Yang, H;
Lencioni, L;
Patmore, I;
(2018)
Importance of Surface Sediments for Reliable 210Pb Dating.
In:
Proceedings: 6th International Symposium on Sediment Management San Cristóbal de Las Casas, Chiapas, Mexico.
(pp. pp. 341-345).
Revista Internacional De Contaminacion Ambiental: San Cristóbal de Las Casas, Chiapas, Mexico.
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Abstract
Lead-210, 137Cs and 241Am dating techniques have been extensively used in the dating of recent sediments. However, collection of an intact core is the first essential step towards having reliable 210Pb chronologies for the sediments. We collected short gravity cores from Loch Morar, a deep (310 m max. depth), steep-sided lake in Scotland. Lead-210 chronologies for one of the cores did not match with the 137Cs and 241Am records, and the radionuclide data indicate that surface sediments in this core were likely missing. Therefore, sediment chronologies and accumulation rates calculated from unsupported 210Pb activities in the core were deemed unreliable, as confirmed by another core from the same lake. Dating of the cores suggests that sediment dating not only depends on accurate counting of radionuclide activities, but also on the integrity of the cores, in turn determined by sampling location. Importantly, however 210Pb, 137Cs and 241Am data can be carefully assessed to determine the integrity of sediment cores.
| Type: | Proceedings paper |
|---|---|
| Title: | Importance of Surface Sediments for Reliable 210Pb Dating |
| Event: | 6th International Symposium on Sediment Management |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.20937/2018.34.M6ISSM |
| Publisher version: | https://doi.org/10.20937/2018.34.M6ISSM |
| Language: | English |
| Additional information: | This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL SLASH UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS > Dept of Geography |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10055760 |
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