Computer Science
Scientific paper
Jul 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978e%26psl..40..187h&link_type=abstract
Earth and Planetary Science Letters, vol. 40, no. 2, July 1978, p. 187-193.
Computer Science
2
Antarctic Regions, Cosmic Gases, Meteoritic Composition, Stony Meteorites, Ureilites, Abundance, Chemical Analysis, Chemical Composition, Concentration (Composition), Cosmology, Isotopes, Mass Spectrometers, Neon, Radioactive Decay, Rare Gases, Rare Gases, Antarctic Meteorites, Meteorites, Neon, Havero Meteorite, Yamato Metorites, Kenna Meteorite, Achnodrites, Helium, Petrology, Chemical Composition, Isotopic Composition
Scientific paper
The rare gases He, Ne, Ar, Kr and Xe were measured in bulk samples of Yamato 74123. The He-3 and Ne-21 exposure ages are found to be 5.50 Ma and 2.83 Ma, respectively. In addition to the cosmogenic component the samples contain primordial rare gases of the fractionated type in amounts typical of ureilites. In a three-isotope plot neon turns out to be a mixture of planetary neon and cosmogenic neon. The elements Na, Mg, Al, Si, P, S, K, Ca, Cr, Mn, Fe, Co, and Ni have been determined by spark source mass spectrometry in Yamato 74123 and for comparison in the ureilites Havero and Kenna. The chemical composition as well as the noble gas abundance pattern identify Yamato 74123 as an ureilite.
Braun Oleg
Christ Peter
Hintenberger Heinrich
Jochum Klaus Peter
Martin William
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