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Noble gases in diamonds - Occurrences of solarlike helium and neon (1987)

Roedder, E. ; Epstein, S. ; Reynolds, J. H. ; [et al.]

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Publication Date: 2019-07-12

Description: Seventeen diamond samples from diverse locations were analyzed for the contents of He, Ar, Kr, and Xe, and of their isotopes, using a Reynolds (1956) type glass mass spectrometer. The results disclosed a large spread in the He-3/He-4 ratios, ranging from values below atmospheric to close to the solar ratio. In particular, solarlike He-3/He-4 ratios were seen for an Australian colorless diamond composite and an Arkansas diamond, which also displayed solarlike neon isotopic ratios. Wide variation was also observed in the He-4/Ar-40 ratios, suggesting a complex history for the source regions and the diamond crystallization processes.

Keywords: GEOPHYSICS

Type: Journal of Geophysical Research (ISSN 0148-0227); 92; 12507-12

Format: text

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