Constraints on Primordial Heterogeneity Preservation in the Lower Mantle and Implications for Global-Scale Mantle Dynamics

Anna J. P. Gülcher1, Maxim Ballmer1,2 and Paul J Tackley1, (1)ETH Zürich, Department of Earth Sciences, Zürich, Switzerland, (2)University College London, Dept. Earth Sciences, London, United Kingdom