Hf Isotope Evidence for Pelagic Sediments in the Source of Hawaiian Basalts-Reference-Cited by-同舟云学术

Hf Isotope Evidence for Pelagic Sediments in the Source of Hawaiian Basalts

Published:1999-08-06 Issue:5429 Volume:285 Page:879-882
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Blichert-Toft J.¹,Frey F. A.²,Albarède F.¹

Affiliation:

1. Ecole Normale Supérieure de Lyon, 69364 Lyon Cedex 7, France.

2. Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

Abstract

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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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