A Quantitative Link Between Recycling and Osmium Isotopes

Recycled subducted ocean crust has been traced by elevated 187Os/188Os in some studies and by high nickel and low manganese contents in others. Here, we show that these tracers are linked for Quaternary lavas of Iceland, strengthening the recycling model. An estimate of the osmium isotopic compositi...

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Bibliographic Details
Published in:Science
Main Authors: Sobolev, Alexander V., Hofmann, Albrecht W., Brügmann, Gerhard, Batanova, Valentina G., Kuzmin, Dmitry V.
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 2008
Subjects:
Iceland
Online Access:http://dx.doi.org/10.1126/science.1158452
https://www.science.org/doi/pdf/10.1126/science.1158452
Description
Summary:Recycled subducted ocean crust has been traced by elevated 187Os/188Os in some studies and by high nickel and low manganese contents in others. Here, we show that these tracers are linked for Quaternary lavas of Iceland, strengthening the recycling model. An estimate of the osmium isotopic composition of both the recycled crust and the mantle peridotite implies that Icelandic Quaternary lavas are derived in part from an ancient crustal component with model ages between 1.1 × 10 9 and 1.8 × 10 9 years and from a peridotitic end-member close to present-day oceanic mantle.

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