TY - JOUR
T1 - The imprint of atmospheric evolution in the D/H of Hesperian clay minerals on Mars
AU - Mahaffy, P.R.
AU - Webster, C.R.
AU - Stern, J.C.
AU - Brunner, A.E.
AU - Atreya, S.K.
AU - Conrad, P.G.
AU - Domagal-Goldman, S.
AU - Eigenbrode, J.L.
AU - Flesch, Gregory J.
AU - Christensen, Lance E.
AU - Franz, H.B.
AU - Freissinet, C.
AU - Glavin, D.P.
AU - Grotzinger, John P.
AU - Jones, J.H.
AU - Leshin, L.A.
AU - Malespin, Charles A.
AU - McAdam, A.C.
AU - Ming, D.W.
AU - Navarro-Gonzalez, Rafael
AU - Niles, P.B.
AU - Owen, Tobias
AU - Pavlov, A.A.
AU - Steele, Andrew
AU - Trainer, M.G.
AU - Williford, K.H.
AU - Wray, J.J.
AU - Martin-Torres, Javier
AU - MSL Science Team
N1 - Godkänd; 2015; Bibliografisk uppgift: Javier Martin-Torres ingår i MSL Sci Team.; 20150227 (javmar)
2019-05-14T12:22:20.306+02:00
PY - 2015/1/23
Y1 - 2015/1/23
N2 - 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.
AB - 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.
U2 - 10.1126/science.1260291
DO - 10.1126/science.1260291
M3 - Article
SN - 0036-8075
VL - 347
SP - 412
EP - 414
JO - Science
JF - Science
IS - 6220
ER -