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Isotopic evidence of acetate turnover in Precambrian continental fracture fluids

Author

Listed:
  • Elliott P. Mueller

    (California Institute of Technology)

  • Juliann Panehal

    (California Institute of Technology)

  • Alexander Meshoulam

    (California Institute of Technology)

  • Min Song

    (University of Toronto)

  • Christian T. Hansen

    (University of Bremen)

  • Oliver Warr

    (University of Toronto
    University of Ottawa)

  • Jason Boettger

    (University of Texas at El Paso)

  • Verena B. Heuer

    (University of Bremen)

  • Wolfgang Bach

    (University of Bremen)

  • Kai-Uwe Hinrichs

    (University of Bremen)

  • John M. Eiler

    (California Institute of Technology)

  • Victoria Orphan

    (California Institute of Technology)

  • Barbara Sherwood Lollar

    (University of Toronto
    1 rue Jussieu)

  • Alex L. Sessions

    (California Institute of Technology)

Abstract

The deep continental crust represents a vast potential habitat for microbial life where its activity remains poorly constrained. Organic acids like acetate are common in these ecosystems, but their role in the subsurface carbon cycle - including the mechanism and rate of their turnover - is still unclear. Here, we develop an isotope-exchange ‘clock’ based on the abiotic equilibration of H-isotopes between acetate and water, which can be used to define the maximum in situ acetate residence time. We apply this technique to the fracture fluids in Birchtree and Kidd Creek mines within the Canadian Precambrian crust. At both sites, we find that acetate residence times are

Suggested Citation

  • Elliott P. Mueller & Juliann Panehal & Alexander Meshoulam & Min Song & Christian T. Hansen & Oliver Warr & Jason Boettger & Verena B. Heuer & Wolfgang Bach & Kai-Uwe Hinrichs & John M. Eiler & Victor, 2024. "Isotopic evidence of acetate turnover in Precambrian continental fracture fluids," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-53438-4
    DOI: 10.1038/s41467-024-53438-4
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    References listed on IDEAS

    as
    1. Koudai Taguchi & Alexis Gilbert & Barbara Sherwood Lollar & Thomas Giunta & Christopher J. Boreham & Qi Liu & Juske Horita & Yuichiro Ueno, 2022. "Low 13C-13C abundances in abiotic ethane," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    2. Barbara Sherwood Lollar & T. C. Onstott & G. Lacrampe-Couloume & C. J. Ballentine, 2014. "The contribution of the Precambrian continental lithosphere to global H2 production," Nature, Nature, vol. 516(7531), pages 379-382, December.
    3. L. Li & B. A. Wing & T. H. Bui & J. M. McDermott & G. F. Slater & S. Wei & G. Lacrampe-Couloume & B. Sherwood Lollar, 2016. "Sulfur mass-independent fractionation in subsurface fracture waters indicates a long-standing sulfur cycle in Precambrian rocks," Nature Communications, Nature, vol. 7(1), pages 1-9, December.
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