Chronostratigraphy of a 270-ka sediment record from Lake Selina, Tasmania: Combining radiometric, geomagnetic and climatic dating
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...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.931786 2024-10-20T14:04:36+00:00 Chronostratigraphy of a 270-ka sediment record from Lake Selina, Tasmania: Combining radiometric, geomagnetic and climatic dating Lisé-Pronovost, Agathe Fletcher, Michael-Shawn Simon, Quentin Jacobs, Zenobia Gadd, Patricia S Heslop, David Herries, Andy IR Yokoyama, Yusuke LATITUDE: -41.878100 * LONGITUDE: 145.609400 2021 application/zip, 2.4 MBytes https://doi.pangaea.de/10.1594/PANGAEA.931786 https://doi.org/10.1594/PANGAEA.931786 en eng PANGAEA Lisé-Pronovost, Agathe; Fletcher, Michael-Shawn; Simon, Quentin; Jacobs, Zenobia; Gadd, Patricia S; Heslop, David; Herries, Andy IR; Yokoyama, Yusuke (2021): Chronostratigraphy of a 270-ka sediment record from Lake Selina, Tasmania: Combining radiometric, geomagnetic and climatic dating. Quaternary Geochronology, 62, 101152, https://doi.org/10.1016/j.quageo.2021.101152 https://doi.pangaea.de/10.1594/PANGAEA.931786 https://doi.org/10.1594/PANGAEA.931786 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess Core Paleomagnetic data TAS1402 Tasmania Australia dataset 2021 ftpangaea https://doi.org/10.1594/PANGAEA.93178610.1016/j.quageo.2021.101152 2024-10-02T00:42:44Z 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. Dataset Antarc* Antarctic ice core PANGAEA - Data Publisher for Earth & Environmental Science Antarctic ENVELOPE(145.609400,145.609400,-41.878100,-41.878100) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Core Paleomagnetic data TAS1402 Tasmania Australia |
spellingShingle |
Core Paleomagnetic data TAS1402 Tasmania Australia Lisé-Pronovost, Agathe Fletcher, Michael-Shawn Simon, Quentin Jacobs, Zenobia Gadd, Patricia S Heslop, David Herries, Andy IR Yokoyama, Yusuke Chronostratigraphy of a 270-ka sediment record from Lake Selina, Tasmania: Combining radiometric, geomagnetic and climatic dating |
topic_facet |
Core Paleomagnetic data TAS1402 Tasmania Australia |
description |
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. |
format |
Dataset |
author |
Lisé-Pronovost, Agathe Fletcher, Michael-Shawn Simon, Quentin Jacobs, Zenobia Gadd, Patricia S Heslop, David Herries, Andy IR Yokoyama, Yusuke |
author_facet |
Lisé-Pronovost, Agathe Fletcher, Michael-Shawn Simon, Quentin Jacobs, Zenobia Gadd, Patricia S Heslop, David Herries, Andy IR Yokoyama, Yusuke |
author_sort |
Lisé-Pronovost, Agathe |
title |
Chronostratigraphy of a 270-ka sediment record from Lake Selina, Tasmania: Combining radiometric, geomagnetic and climatic dating |
title_short |
Chronostratigraphy of a 270-ka sediment record from Lake Selina, Tasmania: Combining radiometric, geomagnetic and climatic dating |
title_full |
Chronostratigraphy of a 270-ka sediment record from Lake Selina, Tasmania: Combining radiometric, geomagnetic and climatic dating |
title_fullStr |
Chronostratigraphy of a 270-ka sediment record from Lake Selina, Tasmania: Combining radiometric, geomagnetic and climatic dating |
title_full_unstemmed |
Chronostratigraphy of a 270-ka sediment record from Lake Selina, Tasmania: Combining radiometric, geomagnetic and climatic dating |
title_sort |
chronostratigraphy of a 270-ka sediment record from lake selina, tasmania: combining radiometric, geomagnetic and climatic dating |
publisher |
PANGAEA |
publishDate |
2021 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.931786 https://doi.org/10.1594/PANGAEA.931786 |
op_coverage |
LATITUDE: -41.878100 * LONGITUDE: 145.609400 |
long_lat |
ENVELOPE(145.609400,145.609400,-41.878100,-41.878100) |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic ice core |
genre_facet |
Antarc* Antarctic ice core |
op_relation |
Lisé-Pronovost, Agathe; Fletcher, Michael-Shawn; Simon, Quentin; Jacobs, Zenobia; Gadd, Patricia S; Heslop, David; Herries, Andy IR; Yokoyama, Yusuke (2021): Chronostratigraphy of a 270-ka sediment record from Lake Selina, Tasmania: Combining radiometric, geomagnetic and climatic dating. Quaternary Geochronology, 62, 101152, https://doi.org/10.1016/j.quageo.2021.101152 https://doi.pangaea.de/10.1594/PANGAEA.931786 https://doi.org/10.1594/PANGAEA.931786 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.93178610.1016/j.quageo.2021.101152 |
_version_ |
1813453416541716480 |