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Geochemistry of the North Australian Craton: Piecing it Together  


Authors / CoAuthors

Main, P.T. | Champion, D.C.

Abstract

<p>Australia has a significant number of surface sediment geochemical surveys that have been undertaken by industry and government during the past 50 years. These surveys represent a vast investment, but up to now have been used in isolation from one another. The key to maximising the full potential of these data and the information they provide for mineral exploration, environmental management and agricultural purposes is using all surveys together, seamlessly. These geochemical surveys have not only sampled various landscape elements but have used multiple analytical techniques, instrumentation and laboratories. The geochemical data from these surveys need to be levelled to eliminate, as much as possible, non-geological variation. Using a variety of methodologies, including reanalysis of both international standards and small subsets of samples from previous surveys, we have created a seamless surface geochemical map for northern Australia, from nine surveys with 15605 samples. We tested our approach using two surveys from the southern Thomson Orogen, which removed interlaboratory and other analytical variation. Creation of the new combined and levelled northern Australian dataset paves the way for the application of statistical techniques, such as principal component analysis and machine learning, which maximise the value of these legacy data holdings. The methodology documented here can be applied to additional geochemical datasets that become available. <p><b>Citation:</b> Main, P. T. and Champion, D. C., 2020. Geochemistry of the North Australian Craton: piecing it together. In: Czarnota, K., Roach, I., Abbott, S., Haynes, M., Kositcin, N., Ray, A. and Slatter, E. (eds.) Exploring for the Future: Extended Abstracts, Geoscience Australia, Canberra, 1–4.

Product Type

document

eCat Id

133667

Contact for the resource

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Commonwealth of Australia (Geoscience Australia)  
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia

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Digital Object Identifier

http://dx.doi.org/10.11636/133667

Keywords

theme.ANZRC Fields of Research.rdf
  • EARTH SCIENCES
( Project )
  • EFTF
( Project )
  • Exploring for the Future
( Theme )
  • Geo Chemistry
  • Surface Geochemistry
  • North Australia Craton
  • Northern Australia
  • Published_External
  • NAGS
  • NGSA
  • Northern Australian Geochemical Survey
  • National Geochemical Survey of Australia

Publication Date

2020-05-08T02:16:26

Creation Date

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Australian Government Security ClassificationSystem    

Classification - unclassified

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Creative Commons Attribution 4.0 International Licence    

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Use - license

Status

onGoing

Purpose

Maintenance Information

asNeeded

Topic Category

geoscientificInformation

Series Information

Lineage

Using a variety of methodologies, including reanalysis of both international standards and small subsets of samples from previous surveys, we have created a seamless surface geochemical dataset for northern Australia, from nine surveys with 15605 samples. We tested our approach using two surveys from the southern Thomson Orogen, which removed interlaboratory and other analytical variation.

Parent Information

Extents

[-25.6151, -9.8245, 109.4238, 158.4082]

Reference System

Spatial Resolution

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Downloads and Links

Extended Abstract for download (pdf) [1.4 MB]  

Source Information



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