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Title: Sound velocity and density of magnesiowüstites: Implications for ultralow-velocity zone topography: Sound velocities of Iron-rich Oxides

Abstract

We explore the effect of Mg/Fe substitution on the sound velocities of iron-rich (Mg 1 - xFe x)O, where x = 0.84, 0.94, and 1.0. Sound velocities were determined using nuclear resonance inelastic X-ray scattering as a function of pressure, approaching those of the lowermost mantle. The systematics of cation substitution in the Fe-rich limit has the potential to play an important role in the interpretation of seismic observations of the core-mantle boundary. By determining a relationship between sound velocity, density, and composition of (Mg,Fe)O, this study explores the potential constraints on ultralow-velocity zones at the core-mantle boundary.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [2]; ORCiD logo [3]
  1. Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena CA USA; Department of Geosciences, Princeton University, Princeton NJ USA
  2. Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena CA USA
  3. Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena CA USA; Hawai'i Institute of Geophysics and Planetology, University of Hawai'i at Manoa, 1680 East-West Rd Honolulu HI
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
National Science Foundation (NSF)
OSTI Identifier:
1355031
Resource Type:
Journal Article
Resource Relation:
Journal Name: Geophysical Research Letters; Journal Volume: 44; Journal Issue: (5) ; 03, 2017
Country of Publication:
United States
Language:
ENGLISH
Subject:
58 GEOSCIENCES

Citation Formats

Wicks, June, Jackson, Jennifer M., Sturhahn, Wolfgang, and Zhang, Dongzhou. Sound velocity and density of magnesiowüstites: Implications for ultralow-velocity zone topography: Sound velocities of Iron-rich Oxides. United States: N. p., 2017. Web. doi:10.1002/2016GL071225.
Wicks, June, Jackson, Jennifer M., Sturhahn, Wolfgang, & Zhang, Dongzhou. Sound velocity and density of magnesiowüstites: Implications for ultralow-velocity zone topography: Sound velocities of Iron-rich Oxides. United States. doi:10.1002/2016GL071225.
Wicks, June, Jackson, Jennifer M., Sturhahn, Wolfgang, and Zhang, Dongzhou. Sun . "Sound velocity and density of magnesiowüstites: Implications for ultralow-velocity zone topography: Sound velocities of Iron-rich Oxides". United States. doi:10.1002/2016GL071225.
@article{osti_1355031,
title = {Sound velocity and density of magnesiowüstites: Implications for ultralow-velocity zone topography: Sound velocities of Iron-rich Oxides},
author = {Wicks, June and Jackson, Jennifer M. and Sturhahn, Wolfgang and Zhang, Dongzhou},
abstractNote = {We explore the effect of Mg/Fe substitution on the sound velocities of iron-rich (Mg1 - xFex)O, where x = 0.84, 0.94, and 1.0. Sound velocities were determined using nuclear resonance inelastic X-ray scattering as a function of pressure, approaching those of the lowermost mantle. The systematics of cation substitution in the Fe-rich limit has the potential to play an important role in the interpretation of seismic observations of the core-mantle boundary. By determining a relationship between sound velocity, density, and composition of (Mg,Fe)O, this study explores the potential constraints on ultralow-velocity zones at the core-mantle boundary.},
doi = {10.1002/2016GL071225},
journal = {Geophysical Research Letters},
number = (5) ; 03, 2017,
volume = 44,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2017},
month = {Sun Jan 01 00:00:00 EST 2017}
}