Identification

Title

Stable isotope and U/Th speleothem measurements from Vietnam, 200,000–334 years BP

Abstract

[This dataset is embargoed until November 3, 2025]. 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. Full details about this dataset can be found at https://doi.org/10.5285/f1415ba4-35cd-40db-a717-db6693b03eb0

Resource type

dataset

Resource locator

Unique resource identifier

code

https://catalogue.ceh.ac.uk/id/f1415ba4-35cd-40db-a717-db6693b03eb0

codeSpace

doi:

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

climatologyMeteorologyAtmosphere

geoscientificInformation

Keywords

Keyword set

keyword value

Geology

originating controlled vocabulary

title

GEMET - INSPIRE themes, version 1.0

reference date

date type

publication

effective date

2008-06-01

Geographic location

West bounding longitude

101.851

East bounding longitude

109.937

North bounding latitude

23.488

South bounding latitude

8.238

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2024-07-25

Frequency of update

Quality and validity

Lineage

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.

Conformity

Conformity report

specification

title

Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

reference date

date type

publication

effective date

2010-12-08

degree

explanation

Data format

name of format

Comma-separated values (CSV)

version of format

Constraints related to access and use

Constraint set

Limitations on public access

Embargoed

Constraint set

Limitations on public access

Constraint set

Limitations on public access

If you reuse this data, you should cite: 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 https://doi.org/10.5285/f1415ba4-35cd-40db-a717-db6693b03eb0

Responsible organisations

Responsible party

organisation name

email address

vasile.ersek@northumbria.ac.uk

web address

https://orcid.org/0000-0001-9730-0007

description: ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers.

function: information