Chronostratigraphy of a 270-ka sediment record from Lake Selina, Tasmania: Combining radiometric, geomagnetic and climatic dating
dc.contributor.author | Lise-Pronovost, Agathe | |
dc.contributor.author | Fletcher, Michael-Shawn | |
dc.contributor.author | Simon, Quentin | |
dc.contributor.author | Jacobs, Zenobia | |
dc.contributor.author | Gadd, Patricia S | |
dc.contributor.author | Heslop, David | |
dc.contributor.author | Herries, Andy I R | |
dc.contributor.author | Yokoyama, Yusuke | |
dc.contributor.author | Aster team | |
dc.date.accessioned | 2023-06-13T23:54:26Z | |
dc.date.issued | 2021-03 | |
dc.date.updated | 2022-04-03T08:17:54Z | |
dc.description.abstract | Lake 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.sponsorship | This 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.mimetype | application/pdf | en_AU |
dc.identifier.issn | 1871-1014 | en_AU |
dc.identifier.uri | http://hdl.handle.net/1885/293463 | |
dc.language.iso | en_AU | en_AU |
dc.publisher | Elsevier | en_AU |
dc.relation | http://purl.org/au-research/grants/arc/IN140100050 | en_AU |
dc.relation | http://purl.org/au-research/grants/arc/DP190100874 | en_AU |
dc.rights | © 2021 Elsevier B.V | en_AU |
dc.source | Quaternary Geochronology | en_AU |
dc.subject | Paleomagnetism | en_AU |
dc.subject | Optically stimulated luminescence | en_AU |
dc.subject | Radiocarbon | en_AU |
dc.subject | Authigenic 10Be/9Be ratio | en_AU |
dc.subject | Pleistocene | en_AU |
dc.subject | Lake sediment | en_AU |
dc.subject | Australia | en_AU |
dc.title | Chronostratigraphy of a 270-ka sediment record from Lake Selina, Tasmania: Combining radiometric, geomagnetic and climatic dating | en_AU |
dc.type | Journal article | en_AU |
local.bibliographicCitation.lastpage | 101152-23 | en_AU |
local.bibliographicCitation.startpage | 101152-1 | en_AU |
local.contributor.affiliation | Lise-Pronovost, Agathe, University of Melbourne | en_AU |
local.contributor.affiliation | Fletcher, Michael-Shawn, University of Melbourne | en_AU |
local.contributor.affiliation | Simon, Quentin, Aix Marseille University | en_AU |
local.contributor.affiliation | Jacobs, Zenobia, University of Wollongong | en_AU |
local.contributor.affiliation | Gadd, Patricia S, Australian Nuclear Science and Technology Organisation | en_AU |
local.contributor.affiliation | Heslop, David, College of Science, ANU | en_AU |
local.contributor.affiliation | Herries, Andy I R, La Trobe University | en_AU |
local.contributor.affiliation | Yokoyama, Yusuke, University of Tokyo | en_AU |
local.contributor.affiliation | Aster team, -, Aix Marseille University | en_AU |
local.contributor.authoremail | u4919989@anu.edu.au | en_AU |
local.contributor.authoruid | Heslop, David, u4919989 | en_AU |
local.description.embargo | 2099-12-31 | |
local.description.notes | Imported from ARIES | en_AU |
local.identifier.absfor | 370607 - Magnetism and palaeomagnetism | en_AU |
local.identifier.absfor | 370905 - Quaternary environments | en_AU |
local.identifier.absseo | 190502 - Climate variability (excl. social impacts) | en_AU |
local.identifier.absseo | 280107 - Expanding knowledge in the earth sciences | en_AU |
local.identifier.ariespublication | a383154xPUB17718 | en_AU |
local.identifier.citationvolume | 62 | en_AU |
local.identifier.doi | 10.1016/j.quageo.2021.101152 | en_AU |
local.identifier.scopusID | 2-s2.0-85100637400 | |
local.identifier.uidSubmittedBy | a383154 | en_AU |
local.publisher.url | https://www.elsevier.com/en-au | en_AU |
local.type.status | Published Version | en_AU |
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