Ontology highlight
ABSTRACT:
SUBMITTER: Wu Z
PROVIDER: S-EPMC4115492 | biostudies-literature | 2014 Jul
REPOSITORIES: biostudies-literature
Proceedings of the National Academy of Sciences of the United States of America 20140707 29
Deciphering the origin of seismic velocity heterogeneities in the mantle is crucial to understanding internal structures and processes at work in the Earth. The spin crossover in iron in ferropericlase (Fp), the second most abundant phase in the lower mantle, introduces unfamiliar effects on seismic velocities. First-principles calculations indicate that anticorrelation between shear velocity (VS) and bulk sound velocity (Vφ) in the mantle, usually interpreted as compositional heterogeneity, can ...[more]