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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
5936
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pubmed:dateCreated |
2009-7-3
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pubmed:abstractText |
The Wet Chemistry Laboratory on the Phoenix Mars Lander performed aqueous chemical analyses of martian soil from the polygon-patterned northern plains of the Vastitas Borealis. The solutions contained approximately 10 mM of dissolved salts with 0.4 to 0.6% perchlorate (ClO4) by mass leached from each sample. The remaining anions included small concentrations of chloride, bicarbonate, and possibly sulfate. Cations were dominated by Mg2+ and Na+, with small contributions from K+ and Ca2+. A moderately alkaline pH of 7.7 +/- 0.5 was measured, consistent with a carbonate-buffered solution. Samples analyzed from the surface and the excavated boundary of the approximately 5-centimeter-deep ice table showed no significant difference in soluble chemistry.
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:chemical |
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pubmed:status |
MEDLINE
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pubmed:month |
Jul
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pubmed:issn |
1095-9203
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pubmed:author |
pubmed-author:BoyntonW VWV,
pubmed-author:CatlingD CDC,
pubmed-author:ClarkB CBC,
pubmed-author:DefloresL PLP,
pubmed-author:GospodinovaKK,
pubmed-author:HechtM HMH,
pubmed-author:HoffmanJJ,
pubmed-author:KapitJJ,
pubmed-author:KounavesS PSP,
pubmed-author:MimsD HDH,
pubmed-author:QuintR IRI,
pubmed-author:SmithP HPH,
pubmed-author:WestS JSJ,
pubmed-author:YoungS M MSM
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pubmed:issnType |
Electronic
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pubmed:day |
3
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pubmed:volume |
325
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
64-7
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pubmed:meshHeading |
pubmed-meshheading:19574385-Anions,
pubmed-meshheading:19574385-Cations,
pubmed-meshheading:19574385-Chemical Phenomena,
pubmed-meshheading:19574385-Extraterrestrial Environment,
pubmed-meshheading:19574385-Hydrogen-Ion Concentration,
pubmed-meshheading:19574385-Mars,
pubmed-meshheading:19574385-Oxidation-Reduction,
pubmed-meshheading:19574385-Perchloric Acid,
pubmed-meshheading:19574385-Solubility,
pubmed-meshheading:19574385-Spacecraft,
pubmed-meshheading:19574385-Temperature,
pubmed-meshheading:19574385-Water
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pubmed:year |
2009
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pubmed:articleTitle |
Detection of perchlorate and the soluble chemistry of martian soil at the Phoenix lander site.
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pubmed:affiliation |
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA. michael.h.hecht@jpl.nasa.gov
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, Non-P.H.S.
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