Ontology highlight
ABSTRACT:
SUBMITTER: Wang W
PROVIDER: S-EPMC6946644 | biostudies-literature | 2020 Jan
REPOSITORIES: biostudies-literature
Nature communications 20200107 1
Seismic heterogeneities detected in the lower mantle were proposed to be related to subducted oceanic crust. However, the velocity and density of subducted oceanic crust at lower-mantle conditions remain unknown. Here, we report ab initio results for the elastic properties of calcium ferrite-type phases and determine the velocities and density of oceanic crust along different mantle geotherms. We find that the subducted oceanic crust shows a large negative shear velocity anomaly at the phase bou ...[more]