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dc.contributor.authorSafi, E
dc.contributor.authorTelling, J
dc.contributor.authorParnell, J
dc.contributor.authorChojnacki, M
dc.contributor.authorPatel, M R
dc.contributor.authorRealff, J
dc.contributor.authorBlamey, N J F
dc.contributor.authorPayler, S
dc.contributor.authorCockell, C S
dc.contributor.authorDavies, L
dc.contributor.authorBoothroyd, I M
dc.contributor.authorWorrall, F
dc.contributor.authorWadham, J L
dc.date.accessioned2019-07-27T00:36:14Z
dc.date.available2019-07-27T00:36:14Z
dc.date.issued2019-06-03
dc.identifier.citationSafi, E., Telling, J., Parnell, J., Chojnacki, M., Patel, M. R., Realff, J., ... & Boothroyd, I. M. (2019). Aeolian abrasion of rocks as a mechanism to produce methane in the Martian atmosphere. Scientific reports, 9(1), 8229.en_US
dc.identifier.issn2045-2322
dc.identifier.pmid31160623
dc.identifier.doi10.1038/s41598-019-44616-2
dc.identifier.urihttp://hdl.handle.net/10150/633549
dc.description.abstractSeasonal 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.en_US
dc.description.sponsorshipUK Space Agency Aurora grant [ST/R001421/1]; NASA MDAP Grant [NNH14ZDA001N]en_US
dc.language.isoenen_US
dc.publisherNATURE PUBLISHING GROUPen_US
dc.rights© The Author(s) 2019. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleAeolian abrasion of rocks as a mechanism to produce methane in the Martian atmosphereen_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Lunar & Planetary Laben_US
dc.identifier.journalSCIENTIFIC REPORTSen_US
dc.description.noteOpen access journalen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleScientific reports
refterms.dateFOA2019-07-27T00:36:15Z


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© The Author(s) 2019. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License.
Except where otherwise noted, this item's license is described as © The Author(s) 2019. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License.