δ13C, δ18O, and Triple Oxygen Isotopes of Benthic Microbial Carbonates from Perennially Ice-Covered Lake Fryxell, Antarctica
Abstract:
Microbial carbonates from Lake Fryxell, McMurdo Dry Valleys, Antarctica show slight (~0-3‰) enrichment in 13C, likely due to preferential uptake of 12C by metabolically-active microbes. Carbonate δ18O is highly variable, with a range of ~24‰ across all samples. Large differences in δ18O can be found at subsampling sites only hundreds of microns to a few millimeters apart. Triple oxygen isotopes suggest mixing of a modified marine fluid with lake waters in benthic pore spaces as a potential mechanism for this isotopic variability.
How to cite this dataset:
Clance, J. J., 2022. δ13C, δ18O, and Triple Oxygen Isotopes of Benthic Microbial Carbonates from Perennially Ice-Covered Lake Fryxell, Antarctica, Version 1.0. Interdisciplinary Earth Data Alliance (IEDA).
https://doi.org/10.26022/IEDA/112383. Accessed 2024-12-26.
DOI Creation Date:
2022-08-01
License:
Creative Commons Attribution-ShareAlike 4.0 International [CC-BY-SA-4.0]
Keyword(s):
Coverage Scope: Regional (Continents, Oceans)
Geographic Location: Antarctica, McMurdo Dry Valleys, Taylor Valley, Lake Fryxell
User Contributed Keyword(s):
Carbonate stable isotopes, microbial carbonates, triple oxygen isotopes
Data Available On:
2022-08-02