Pb isotopic variability in melt inclusions from oceanic island basalts, Polynesia

被引：192

作者：

Saal, AE ^{[1
]}

Hart, SR

Shimizu, N

Hauri, EH

Layne, GD

机构：

[1] Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA

[2] Carnegie Inst Washington, Dept Terr Magnetism, Washington, DC 20015 USA

来源：

SCIENCE | 1998年 / 282卷 / 5393期

关键词：

D O I：

10.1126/science.282.5393.1481

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页码：1481 / 1484

页数：4

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