Sound Velocities and Equation of State of Iron-Rich (Mg,Fe)O

Author: Wicks, June Ki

Year: 2013

Degree: Dissertation (Ph.D.)

Advisor: Jackson, Jennifer M.

Committee Members: Rossman, George Robert; Gurnis, Michael C.; Asimow, Paul David; Jackson, Jennifer M.

Option: Geochemistry

DOI: 10.7907/Z94B2Z98

Abstract

Ultralow-velocity zones (ULVZs) are small structures at the base of the mantle characterized by sound velocities up to 30% lower than those of surrounding mantle. In this thesis, we propose that iron-rich (Mg,Fe)O plays a key role in the observed sound velocities, and argue that chemically distinct, iron-enriched structures are consistent with both the low sound velocities and the measured shapes of ULVZs.

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• Wicks_chapter1.pdf (application/pdf)
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• Wicks_appendix.pdf (application/pdf)
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