Primitive Helium in Diamonds
- 4 March 1983
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 219 (4588) , 1067-1068
- https://doi.org/10.1126/science.219.4588.1067
Abstract
Thirteen diamond stones from various unspecified mines in South Africa were analyzed for the isotopic ratio of helium-3 to helium-4. Values of the ratio ranged from less than 10 –7 to (3.2 ± 0.25) × 10 –4 . The latter value is higher than the primordial helium-3/helium-4 ratio in meteorites and close to the ratio for solar-type helium. Such extremely high values may represent primitive helium that evolved very little (that is, showed very little increase in radiogenic helium-4) since the formation of the earth.Keywords
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