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Cosmic-ray-produced neon and helium in the summit lavas of MauiThe 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.
Document ID
19870043216
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Marti, K.
(California Univ., San Diego La Jolla, CA, United States)
Craig, H.
(California, University La Jolla, United States)
Date Acquired
August 13, 2013
Publication Date
January 22, 1987
Publication Information
Publication: Nature
Volume: 325
ISSN: 0028-0836
Subject Category
Geophysics
Accession Number
87A30490
Funding Number(s)
CONTRACT_GRANT: NAG9-41
CONTRACT_GRANT: NSF EAR-85-192230
Distribution Limits
Public
Copyright
Other

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