Cosmic-ray-produced neon and helium in the summit lavas of Maui

Details Cosmic-ray-produced neon and helium in the summit lavas of Maui Cosmic-ray-produced neon and helium in the summit lavas of Maui

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.325..335m&link_type=abstract

Nature (ISSN 0028-0836), vol. 325, Jan. 22, 1987, p. 335-337.

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Applications

26

Abundance, Cosmic Rays, Helium Isotopes, Lava, Neon, Data Correlation, Olivine, Pyroxenes, Spallation, Vacuum Apparatus

Scientific paper

The identification of cosmic-ray-produced Ne-21c in addition to He-3c, components attributed to cosmic ray-induced spallation reactions, are reported in gases extracted by fusion of olivines and clinopyroxenes after vacuum-crushing. The observed (He-3/Ne-21)c ratios and the ratio of Ne-21c in olivine to that in clinopyroxene are consistent with an in situ origin of He-3c and Ne-21c by cosmic-ray spallation reactions. These components could be important for interpreting helium isotopic data in terrestrial reservoirs. Geophysical applications could include determinations of erosion rates and exposure histories of terrestrial rocks.

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