Primitive helium in diamonds

Details Primitive helium in diamonds Primitive helium in diamonds

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983sci...219.1067o&link_type=abstract

Science, vol. 219, Mar. 4, 1983, p. 1067, 1068.

Computer Science

22

Atmospheric Composition, Diamonds, Earth Mantle, Helium Isotopes, Primitive Earth Atmosphere, Abundance, Mass Spectroscopy, Planetary Evolution

Scientific paper

He-3/He-4 isotopic ratio analyses of 13 diamond stones from unspecified mines in South Africa yield values ranging from less than 10 to the -7th to 0.00032 + or - 0.000025. The latter value is higher than the primordial He-3/He-4 ratio in meteorites, and close to the ratio for solar type He. It is suggested that these elevated values may represent primitive He which has evolved little, in view of its minute increase in radiogenic He-4, since the earth's formation.

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