Table 2 Partition coefficients used for modeling trace element fractionations between minerals and magmas in the upper and lower mantle.

The initial concentration of elements in the magma ocean is given by C0 (27). ppmw, parts per million by weight.

LuHfZrNd
C0 (ppmw)0.0640.198.260.81
Bridgmanite*0.731.31.380.016
Ferropericlase0.110.0760.150.036
Ca perovskite*111.31.622
Upper mantle0.120.0350.0330.031

*Corgne et al. (25).

†Walter et al. (27).

‡Workman and Hart (68).