Speaker: Dr Sanne Cottaar, University of Cambridge
P-to-s converted phases (or receiver functions) can image velocity jumps in the mantle. The jumps are interpreted to be either phase transitions or compositional boundaries.
Imaged depths and amplitudes of specific phase transitions can tell us about the temperature and composition at depth, although direct interpretation is often challenging.
In this talk I will show observations from anomalous discontinuities caused by the Icelandic and Hawaiian mantle plumes from 200 to 1200 km depth, and give suggestions as to what they might tell us about these plumes.