Rare gas isotopes in Hawaiian ultramafic nodules and volcanic rocks: constraint on genetic relationships
Kaneoka I and Takaoka N. 1980. Rare gas isotopes in Hawaiian ultramafic nodules and volcanic rocks: constraint on genetic relationships. Science. 208(4450):1366-1368
Differences in the rare gas isotopic ratios especially the ratios of helium-3 to helium-4 and of argon-40 to argon-36 in Hawaiian ultramafic nodules and phenocrysts in volcanic rocks indicate that the nodules and phenocrysts were derived from different sources. The isotopic ratios in ultramafic nodules are similar to those in oceanic tholeiites. The phenocrysts seem to have formed in equilibrium with source materials richer in primordial components than those of the oceanic tholeiites. Mixing between the sources is quite likely.
- Type
- Journal Article
- Authors
- Kaneoka, I; Takaoka, N
- Units
- HALE , HAVO
- Keywords
- Argon (Ar), Chemical Analysis, Clinopyroxene, East Maui Volcano, Geochemistry, Haleakala Volcano, Helium (He), Honolulu Volcanic Series, Isotopes, Krypton (Kr), Mantle, Mineral, Neon (Ne), Oahu, Olivine, Salt Lake, Source, Xenolith, Xenon (Xe)