The upper mantle geoid: Implications for continental structure and the intraplate stress field
Published:October 01, 2015
David Coblentz, Jolante van Wijk, Randall M. Richardson, Mike Sandiford, 2015. "The upper mantle geoid: Implications for continental structure and the intraplate stress field", The Interdisciplinary Earth: A Volume in Honor of Don L. Anderson, Gillian R. Foulger, Michele Lustrino, Scott D. King
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We use the fact that geoid anomalies are directly related to the local dipole moment of the density-depth distribution to help constrain density variations within the lithosphere and the associated tectonic stresses. The main challenge with this approach is isolating the upper mantle geoid contribution from the full geoid (which is dominated by sources in the lower mantle). We address this issue by using a high-pass spherical harmonic filtering of the EGM2008–WGS 84 geoid to produce an “upper mantle” geoid. The tectonic implications of the upper mantle are discussed in terms of plate tectonics and intraplate stresses. We find that...