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dc.contributor.authorNavarro-González, R
dc.contributor.authorNavarro, KF
dc.contributor.authorColl, P
dc.contributor.authorMcKay, CP
dc.contributor.authorStern, JC
dc.contributor.authorSutter, B
dc.contributor.authorArcher, PD
dc.contributor.authorBuch, A
dc.contributor.authorCabane, M
dc.contributor.authorConrad, PG
dc.contributor.authorEigenbrode, JL
dc.contributor.authorFranz, HB
dc.contributor.authorFreissinet, C
dc.contributor.authorGlavin, DP
dc.contributor.authorHogancamp, JV
dc.contributor.authorMcAdam, AC
dc.contributor.authorMalespin, CA
dc.contributor.authorMartín-Torres, FJ
dc.contributor.authorMing, DW
dc.contributor.authorMorris, RV
dc.contributor.authorPrats, B
dc.contributor.authorRaulin, F
dc.contributor.authorRodríguez-Manfredi, JA
dc.contributor.authorSzopa, C
dc.contributor.authorZorzano-Mier, MP
dc.contributor.authorMahaffy, PR
dc.contributor.authorAtreya, S
dc.contributor.authorTrainer, MG
dc.contributor.authorVasavada, AR
dc.date.accessioned2019-12-11T23:56:22Z
dc.date.available2019-12-11T23:56:22Z
dc.date.issued2019
dc.identifier.issn2169-9097
dc.identifier.doi10.1029/2018JE005852
dc.identifier.urihttp://hdl.handle.net/10072/389690
dc.description.abstractMolecular hydrogen (H2) from volcanic emissions is suggested to warm the Martian surface when carbon dioxide (CO2) levels dropped from the Noachian (4100 to 3700 Myr) to the Hesperian (3700 to 3000 Myr). Its presence is expected to shift the conversion of molecular nitrogen (N2) into different forms of fixed nitrogen (N). Here we present experimental data and theoretical calculations that investigate the efficiency of nitrogen fixation by bolide impacts in CO2‐N2 atmospheres with or without H2. Surprisingly, nitric oxide (NO) was produced more efficiently in 20% H2 in spite of being a reducing agent and not likely to increase the rate of nitrogen oxidation. Nevertheless, its presence led to a faster cooling of the shock wave raising the freeze‐out temperature of NO resulting in an enhanced yield. We estimate that the nitrogen fixation rate by bolide impacts varied from 7 × 10−4 to 2 × 10−3 g N·Myr−1·cm−2 and could imply fluvial concentration to explain the nitrogen (1.4 ± 0.7 g N·Myr−1·cm−2) detected as nitrite (NO2−) and nitrate (NO3−) by Curiosity at Yellowknife Bay. One possible explanation is that the nitrogen detected in the lacustrine sediments at Gale was deposited entirely on the crater's surface and was subsequently dissolved and transported by superficial and ground waters to the lake during favorable wet climatic conditions. The nitrogen content sharply decreases in younger sediments of the Murray formation suggesting a decline of H2 in the atmosphere and the rise of oxidizing conditions causing a shortage in the supply to putative microbial life.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherAmerican Geophysical Union (AGU)
dc.relation.ispartofpagefrom94
dc.relation.ispartofpageto113
dc.relation.ispartofissue1
dc.relation.ispartofjournalJournal of Geophysical Research: Planets
dc.relation.ispartofvolume124
dc.subject.fieldofresearchAstronomical and Space Sciences
dc.subject.fieldofresearchGeochemistry
dc.subject.fieldofresearchGeology
dc.subject.fieldofresearchcode0201
dc.subject.fieldofresearchcode0402
dc.subject.fieldofresearchcode0403
dc.titleAbiotic Input of Fixed Nitrogen by Bolide Impacts to Gale Crater During the Hesperian: Insights From the Mars Science Laboratory
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationNavarro-González, R; Navarro, KF; Coll, P; McKay, CP; Stern, JC; Sutter, B; Archer, PD; Buch, A; Cabane, M; Conrad, PG; Eigenbrode, JL; Franz, HB; Freissinet, C; Glavin, DP; Hogancamp, JV; McAdam, AC; Malespin, CA; Martín-Torres, FJ; Ming, DW; Morris, RV; Prats, B; Raulin, F; Rodríguez-Manfredi, JA; Szopa, C; Zorzano-Mier, MP; Mahaffy, PR; Atreya, S; Trainer, MG; Vasavada, AR, Abiotic Input of Fixed Nitrogen by Bolide Impacts to Gale Crater During the Hesperian: Insights From the Mars Science Laboratory, Journal of Geophysical Research: Planets, 2019, 124 (1), pp. 94-113
dcterms.licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.date.updated2019-12-11T23:54:20Z
dc.description.versionVersion of Record (VoR)
gro.rights.copyright© 2018. The Authors. This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
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