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Saal et al. 1998

Saal, A.E., Hart, S.R., Shimizu, N., Hauri, E.H. and Layne, G.D. (1998). Pb isotopic variability in melt inclusions from oceanic island basalts, Polynesia. Science 282(5393): 1,481-1,484.

Previous studies have suggested that melting processes are responsible for the trace element variability observed in olivine-hosted basaltic melt inclusions. Melt inclusions from three individual lava samples (two from Mangaia, Cook Islands, and one from Tahaa, Society Islands) have heterogeneous Pb isotopic compositions, even though the erupted Lavas are isotopically homogeneous, The range of Pb isotopic compositions from individual melt inclusions spans 50 percent of the worldwide range observed for ocean island basalts, The melt inclusion data can be explained by two-component mixing for each island. Our data imply that magmas with different isotopic compositions existed in the volcanic plumbing system before or during melt aggregation.

BACKGROUND DATA FILES

	Abstract

Keywords
south-pacific ocean, mantle plumes, geochemistry, himu, metasomatism, systematics, olivine, hotspot, element, rocks

Journal
Science
http://www.sciencemag.org/

Publisher
American Association for the Advancement of Science
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