Cosmic-ray exposure age and pre-atmospheric size of the iron meteorite Unter-Maessing

Details Cosmic-ray exposure age and pre-atmospheric size of the iron meteorite Unter-Maessing Cosmic-ray exposure age and pre-atmospheric size of the iron meteorite Unter-Maessing

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980znata..35...50v&link_type=abstract

Zeitschrift für Naturforschung, Teil a, vol. 35a, Jan. 1980, p. 50-56. In German.

Computer Science

Cosmic Rays, Iron Meteorites, Nuclides, Rare Gases, Meteorite Craters, Potassium Isotopes, Time Response

Scientific paper

The cosmic-ray produced rare gas nuclides and the isotopic composition were measured in a sample from the iron meteorite Unter-Maessing. Unusually high concentrations of the rare gas nuclides were found; accordingly, an unusually high exposure age of about 1400 Ma was determined by the K-41/K-40 method. In addition, the pre-atmospheric size of the meteorite is estimated to have been about 2000 kg. According to this size estimation Unter-Maessing cannot be a fragment broken off from the impact projectile of the Noerdlinger Ries crater either in the atmosphere at high altitudes or at the explosive impact event

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