Chronostratigraphy of a 270-ka sediment record from Lake Selina, Tasmania: Combining radiometric, geomagnetic and climatic dating

dc.contributor.authorLise-Pronovost, Agathe
dc.contributor.authorFletcher, Michael-Shawn
dc.contributor.authorSimon, Quentin
dc.contributor.authorJacobs, Zenobia
dc.contributor.authorGadd, Patricia S
dc.contributor.authorHeslop, David
dc.contributor.authorHerries, Andy I R
dc.contributor.authorYokoyama, Yusuke
dc.contributor.authorAster team
dc.date.accessioned2023-06-13T23:54:26Z
dc.date.issued2021-03
dc.date.updated2022-04-03T08:17:54Z
dc.description.abstractLake sediment archives covering several glacial cycles are scarce in the Southern Hemisphere and they are challenging to date. Here we present the chronostratigraphy of the oldest continuous lake sediment archive in Tasmania, Australia; a 5.5 m and 270 ka (Marine Isotope Stage 8) sediment core from Lake Selina. We employ radiometric dating (radiocarbon and optically stimulated luminescence) and relative dating (geomagnetic and climate comparisons). Bayesian modeling of the radiometric ages reaches back to 80 ka (1.7 m) and relative dating using a dynamic programing algorithm allows dating of the full sequence. Elemental data, magnetic properties and beryllium isotopes from Lake Selina reveal a close fit to Antarctic ice core climate proxies. Weaker correlation during the Last Glacial Period (MIS 2–4) is attributed to additional local factors impacting Lake Selina proxies at a time of climate changes and human arrival into Tasmania. Over that period, full vector paleomagnetic records and authigenic 10Be/9Be ratios are combined to identify the Laschamp geomagnetic excursion for the first time in Australia and constrain the chronology. The multi-method approach provides two preferred age models, indiscernible within their uncertainties, which allows the use of a geomagnetic dipole-independent (full archive) or a climate-independent (111 ka to present) age model.en_AU
dc.description.sponsorshipThis research was supported by use of the Nectar Research Cloud; a collaborative Australian research platform supported by the National Collaborative Research Infrastructure Strategy (NCRIS). We thank Maarten Blaauw for support with rbacon and Xiang Zhao and Andrew Roberts for assistance at the Paleomagnetism Laboratory at the Australian National University. This project was funded by the Australian Research Council Discovery Indigenous IN140100050 to M.-S. Fletcher and IN170100062 to M.-S. Fletcher and A. Lis´e-Pronovost. A. Lis´e-Pronovost was supported by a La Trobe University DVCR Fellowship and a University of Melbourne McKenzie Fellowship. D. Heslop was supported by the Australian Research Council (DP190100874). The ASTER AMS national facility (CEREGE, Aix en Provence) is supported by INSU/CNRS, ANR through the EQUIPEX “ASTER-CEREGE” action, and IRD.en_AU
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn1871-1014en_AU
dc.identifier.urihttp://hdl.handle.net/1885/293463
dc.language.isoen_AUen_AU
dc.publisherElsevieren_AU
dc.relationhttp://purl.org/au-research/grants/arc/IN140100050en_AU
dc.relationhttp://purl.org/au-research/grants/arc/DP190100874en_AU
dc.rights© 2021 Elsevier B.Ven_AU
dc.sourceQuaternary Geochronologyen_AU
dc.subjectPaleomagnetismen_AU
dc.subjectOptically stimulated luminescenceen_AU
dc.subjectRadiocarbonen_AU
dc.subjectAuthigenic 10Be/9Be ratioen_AU
dc.subjectPleistoceneen_AU
dc.subjectLake sedimenten_AU
dc.subjectAustraliaen_AU
dc.titleChronostratigraphy of a 270-ka sediment record from Lake Selina, Tasmania: Combining radiometric, geomagnetic and climatic datingen_AU
dc.typeJournal articleen_AU
local.bibliographicCitation.lastpage101152-23en_AU
local.bibliographicCitation.startpage101152-1en_AU
local.contributor.affiliationLise-Pronovost, Agathe, University of Melbourneen_AU
local.contributor.affiliationFletcher, Michael-Shawn, University of Melbourneen_AU
local.contributor.affiliationSimon, Quentin, Aix Marseille Universityen_AU
local.contributor.affiliationJacobs, Zenobia, University of Wollongongen_AU
local.contributor.affiliationGadd, Patricia S, Australian Nuclear Science and Technology Organisationen_AU
local.contributor.affiliationHeslop, David, College of Science, ANUen_AU
local.contributor.affiliationHerries, Andy I R, La Trobe Universityen_AU
local.contributor.affiliationYokoyama, Yusuke, University of Tokyoen_AU
local.contributor.affiliationAster team, -, Aix Marseille Universityen_AU
local.contributor.authoremailu4919989@anu.edu.auen_AU
local.contributor.authoruidHeslop, David, u4919989en_AU
local.description.embargo2099-12-31
local.description.notesImported from ARIESen_AU
local.identifier.absfor370607 - Magnetism and palaeomagnetismen_AU
local.identifier.absfor370905 - Quaternary environmentsen_AU
local.identifier.absseo190502 - Climate variability (excl. social impacts)en_AU
local.identifier.absseo280107 - Expanding knowledge in the earth sciencesen_AU
local.identifier.ariespublicationa383154xPUB17718en_AU
local.identifier.citationvolume62en_AU
local.identifier.doi10.1016/j.quageo.2021.101152en_AU
local.identifier.scopusID2-s2.0-85100637400
local.identifier.uidSubmittedBya383154en_AU
local.publisher.urlhttps://www.elsevier.com/en-auen_AU
local.type.statusPublished Versionen_AU

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