Microanalysis of Melt Pockets within Martian Meteorite DaG 476

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...

New Insights on Martian Atmospheric Neon from Martian Meteorite, Dhofar

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]...

Martian meteorite Dhofar 019: A new shergottite

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 ...

Amino acids in the Martian meteorite Nakhla.

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...

Mechanisms of Formation of Magnetite in Martian Meteorite Alh84001