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Organic synthesis on Mars by electrochemical reduction of CO<sub>2</sub>
Carnegie Institution for Science, USA.
German Research Centre for Geosciences, Germany; Free University of Berlin, Germany; University of Leeds, UK.
German Research Centre for Geosciences, Germany.
RISE - Research Institutes of Sweden, Bioscience and Materials, Chemistry and Materials.ORCID iD: 0000-0002-4975-6074
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2018 (English)In: Science Advances, Vol. 4, no 10, article id eaat5118Article in journal (Refereed) Published
Abstract [en]

The sources and nature of organic carbon on Mars have been a subject of intense research. Steele et al. (2012) showed that 10 martian meteorites contain macromolecular carbon phases contained within pyroxene- and olivine-hosted melt inclusions. Here, we show that martian meteorites Tissint, Nakhla, and NWA 1950 have an inventory of organic carbon species associated with fluid-mineral reactions that are remarkably consistent with those detected by the Mars Science Laboratory (MSL) mission. We advance the hypothesis that interactions among spinel-group minerals, sulfides, and a brine enable the electrochemical reduction of aqueous CO2 to organic molecules. Although documented here in martian samples, a similar process likely occurs wherever igneous rocks containing spinel-group minerals and/or sulfides encounter brines.

Place, publisher, year, edition, pages
2018. Vol. 4, no 10, article id eaat5118
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Natural Sciences
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URN: urn:nbn:se:ri:diva-36375DOI: 10.1126/sciadv.aat5118Scopus ID: 2-s2.0-85055869978OAI: oai:DiVA.org:ri-36375DiVA, id: diva2:1266227
Available from: 2018-11-27 Created: 2018-11-27 Last updated: 2019-01-10Bibliographically approved

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Siljeström, Sandra

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