No ‘nanofossils’ in martian meteorite
نویسندگان
چکیده
منابع مشابه
Carbonates in the Martian meteorite
Despite evidence for liquid water at the surface of Mars during the Noachian epoch, the temperature of early aqueous environments has been impossible to establish, raising questions of whether the surface of Mars was ever warmer than today. We address this problem by determining the precipitation temperature of secondary carbonate minerals preserved in the oldest known sample of Mars’ crust—the...
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A suite of protein and nonprotein amino acids were detected with high-performance liquid chromatography in the water- and acid-soluble components of an interior fragment of the Martian meteorite Nakhla, which fell in Egypt in 1911. Aspartic and glutamic acids, glycine, alanine, beta-alanine, and gamma-amino-n-butyric acid (gamma-ABA) were the most abundant amino acids detected and were found pr...
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Introduction: Martian space probe, Viking landers could not measure Ne isotopic ratios, but only had the concentration of Ne as 2.5 ppm (error +3.5, -1.5) in Martian atmosphere [1]. After that, there have been many efforts to determine Ne isotopic composition of Martian atmosphere, by examining the Martian atmospheric gases trapped in impact glasses of the EET 79001 and other shergottites [2-6]...
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1Planetary Geosciences Institute, Department of Geological Sciences, University of Tennessee, Knoxville, Tennessee 37996-1410, USA 2Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Kosygin St. 19, Moscow 117975, Russia 3Institute of Meteoritics, University of New Mexico, Albuquerque, New Mexico 87131, USA 4Department of Civil Engineering and Geological ...
متن کاملThe origin of organic matter in the Martian meteorite ALH84001.
Stable carbon isotope measurements of the organic matter associated with the carbonate globules and the bulk matrix material in the ALH84001 Martian meteorite indicate that two distinct sources are present in the sample. The delta 13C values for the organic matter associated with the carbonate globules averaged -26% and is attributed to terrestrial contamination. In contrast, the delta 13C valu...
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ژورنال
عنوان ژورنال: Nature
سال: 1997
ISSN: 0028-0836,1476-4687
DOI: 10.1038/37257-c1