Water and the Oxidation State of Subduction Zone Magmas-Reference-Cited by-同舟云学术

Water and the Oxidation State of Subduction Zone Magmas

Published:2009-07-31 Issue:5940 Volume:325 Page:605-607
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Kelley Katherine A.¹,Cottrell Elizabeth²

Affiliation:

1. Graduate School of Oceanography, University of Rhode Island, Narragansett, RI 02882, USA.

2. National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA.

Abstract

Tracing Mantle Oxidation The chemical composition of the Earth's mantle varies with tectonic setting. For example, basaltic melts near subduction zones are more oxidized than magma near divergent plate boundaries. Kelley and Cottrell (p. 605 ; see the Perspective by

Hirschmann

) examined melts formed in different tectonic environments, using highly sensitive synchrotron-based analytical methods. The oxidation state of Fe increased with water content and mobile trace elements concentrations. Thus, fluids released from wet subducting plates drive mantle oxidation above subduction zones, which may help to explain the spatial differences in oxygen fugacity of the mantle.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference29 articles.

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