Computer Science
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.349..149h&link_type=abstract
Nature (ISSN 0028-0836), vol. 349, Jan. 10, 1991, p. 149-151.
Computer Science
104
Basalt, Earth Mantle, Helium Isotopes, Isotopic Enrichment, Neon Isotopes, Solar System Evolution, Atmospheric Composition, Geochronology, Hawaii, Isotopic Labeling, Rare Gases, Solar Activity
Scientific paper
Isotope ratios of helium and neon in fresh basaltic glasses dredged from Loihi seamount and the East Rift Zone of Kilauea have been measured in an attempt to identify the contributions of such components. A systematic enrichment in Ne-20 and Ne-21 relative to Ne-22 compared to atmospheric neon has been found. The helium and neon isotope signatures observed in the samples can be explained by mixing of solar, present atmospheric, radiogenic, and nucleogenic components. The data suggest that the noble-gas iosotopic composition of the mantle source of the Hawaiian plume is different from that of the present atmosphere, and that it includes a significant solarlike component. It is inferred that this component was acquired during the formation of the earth.
Clague David A.
Doulgeris Anthony
Honda Masahiko
McDougall Ian
Patterson Desmond B.
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