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Oxidation of manganese in an ancient aquifer, Kimberley formation, Gale crater, Mars
Los Alamos National Laboratory.
Los Alamos National Laboratory, Space Remote Sensing, Los Alamos National Laboratory, Los Alamos, International Space and Response Division, Los Alamos National Laboratory.
Washington University, St. Louis.
Space Science Institute, Boulder, Colorado, Space Science Institute.
Vise andre og tillknytning
Rekke forfattare: 442016 (engelsk)Inngår i: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 43, nr 14, s. 7398-7407Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The Curiosity rover observed high Mn abundances (>25wt % MnO) in fracture-filling materials that crosscut sandstones in the Kimberley region of Gale crater, Mars. The correlation between Mn and trace metal abundances plus the lack of correlation between Mn and elements such as S, Cl, and C, reveals that these deposits are Mn oxides rather than evaporites or other salts. On Earth, environments that concentrate Mn and deposit Mn minerals require water and highly oxidizing conditions; hence, these findings suggest that similar processes occurred on Mars. Based on the strong association between Mn-oxide deposition and evolving atmospheric dioxygen levels on Earth, the presence of these Mn phases on Mars suggests that there was more abundant molecular oxygen within the atmosphere and some groundwaters of ancient Mars than in the present day

sted, utgiver, år, opplag, sider
2016. Vol. 43, nr 14, s. 7398-7407
HSV kategori
Forskningsprogram
Atmosfärsvetenskap
Identifikatorer
URN: urn:nbn:se:ltu:diva-11932DOI: 10.1002/2016GL069109ISI: 000383290200015Scopus ID: 2-s2.0-84978477020Lokal ID: af668770-5513-42d8-8626-a5280d62d2a6OAI: oai:DiVA.org:ltu-11932DiVA, id: diva2:984882
Merknad

Validerad; 2016; Nivå 2; 20160817 (andbra)

Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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