Excess 129Xe and high 3He/4He ratios in olivine phenocrysts of Kapuho lava and xenolithic dunites from Hawaii

Details Excess 129Xe and high 3He/4He ratios in olivine phenocrysts of Kapuho lava and xenolithic dunites from Hawaii Excess 129Xe and high 3He/4He ratios in olivine phenocrysts of Kapuho lava and xenolithic dunites from Hawaii

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978e%26psl..39..382k&link_type=abstract

Earth and Planetary Science Letters, Volume 39, Issue 3, p. 382-386.

Physics

14

Scientific paper

The occurrence of excess 129Xe and a higher 3He/4He ratio than that of the atmosphere has been confirmed in olivine phenocrysts of Kapuho lava, Kilauea, and Hualalai xenolithic dunites with CO2 inclusions from Hawaii. The 3He/4He ratio observed in dunites is similar to those of submarine pillow basalts, whereas that of olivine phenocrysts is higher than the former. This may be related to the different characteristics of their sources with respect to rare gas isotopes. Normalized to 36Ar, Ne is depleted in olivine phenocrysts and enriched in dunites, whereas Xe is more enriched in both samples than in the atmosphere.

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