Aeolian abrasion of rocks as a mechanism to produce methane in the Martian atmosphere

E. Safi, J. Telling (Corresponding Author), J. Parnell, M. Chojnacki, M. R. Patel, J. Realff, N. J. F. Blamey, S. Payler, C. S. Cockell, L. Davies, I. M. Boothroyd, F. Worrall, J. L. Wadham

Research output: Contribution to journalArticle

Abstract

Seasonal changes in methane background levels and methane spikes have been detected in situ a metre above the Martian surface, and larger methane plumes detected via ground-based remote sensing, however their origin have not yet been adequately explained. Proposed methane sources include the UV irradiation of meteoritic-derived organic matter, hydrothermal reactions with olivine, organic breakdown via meteoroid impact, release from gas hydrates, biological production, or the release of methane from fluid inclusions in basalt during aeolian erosion. Here we quantify for the first time the potential importance of aeolian abrasion as a mechanism for releasing trapped methane from within rocks, by coupling estimates of present day surface wind abrasion with the methane contents of a variety of Martian meteorites, analogue terrestrial basalts and analogue terrestrial sedimentary rocks. We demonstrate that the abrasion of basalt under present day Martian rates of aeolian erosion is highly unlikely to produce detectable changes in methane concentrations in the atmosphere. We further show that, although there is a greater potential for methane production from the aeolian abrasion of certain sedimentary rocks, to produce the magnitude of methane concentrations analysed by the Curiosity rover they would have to contain methane in similar concentrations as economic reserved of biogenic/thermogenic deposits on Earth. Therefore we suggest that aeolian abrasion is an unlikely origin of the methane detected in the Martian atmosphere, and that other methane sources are required.
Original languageEnglish
Article number8229
Number of pages7
JournalScientific Reports
Volume9
Issue number1
DOIs
Publication statusPublished - 3 Jun 2019

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Martian atmosphere
abrasion
methane
rock
basalt
sedimentary rock
biogenic deposit
erosion
Martian meteorite
biological production
gas hydrate
background level
surface wind
fluid inclusion
olivine
irradiation

Cite this

Safi, E., Telling, J., Parnell, J., Chojnacki, M., Patel, M. R., Realff, J., ... Wadham, J. L. (2019). Aeolian abrasion of rocks as a mechanism to produce methane in the Martian atmosphere. Scientific Reports, 9(1), [8229 ]. https://doi.org/10.1038/s41598-019-44616-2

Aeolian abrasion of rocks as a mechanism to produce methane in the Martian atmosphere. / Safi, E.; Telling, J. (Corresponding Author); Parnell, J.; Chojnacki, M.; Patel, M. R.; Realff, J.; Blamey, N. J. F.; Payler, S.; Cockell, C. S.; Davies, L.; Boothroyd, I. M.; Worrall, F.; Wadham, J. L.

In: Scientific Reports, Vol. 9, No. 1, 8229 , 03.06.2019.

Research output: Contribution to journalArticle

Safi, E, Telling, J, Parnell, J, Chojnacki, M, Patel, MR, Realff, J, Blamey, NJF, Payler, S, Cockell, CS, Davies, L, Boothroyd, IM, Worrall, F & Wadham, JL 2019, 'Aeolian abrasion of rocks as a mechanism to produce methane in the Martian atmosphere', Scientific Reports, vol. 9, no. 1, 8229 . https://doi.org/10.1038/s41598-019-44616-2
Safi, E. ; Telling, J. ; Parnell, J. ; Chojnacki, M. ; Patel, M. R. ; Realff, J. ; Blamey, N. J. F. ; Payler, S. ; Cockell, C. S. ; Davies, L. ; Boothroyd, I. M. ; Worrall, F. ; Wadham, J. L. / Aeolian abrasion of rocks as a mechanism to produce methane in the Martian atmosphere. In: Scientific Reports. 2019 ; Vol. 9, No. 1.
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title = "Aeolian abrasion of rocks as a mechanism to produce methane in the Martian atmosphere",
abstract = "Seasonal changes in methane background levels and methane spikes have been detected in situ a metre above the Martian surface, and larger methane plumes detected via ground-based remote sensing, however their origin have not yet been adequately explained. Proposed methane sources include the UV irradiation of meteoritic-derived organic matter, hydrothermal reactions with olivine, organic breakdown via meteoroid impact, release from gas hydrates, biological production, or the release of methane from fluid inclusions in basalt during aeolian erosion. Here we quantify for the first time the potential importance of aeolian abrasion as a mechanism for releasing trapped methane from within rocks, by coupling estimates of present day surface wind abrasion with the methane contents of a variety of Martian meteorites, analogue terrestrial basalts and analogue terrestrial sedimentary rocks. We demonstrate that the abrasion of basalt under present day Martian rates of aeolian erosion is highly unlikely to produce detectable changes in methane concentrations in the atmosphere. We further show that, although there is a greater potential for methane production from the aeolian abrasion of certain sedimentary rocks, to produce the magnitude of methane concentrations analysed by the Curiosity rover they would have to contain methane in similar concentrations as economic reserved of biogenic/thermogenic deposits on Earth. Therefore we suggest that aeolian abrasion is an unlikely origin of the methane detected in the Martian atmosphere, and that other methane sources are required.",
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note = "Acknowledgements We thank the anonymous referees and Liz Rampe for their thorough reading of the paper, and for making comments that have helped to clarify and improve the text. The authors acknowledge financial support from UK Space Agency Aurora grant ST/R001421/1 (to J.T.). The authors also thank Cleveland Potash and ICL for their logistical support aid in sampling. M.C would like to thank support from NASA MDAP Grant NNH14ZDA001N.",
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T1 - Aeolian abrasion of rocks as a mechanism to produce methane in the Martian atmosphere

