Hf isotope evidence for pelagic sediments in the source of Hawaiian basalts

被引：246

作者：

Blichert-Toft, J ^{[1
]}

Frey, FA

Albarède, F

机构：

[1] Ecole Normale Super Lyon, F-69364 Lyon 7, France

[2] MIT, Cambridge, MA 02139 USA

来源：

SCIENCE | 1999年 / 285卷 / 5429期

关键词：

D O I：

10.1126/science.285.5429.879

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：

Lead, oxygen, and osmium isotopic ratios measured on Hawaiian basalts can be matched with the isotopic ratios inferred for recycled ancient oceanic crust. High-precision hafnium isotopic data for lavas from several Hawaiian volcanoes identify old pelagic sediments in their source. These observations support the recycling hypothesis, whereby the mantle source of ocean island basalts includes ancient subducted oceanic crust. Hyperbolic lead-hafnium isotopic relations among Hawaiian basalts further indicate that upper mantle material is not involved in the production of hot spot basalts.

引用

页码：879 / 882

页数：4

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