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Water on Mars: Clues from Deuterium/Hydrogen and Water Contents of Hydrous Phases in SNC Meteorites

Watson, Laurie Leshin and Hutcheon, Ian D. and Epstein, Samuel and Stolper, Edward M. (1994) Water on Mars: Clues from Deuterium/Hydrogen and Water Contents of Hydrous Phases in SNC Meteorites. Science, 265 (5168). pp. 86-90. ISSN 0036-8075. http://resolver.caltech.edu/CaltechAUTHORS:20120820-145752100

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Abstract

Ion microprobe studies of hydrous amphibole, biotite, and apatite in shergottite-nakhlite-chassignite (SNC) meteorites, probable igneous rocks from Mars, indicate high deuterium/hydrogen (D/H) ratios relative to terrestrial values. The amphiboles contain roughly one-tentn as much water as expected, suggesting that SNC magmas were less hydrous than previously proposed. The high but variable D/H values of these minerals are best explained by postcrystallization D enrichment of initially D-poor phases by martian crustal fluids with near atmospheric D/H (about five times the terrestrial value). These igneous phases do not directly reflect the D/H ratios of martian "magmatic" water but provide evidence for a D-enriched martian crustal water reservoir.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1126/science.265.5168.86 DOIArticle
http://www.sciencemag.org/content/265/5168/86PublisherArticle
http://www.jstor.org/stable/2884366JSTORArticle
ORCID:
AuthorORCID
Stolper, Edward M.0000-0001-8008-8804
Additional Information:© 1994 American Association for the Advancement of Science. Received 14 February 1994; accepted 16 May 1994. We thank A. Kennedy, G. Huss, E. Deloule, and A. Fahey for assistance with the ion microprobe; D. Stevenson for his time and effort on our behalf; G. Wasserburg for use of the ion microprobe; M. Johnson for sharing notes on kaersutite locations; T. McCoy for bringing two of the studied samples to our attention, for photos, and for advice; P. Carpenter for scanning electron microscope and electron microprobe assistance; M. Baker, B. McInnes, and J. Beckett for help with standard glass synthesis; and J. Beckett and N. Evans for comments on the manuscript. Perceptive reviews from H. McSween Jr. and an anonymous reviewer are greatly appreciated. We also thank the following for providing samples for this study: A. Brearley, University of New Mexico (UNM 991); K. Keil, University of Hawaii (UH 106 and UH 234); G. MacPherson, Smithsonian Institution (USNM 624-1 and USNM 321-1); A. Montana, University of California, Los Angeles (terrestrial amphiboles and biotites); and L. Silver, California Institute of Technology (Pacoima Canyon apatite). Supported by National Aeronautics and Space Administration (NASA) Graduate Student Research Program grant NGT 50800, NASA grants NAG 9-105 and NAGW 3533 (E.M.S.), NAG 9-46 and NAGW 3329 (S.E.), and NAGW 3297 (G. J. Wasserburg), and contribution 5377 (852), Division of Geological and Planetary Sciences, California Institute of Technology.
Funders:
Funding AgencyGrant Number
NASA Graduate Student Research FellowshipNGT 50800
NASANAG 9-105
NASANAGW 3533
NASANAG 9-46
NASANAGW 3329
NASANAGW 3297
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Geological and Planetary Sciences5377
Lunatic Asylum852
Record Number:CaltechAUTHORS:20120820-145752100
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20120820-145752100
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:33372
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:28 Aug 2012 21:27
Last Modified:09 Dec 2016 20:06

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