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Catchment-based gold prospectivity analysis combining geochemical, geophysical and geological data across northern Australia

Cracknell, Matthew J.; de Caritat, Patrice

Description

The results of a pilot study into the application of an unsupervised clustering approach to the analysis of catchment-based National Geochemical Survey of Australia (NGSA) geochemical data combined with geophysical and geological data across northern Australia are documented. NGSA Mobile Metal Ion (R) (MMI) element concentrations and first and second order statistical summaries across catchments of geophysical data and geological data are integrated and analysed using Self-Organizing Maps...[Show more]

dc.contributor.authorCracknell, Matthew J.
dc.contributor.authorde Caritat, Patrice
dc.date.accessioned2020-01-10T04:16:16Z
dc.date.available2020-01-10T04:16:16Z
dc.identifier.issn1467-7873
dc.identifier.urihttp://hdl.handle.net/1885/196897
dc.description.abstractThe results of a pilot study into the application of an unsupervised clustering approach to the analysis of catchment-based National Geochemical Survey of Australia (NGSA) geochemical data combined with geophysical and geological data across northern Australia are documented. NGSA Mobile Metal Ion (R) (MMI) element concentrations and first and second order statistical summaries across catchments of geophysical data and geological data are integrated and analysed using Self-Organizing Maps (SOM). Input features that contribute significantly to the separation of catchment clusters are objectively identified and assessed. A case study of the application of SOM for assessing the spatial relationships between Au mines and mineral occurrences in catchment clusters is presented. Catchments with high mean Au code-vector concentrations are found downstream of areas known to host Au mineralization. This knowledge is used to identify upstream catchments exhibiting geophysical and geological features that indicate likely Au mineralization. The approach documented here suggests that catchment-based geochemical data and summaries of geophysical and geological data can be combined to highlight areas that potentially host previously unrecognised Au mineralization.
dc.description.sponsorshipThe NGSA project was part of the Australian Government’s Onshore Energy Security Program 2006 – 2011, from which funding support is gratefully acknowledged.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherGeological Society of London
dc.rights© 2017 Commonwealth of Australia (Geoscience Australia).
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/
dc.sourceGeochemistry: Exploration, Environment, Analysis
dc.subjectRegolith
dc.subjectGeochemistry
dc.subjectGeophysics
dc.subjectGeology
dc.subjectSelf-Organizing Maps
dc.subjectNational Geochemical Survey of Australia
dc.titleCatchment-based gold prospectivity analysis combining geochemical, geophysical and geological data across northern Australia
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume17
dcterms.dateAccepted2017-03-08
dc.date.issued2017-06-01
local.identifier.absfor040201 - Exploration Geochemistry
local.identifier.ariespublicationu4485658xPUB1021
local.publisher.urlhttps://pubs.geoscienceworld.org/
local.type.statusPublished Version
local.contributor.affiliationCracknell, Matthew J., University of Tasmania
local.contributor.affiliationDe Caritat, Patrice, College of Science, ANU
local.bibliographicCitation.issue3
local.bibliographicCitation.startpage204
local.bibliographicCitation.lastpage216
local.identifier.doi10.1144/geochem2016-012
local.identifier.absseo840199 - Mineral Exploration not elsewhere classified
local.identifier.absseo961404 - Mining Soils
dc.date.updated2019-08-25T08:19:29Z
local.identifier.scopusID2-s2.0-85027366747
local.identifier.thomsonID000406768000004
dcterms.accessRightsOpen Access
dc.provenanceThis is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/). Published by The Geological Society of London for GSL and AAG.
dc.rights.licenseCreative Commons Attribution License
CollectionsANU Research Publications

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