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Constraints on the presence of post-perovskite in Earth's lowermost mantle from tomographic-geodynamic model comparisons

Koelemeijer, Paula J; Schuberth, Bernhard S A; Davies, D. Rhodri; Deuss, Arwen; Ritsema, Jeroen

Description

Lower mantle tomography models consistently feature an increase in the ratio of shear-wave velocity (VS) to compressional-wave velocity (VP) variations and a negative correlation between shear-wave and bulk-sound velocity (VC) variations. These seismic characteristics, also observed in the recent SP12RTS model, have been interpreted to be indicative of large-scale chemical variations. Other explanations, such as the lower mantle post-perovskite (pPv) phase, which would not require chemical...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
URI: http://hdl.handle.net/1885/157233
Source: Earth and Planetary Science Letters
DOI: 10.1016/j.epsl.2018.04.056

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