Scientific drilling of sediments at Darwin Crater, Tasmania

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dc.contributor.authorLisé-Pronovost, Aen_AU
dc.contributor.authorFletcher, MSen_AU
dc.contributor.authorMallett, Ten_AU
dc.contributor.authorMariani, Men_AU
dc.contributor.authorLewis, RJen_AU
dc.contributor.authorGadd, PSen_AU
dc.contributor.authorHerries, AIRen_AU
dc.contributor.authorBlaauw, Men_AU
dc.contributor.authorHeijnis, Hen_AU
dc.contributor.authorHodgson, DAen_AU
dc.contributor.authorPedro, JBen_AU
dc.date.accessioned2021-06-10T03:38:16Zen_AU
dc.date.available2021-06-10T03:38:16Zen_AU
dc.date.issued2019-06-12en_AU
dc.date.statistics2021-06-10en_AU
dc.descriptionThis work is distributed under the Creative Commons Attribution 4.0 License.en_AU
dc.description.abstractA 70 m long continental sediment record was recovered at Darwin Crater in western Tasmania, Australia. The sediment succession includes a pre-lake silty sand deposit overlain by lacustrine silts that have accumulated in the ∼816 ka meteorite impact crater. A total of 160 m of overlapping sediment cores were drilled from three closely spaced holes. Here we report on the drilling operations at Darwin Crater and present the first results from petrophysical whole core logging, lithological core description, and multi-proxy pilot analysis of core end samples. The multi-proxy dataset includes spectrophotometry, grain size, natural gamma rays, paleo- and rock magnetism, loss on ignition, and pollen analyses. The results provide clear signatures of alternating, distinctly different lithologies likely representing glacial and interglacial sediment facies. Initial paleomagnetic analysis indicate normal magnetic polarity in the deepest core at Hole B. If acquired at the time of deposition, this result indicates that the sediment 1 m below commencement of lacustrine deposition post-date the Matuyama–Brunhes geomagnetic reversal ∼773 ka. © Author(s) 2019.en_AU
dc.identifier.citationLisé-Pronovost, A., Fletcher, M.-S., Mallett, T., Mariani, M., Lewis, R., Gadd, P. S., Herries, A. I. R, Blaauw, M., Heijnis, H., Hodgson, D. A. & Pedro, J. B. (2019). Scientific drilling of sediments at Darwin Crater, Tasmania. Scientific Drilling, 25, 1-14. doi:10.5194/sd-25-1-2019en_AU
dc.identifier.issn1816-3459en_AU
dc.identifier.journaltitleScientific Drillingen_AU
dc.identifier.pagination1-14en_AU
dc.identifier.urihttps://doi.org/10.5194/sd-25-1-2019en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10851en_AU
dc.identifier.volume25en_AU
dc.language.isoenen_AU
dc.publisherCopernicus Publicationsen_AU
dc.subjectSedimentsen_AU
dc.subjectSilten_AU
dc.subjectDrill coresen_AU
dc.subjectCratersen_AU
dc.subjectPollenen_AU
dc.subjectSpectrophotometryen_AU
dc.subjectGrain sizeen_AU
dc.subjectGamma radiationen_AU
dc.subjectMagnetismen_AU
dc.subjectTasmaniaen_AU
dc.titleScientific drilling of sediments at Darwin Crater, Tasmaniaen_AU
dc.typeJournal Articleen_AU
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