29
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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
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ISO 19115-3
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
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Version 2.0, September 2018
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