Microscale data to macroscale processes: A review of microcharacterization applied to mineral systems

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dc.contributor.authorPearce, Mark A.
dc.contributor.authorGodel, Belinda M.
dc.contributor.authorFisher, Louise A.
dc.contributor.authorSchoneveld, Louise
dc.contributor.authorCleverley, J. S.
dc.contributor.authorOliver, N. H. S.
dc.contributor.authorNugus, Michael
dc.date.accessioned2020-12-18T00:31:32Z
dc.date.issued2017-04-19
dc.date.updated2020-09-06T08:18:20Z
dc.description.abstractMicroanalysis can provide rapid, quantitative characterization of mineral systems that complements the field- and core-scale observations traditionally made in ore deposits. We review recent innovations in microanalytical procedures and their application to studies of ore deposits. Case studies are presented examining how microanalysis can provide constraints on macroscopic processes within mineral systems. Synchrotron X-ray fluorescence shows centimetre-scale chemical variations associated with proximity to mineralization in samples from Sunrise Dam Gold Mine, Western Australia. Pseudomorphs of igneous plagioclase and chemically driven recrystallization interpreted from electron backscatter diffraction suggest that the system was dominated by fluid-driven brecciation with very little shearing. Both the fluid chemistry and fluid pressure evolved during a protracted sequence of vein formation and alteration accompanying gold mineralization. A second case study of sulphide mineralogy at the Mt Keith nickel sulphide deposit, Western Australia demonstrates how X-ray computed tomography combined with trace element mapping can constrain the chemistry and dynamics of magmatic systems. Large-scale interaction between silicate and sulphide melts, shown by homogenous palladium enrichment in pentlandite, leads to a large proportion of globular ores with a high nickel content. Increasing use of microanalysis in ore deposit geology is resulting in the constant reassessment of established models for ore genesis though a combination of micro- and macroscale datasets.en_AU
dc.description.sponsorshipThis research was undertaken on the X-ray fluorescence microscopy beamline at the Australian Synchrotron, Victoria, Australia and was funded by AngloGold Ashanti. LS acknowledges support from a CSIRO Mineral Resources Flagship Internship to support this work.en_AU
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.citationPearce,Mark A. et al. Geological Society, London, Special Publications(2018),453(1):7 http://dx.doi.org/10.1144/SP453.3en_AU
dc.identifier.issn0305-8719en_AU
dc.identifier.urihttp://hdl.handle.net/1885/217377
dc.language.isoen_AUen_AU
dc.publisherGeological Society of Londonen_AU
dc.rights© 2018 Commonwealth Scientific and Industrial Research Organization.en_AU
dc.sourceGeological Society of London Special Publicationen_AU
dc.titleMicroscale data to macroscale processes: A review of microcharacterization applied to mineral systemsen_AU
dc.typeJournal articleen_AU
local.bibliographicCitation.issue1en_AU
local.bibliographicCitation.lastpage39en_AU
local.bibliographicCitation.startpage7en_AU
local.contributor.affiliationPearce, Mark A., CSIRO Mineral Resourcesen_AU
local.contributor.affiliationGodel, Belinda M., CSIRO Mineral Resourcesen_AU
local.contributor.affiliationFisher, Louise A., CSIRO Mineral Resourcesen_AU
local.contributor.affiliationSchoneveld, Louise, College of Science, ANUen_AU
local.contributor.affiliationCleverley, J. S., CSIROen_AU
local.contributor.affiliationOliver, N. H. S., James Cook Universityen_AU
local.contributor.affiliationNugus, Michael, AngloGold Ashanti Ltden_AU
local.contributor.authoremailu5517166@anu.edu.auen_AU
local.contributor.authoruidSchoneveld, Louise, u5517166en_AU
local.description.embargo2099-12-31
local.description.notesImported from ARIESen_AU
local.identifier.absfor040304 - Igneous and Metamorphic Petrologyen_AU
local.identifier.absseo970104 - Expanding Knowledge in the Earth Sciencesen_AU
local.identifier.ariespublicationa383154xPUB12136en_AU
local.identifier.citationvolume453en_AU
local.identifier.doi10.1144/SP453.3en_AU
local.identifier.uidSubmittedBya383154en_AU
local.publisher.urlhttps://sp.lyellcollection.org/en_AU
local.type.statusPublished Versionen_AU

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