Cite this dataset as
Ersek, V., Bendle, J. (2024). Stable isotope and U/Th speleothem measurements from Vietnam, 200,000–334 years BP. NERC EDS Environmental Information Data Centre. (Dataset). https://doi.org/10.5285/f1415ba4-35cd-40db-a717-db6693b03eb0
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This dataset will be available under the terms of the Open Government Licence 
Stable isotope and U/Th speleothem measurements from Vietnam, 200,000–334 years BP
The data includes carbon and oxygen stable isotopes together with top and bottom U-Th ages of stalagmites collected in Northwest, Central and Southern Vietnam. The purpose of this work was to identify suitable specimens that can be used for palaeoclimatic reconstructions. The stalagmites collected were found broken in-situ, and the exact location of the caves is not given here for cave protection purposes. The stalagmites were collected in February and March 2023, and geochemical analyses performed between April and December 2023.
Publication date: 2024-07-25
View record as
Format
Comma-separated values (CSV)
Spatial information
- Study area
-
- Spatial representation type
- Tabular (text)
- Spatial reference system
- WGS 84
Provenance & quality
Samples were brought to the laboratory from the field and cleaned with deionised water. The stalagmites were cut in half along the growth axis using a diamond wiresaw. Subsamples for stable isotopes and U-Th dating were collected using a Sherline 2000 micromill.
Stable isotope values were calculated based on international standards NBS18 and IAEA60. U-Th ages are reported relative to 1950 CE and assume a Thorium-230/Thorium-232 atomic ratio of 4 (± 2) x 10e-6. Samples were completely dissolved in diluted hydrochloric acid and spiked with a Thorium-229/Uranium-233,236 tracer, after which they were converted to nitric form by boiling nitric acid. The U/Th separations were conducted with extraction chromatography and the final U and Th fractions were measured using a Thermo Scientific Neptune MC-ICPMS.
Stable isotope values were calculated based on international standards NBS18 and IAEA60. U-Th ages are reported relative to 1950 CE and assume a Thorium-230/Thorium-232 atomic ratio of 4 (± 2) x 10e-6. Samples were completely dissolved in diluted hydrochloric acid and spiked with a Thorium-229/Uranium-233,236 tracer, after which they were converted to nitric form by boiling nitric acid. The U/Th separations were conducted with extraction chromatography and the final U and Th fractions were measured using a Thermo Scientific Neptune MC-ICPMS.
Correspondence/contact details
Ersek, V.
Northumbria University
Sutherland Building,
Newcastle-Upon-Tyne
NE1 8ST
UNITED KINGDOM
vasile.ersek@northumbria.ac.uk
Newcastle-Upon-Tyne
NE1 8ST
UNITED KINGDOM
Authors
https://orcid.org/0000-0001-9730-0007 Other contacts
- Rights holder
-
Northumbria University
- Custodian
-
NERC EDS Environmental Information Data Centreinfo@eidc.ac.uk
- Publisher
-
NERC EDS Environmental Information Data Centreinfo@eidc.ac.uk
Additional metadata
- Topic categories
- climatologyMeteorologyAtmosphere
geoscientificInformation - INSPIRE theme
- Geology
- Keywords
- carbonate , carbon isotopes , Climate and climate change , Environmental survey , oxygen isotopes , palaeoclimate , speleothem , stable isotopes , Vietnam
- Funding
- Natural Environment Research Council Award: NE/X011771/1
- Last updated
- 19 November 2024 09:58
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More information about these numbers
View numbers valid from 25 July 2024 (information prior to this was not collected)