Itrax μ-XRF core scanning for rapid tephrostratigraphic analysis: a case study from the Auckland Volcanic Field maar lakes

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dc.contributor.authorPeti, Len_AU
dc.contributor.authorGadd, PSen_AU
dc.contributor.authorHopkins, Jen_AU
dc.contributor.authorAugustinus, PCen_AU
dc.date.accessioned2021-06-27T23:42:49Zen_AU
dc.date.available2021-06-27T23:42:49Zen_AU
dc.date.issued2019-07-23en_AU
dc.date.statistics2021-06-16en_AU
dc.description.abstractItrax micro X-ray fluorescence (μ-XRF) core scanning is a non-destructive, rapid approach to measuring elemental concentrations and their variability in sediment cores. As such, it records elemental signatures of tephra layers, which serve as correlation tie points and chronological markers for these sedimentary archives of past climatic changes. The traditional tephra identification approach using electron microprobe-based geochemical fingerprinting of glass shards is a slow and invasive process, whilst μ-XRF scanning of rhyolite tephra in sediment cores from Auckland (New Zealand) could provide a faster, non-invasive approach to aid the recognition of tephra layers. This study highlights the potential and pitfalls in this novel approach: changes in most scanning parameters, and the use of two different Itrax core scanners, still led to similar chemical characterizations of the tephra layers. Changes in other scanning parameters have a biasing influence on the chemical characterization of the tephra, which would lead to misidentification of unknown layers. We demonstrate that μ-XRF core scanning provides a faster and non-invasive approach to correlation of sediment sequences using chemically distinct, visually pure tephra layers if a strict scanning protocol is followed. Nevertheless, an extensive database of μ-XRF-scanned rhyolite tephra is required for recognition of unknown tephra units using this approach. Copyright © 2019 John Wiley & Sons, Ltd.en_AU
dc.identifier.citationPeti, L., Gadd, P. S., Hopkins, J. L., & Augustinus, P. C. (2020). Itrax μ‐XRF core scanning for rapid tephrostratigraphic analysis: a case study from the Auckland Volcanic Field maar lakes. Journal of Quaternary Science, 35(1-2), 54-65. doi:10.1002/jqs.3133en_AU
dc.identifier.issn1099-1417en_AU
dc.identifier.issue1-2en_AU
dc.identifier.journaltitleJournal of Quaternary Scienceen_AU
dc.identifier.pagination54-65en_AU
dc.identifier.urihttps://doi.org/10.1002/jqs.3133en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10905en_AU
dc.identifier.volume35en_AU
dc.language.isoenen_AU
dc.publisherJohn Wiley & Sons, Incen_AU
dc.subjectX-ray fluorescence analysisen_AU
dc.subjectElectron microprobe analysisen_AU
dc.subjectNondestructive analysisen_AU
dc.subjectLakesen_AU
dc.subjectVolcanic regionsen_AU
dc.subjectNew Zealanden_AU
dc.titleItrax μ-XRF core scanning for rapid tephrostratigraphic analysis: a case study from the Auckland Volcanic Field maar lakesen_AU
dc.typeJournal Articleen_AU
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