Helium, neon and argon in separated phases of iron meteorites

Details Helium, neon and argon in separated phases of iron meteorites Helium, neon and argon in separated phases of iron meteorites

Jan 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971gecoa..35...77s&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 35, Issue 1, pp.77-88

Computer Science

2

Scientific paper

The isotopic composition and concentration of He, Ne and Ar produced by cosmic rays were measured spectrometrically in bulk samples and in taenite and schreibersite phases of 4 iron meteorites. The 3 He concentrations in taenite are lower than those in either schreibersite or bulk samples. This difference cannot be attributed solely to variations in chemical composition and is contradictory to observations of hydrogen diffusion in kamacite and taenite. The 4 He, neon and argon concentrations in taenite fit the spallation systematics for iron meteorites well. Furthermore, calculations of the concentrations (based on the Rudstam spallation model) agree well with the observed data. Thus, we conclude that no fragmentation processes with anomalous cross sections occur in the production of neon from phosphorus.

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