AU - Safi, E.

AU - Telling, J.

AU - Parnell, J.

AU - Chojnacki, M.

AU - Patel, M. R.

AU - Realff, J.

AU - Blamey, N. J. F.

AU - Payler, S.

AU - Cockell, C. S.

AU - Davies, L.

AU - Boothroyd, I. M.

AU - Worrall, F.

AU - Wadham, J. L.

N1 - Acknowledgements We thank the anonymous referees and Liz Rampe for their thorough reading of the paper, and for making comments that have helped to clarify and improve the text. The authors acknowledge financial support from UK Space Agency Aurora grant ST/R001421/1 (to J.T.). The authors also thank Cleveland Potash and ICL for their logistical support aid in sampling. M.C would like to thank support from NASA MDAP Grant NNH14ZDA001N.

PY - 2019/6/3

Y1 - 2019/6/3

N2 - Seasonal changes in methane background levels and methane spikes have been detected in situ a metre above the Martian surface, and larger methane plumes detected via ground-based remote sensing, however their origin have not yet been adequately explained. Proposed methane sources include the UV irradiation of meteoritic-derived organic matter, hydrothermal reactions with olivine, organic breakdown via meteoroid impact, release from gas hydrates, biological production, or the release of methane from fluid inclusions in basalt during aeolian erosion. Here we quantify for the first time the potential importance of aeolian abrasion as a mechanism for releasing trapped methane from within rocks, by coupling estimates of present day surface wind abrasion with the methane contents of a variety of Martian meteorites, analogue terrestrial basalts and analogue terrestrial sedimentary rocks. We demonstrate that the abrasion of basalt under present day Martian rates of aeolian erosion is highly unlikely to produce detectable changes in methane concentrations in the atmosphere. We further show that, although there is a greater potential for methane production from the aeolian abrasion of certain sedimentary rocks, to produce the magnitude of methane concentrations analysed by the Curiosity rover they would have to contain methane in similar concentrations as economic reserved of biogenic/thermogenic deposits on Earth. Therefore we suggest that aeolian abrasion is an unlikely origin of the methane detected in the Martian atmosphere, and that other methane sources are required.

AB - Seasonal changes in methane background levels and methane spikes have been detected in situ a metre above the Martian surface, and larger methane plumes detected via ground-based remote sensing, however their origin have not yet been adequately explained. Proposed methane sources include the UV irradiation of meteoritic-derived organic matter, hydrothermal reactions with olivine, organic breakdown via meteoroid impact, release from gas hydrates, biological production, or the release of methane from fluid inclusions in basalt during aeolian erosion. Here we quantify for the first time the potential importance of aeolian abrasion as a mechanism for releasing trapped methane from within rocks, by coupling estimates of present day surface wind abrasion with the methane contents of a variety of Martian meteorites, analogue terrestrial basalts and analogue terrestrial sedimentary rocks. We demonstrate that the abrasion of basalt under present day Martian rates of aeolian erosion is highly unlikely to produce detectable changes in methane concentrations in the atmosphere. We further show that, although there is a greater potential for methane production from the aeolian abrasion of certain sedimentary rocks, to produce the magnitude of methane concentrations analysed by the Curiosity rover they would have to contain methane in similar concentrations as economic reserved of biogenic/thermogenic deposits on Earth. Therefore we suggest that aeolian abrasion is an unlikely origin of the methane detected in the Martian atmosphere, and that other methane sources are required.

UR - http://www.nature.com/articles/s41598-019-44616-2

UR - http://www.mendeley.com/research/aeolian-abrasion-rocks-mechanism-produce-methane-martian-atmosphere

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DO - 10.1038/s41598-019-44616-2

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VL - 9

JO - Scientific Reports

JF - Scientific Reports

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