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Cited by 135Origins and Evolution of LifeGeochemistry and Elemental AnalysisCO2 Sequestration and Geologic Interactions

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Formation of H2 and CH4by weathering of olivine at temperatures between 30 and 70°C

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Neubeck, Anna, Duc, Nguyen Thanh, Bastviken, David, Crill, Patrick, Holm, Nils G·2011·Geochemical Transactions
DOI 10.1186/1467-4866-12-6PMC PMC3157414
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Abstract

Hydrocarbons such as CH4 are known to be formed through the Fischer-Tropsch or Sabatier type reactions in hydrothermal systems usually at temperatures above 100°C. Weathering of olivine is sometimes suggested to account for abiotic formation of CH4 through its redox lowering and water splitting properties. Knowledge about the CH4 and H2 formation processes at low temperatures is important for the research about the origin and cause of early Earth and Martian CH4 and for CO2 sequestration. We have conducted a series of low temperature, long-term weathering experiments in which we have tested the CH4 and H2 formation potential of forsteritic olivine.The results show low temperature CH4 production that is probably influenced by chromite and magnetite as catalysts. Extensive analyses of a potential CH4 source trapped in the crystal structure of the olivine showed no signs of incorporated CH4. Also, the available sources of organic carbon were not enough to support the total amount of CH4 detected in our experiments. There was also a linear relationship between silica release into solution and the net CH4 accumulation into the incubation bottle headspaces suggesting that CH4 formation under these conditions could be a qualitative indicator of olivine dissolution.It is likely that minerals such as magnetite, chromite and other metal-rich minerals found on the olivine surface catalyze the formation of CH4, because of the low temperature of the system. This may expand the range of environments plausible for abiotic CH4 formation both on Earth and on other terrestrial bodies.

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Figure 1 ESEM spot analyses of potential catalyst sites on the olivine surfaces used in the incubation experiments. Relative proportions of elements in weight percent is presented in each picture. The high carbon content in picture B and D is due to carbon coating of the sample. A) SEM image of a chrome-spinel crystal taken using optical microscopy, B) SEM image of a Cr and Fe-rich phase C) SEM image of a Fe-rich phase and D) SEM image of Fe, Ni and Cu-rich phases.
Figure 1 ESEM spot analyses of potential catalyst sites on the olivine surfaces used in the incubation experiments. Relative proportions of elements in weight percent is presented in each picture. The high carbon content in picture B and D is due to carbon coating of the sample. A) SEM image of a chrome-spinel crystal taken using optical microscopy, B) SEM image of a Cr and Fe-rich phase C) SEM image of a Fe-rich phase and D) SEM image of Fe, Ni and Cu-rich phases.CC BY · PubMed Central
Figure 2 ESEM pictures showing water influence on olivine surfaces before and after incubation. An initial olivine grain surface (A) is relatively "clean" from pit marks, etching and precipitates compared with the incubated grains which show a slight increase in small crystal precipitates on the surface (B) and pit marks (C).
Figure 2 ESEM pictures showing water influence on olivine surfaces before and after incubation. An initial olivine grain surface (A) is relatively "clean" from pit marks, etching and precipitates compared with the incubated grains which show a slight increase in small crystal precipitates on the surface (B) and pit marks (C).CC BY · PubMed Central
Figure 3 Accumulation of CH4 (in nmol) in the headspace of the incubation bottles as a function of time. a) is the concentration of CH4 in the bottles containing 2.2 mM bicarbonate buffer and the accumulation rates in mol/m2/s and b) is the concentration of CH4 in the bottles containing only Milli-Q water and the accumulation rates in mol/m2/s. All values are after subtracted control values.
Figure 3 Accumulation of CH4 (in nmol) in the headspace of the incubation bottles as a function of time. a) is the concentration of CH4 in the bottles containing 2.2 mM bicarbonate buffer and the accumulation rates in mol/m2/s and b) is the concentration of CH4 in the bottles containing only Milli-Q water and the accumulation rates in mol/m2/s. All values are after subtracted control values.CC BY · PubMed Central
Figure 4 Concentration of gaseous H2 in the headspace of buffered and Milli-Q water incubation bottles. There is a higher concentration of H2 in bottles with 2.2 mM bicarbonate buffer compared with the Milli-Q water bottles. There is no clear temperature dependence on the accumulated concentrations.
Figure 4 Concentration of gaseous H2 in the headspace of buffered and Milli-Q water incubation bottles. There is a higher concentration of H2 in bottles with 2.2 mM bicarbonate buffer compared with the Milli-Q water bottles. There is no clear temperature dependence on the accumulated concentrations.CC BY · PubMed Central
Figure 5 ICP analyses of elements in solution. Concentration of elements in ppm released into solution after one and two months of incubation as a function of temperature. Mg (a), Ni (b), Fe (c) and Si (d).
Figure 5 ICP analyses of elements in solution. Concentration of elements in ppm released into solution after one and two months of incubation as a function of temperature. Mg (a), Ni (b), Fe (c) and Si (d).CC BY · PubMed Central
Figure 6 Si release into solution (μmol/g olivine) and formed CH4 gas (μmol/g olivine*1000) in the incubation bottle headspace. Random samples of Si from all sample groups were plotted against CH4.
Figure 6 Si release into solution (μmol/g olivine) and formed CH4 gas (μmol/g olivine*1000) in the incubation bottle headspace. Random samples of Si from all sample groups were plotted against CH4.CC BY · PubMed Central

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  1. Horita J, Berndt ME: Abiogenic Methane Formation and Isotopic Fractionation Under Hydrothermal Conditions. Science. 1999, 285: 1055-1057. 10.1126/science.285.5430.1055. · DOI · Paper page

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Metadata

Authors
Neubeck, A., Duc, N. T., Bastviken, D., Crill, P., & Holm, N. G.
Affiliations
  • Stockholm University (SE)
  • Linköping University (SE)
Corresponding author
Neubeck, Anna
ORCID
Venue
Geochemical Transactions
Publisher
Springer Science and Business Media LLC
Published
2011-06-27
Volume
12
Issue
1
Pages
6-6
ISSN
1467-4866 (ISSN-L)
DOI
10.1186/1467-4866-12-6
PMC
PMC3157414
OpenAlex
W2169148758
Semantic Scholar
4036500642b0b3f7023fe48f497d2c24ddc2fbfb
Cited by
135
References
43
Citations by year
2026: 20 · 2025: 14 · 2024: 5 · 2023: 9 · 2022: 6 · 2021: 7 · 2020: 9 · 2019: 8 · 2018: 7 · 2017: 4 · 2016: 12 · 2015: 8 · 2014: 8 · 2013: 10 · 2012: 6
FWCI
4.24
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Geochemical Transactions (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DiVA (Linkoping University) (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Vetenskapsrådet (621-2008-2712)
  • Umeå Universitet
  • Stockholms Universitet
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Origins and Evolution of Life
  • Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Geochemistry and Elemental Analysis
  • Physical Sciences › Environmental Science › Environmental Engineering › CO2 Sequestration and Geologic Interactions
Keywords
olivine weathering, methane production, hydrogen formation, abiotic methane, forsterite, silica release, hydrothermal systems, Martian methane, CO2 sequestration, Fischer-Tropsch synthesis, CO2 methanation, water splitting

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