Journal article

The effect of alumina on phase transformations at the 660-kilometer discontinuity from Fe-Mg partitioning experiments

Abstract:: Experimental data on the partitioning of Fe and Mg between coexisting silicate perovskite, magnesiowustite, and γ-(Mg,Fe)2SiO4 demonstrate that Fe substitution in perovskite is strongly coupled to Al2O3 concentration. In Al2O3-free compositions, perovskite has a low Fe/(Fe+Mg) ratio: for a bulk Fe/(Fe+Mg) of 0.11, perovskite has a value close to 0.04, whereas magnesiowustite has a ratio near 0.17. In peridotitic mantle, however, where the perovskite should contain 4 to 5 weight percent Al2O3, it has essentially the same Fe/(Fe+Mg) ratio as coexisting magnesiowustite. Under lower mantle conditions, therefore, perovskite and magnesiowustite should, in peridotite, each have an Fe/(Fe+Mg) ratio close to 0.11.

Publication status:: Published

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APA Style

Wood, B., & Rubie, D. (1996). The effect of alumina on phase transformations at the 660-kilometer discontinuity from Fe-Mg partitioning experiments. SCIENCE, 273(5281), 1522–1524.

MLA Style

Wood, B., and D. Rubie. “The Effect of Alumina on Phase Transformations at the 660-Kilometer Discontinuity from Fe-Mg Partitioning Experiments.” SCIENCE, vol. 273, no. 5281, 1996, pp. 1522–24.

Chicago Style

Wood, B, and D Rubie. 1996. “The Effect of Alumina on Phase Transformations at the 660-Kilometer Discontinuity from Fe-Mg Partitioning Experiments.” SCIENCE 273 (5281): 1522–24.
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Publisher copy:: 10.1126/science.273.5281.1522

Authors

+ Wood, B More by this author

Institution:: University of Oxford
Division:: MPLS
Department:: Earth Sciences
Role:: Author

+ Rubie, D More by this author

Role:: Author

Journal:: SCIENCE More from this journal
Volume:: 273
Issue:: 5281
Pages:: 1522-1524
Publication date:: 1996-09-13
DOI:: 10.1126/science.273.5281.1522
EISSN:: 1095-9203
ISSN:: 0036-8075

Language:: English
Pubs id:: pubs:163818
UUID:: uuid:a3a33fb4-bbb9-4d89-b80d-cf35a1778aac
Local pid:: pubs:163818
Source identifiers:: 163818
Deposit date:: 2012-12-19

Terms of use

Copyright date:: 1996

Licence:: Terms and Conditions of Use for Oxford University Research Archive

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