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The imprint of atmospheric evolution in the D/H of Hesperian clay minerals on Mars
Planetary Environments Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland, NASA Goddard Space Flight Center.
Jet Propulsion Laboratory, California Institute of Technology, Pasadena.
Planetary Environments Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland, NASA Goddard Space Flight Center.
Planetary Environments Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland.
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Number of Authors: 292015 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 347, no 6220, p. 412-414Article in journal (Refereed) Published
Abstract [en]

The deuterium-to-hydrogen (D/H) ratio in strongly bound water or hydroxyl groups in ancient martian clays retains the imprint of the water of formation of these minerals. Curiosity’s Sample Analysis at Mars (SAM) experiment measured thermally evolved water and hydrogen gas released between 550° and 950°C from samples of Hesperian-era Gale crater smectite to determine this isotope ratio. The D/H value is 3.0 (±0.2) times the ratio in standard mean ocean water. The D/H ratio in this ~3-billion-year-old mudstone, which is half that of the present martian atmosphere but substantially higher than that expected in very early Mars, indicates an extended history of hydrogen escape and desiccation of the planet.

Place, publisher, year, edition, pages
2015. Vol. 347, no 6220, p. 412-414
National Category
Aerospace Engineering
Research subject
Atmospheric science
Identifiers
URN: urn:nbn:se:ltu:diva-10293DOI: 10.1126/science.1260291ISI: 000348225800040Scopus ID: 2-s2.0-84921710917Local ID: 916cec8f-916d-40aa-8bc8-8e288b43e2fcOAI: oai:DiVA.org:ltu-10293DiVA, id: diva2:983235
Note

Godkänd; 2015; Bibliografisk uppgift: Javier Martin-Torres ingår i MSL Sci Team.; 20150227 (javmar)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2019-05-14Bibliographically approved

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