Figure 4
Required ΔX/(Mg + Fe + Si + Al) (X = Fe or Al) to explain the velocity anomaly of +1% for VB and −1% for VS with temperature difference ΔT.
Solid and open circles are for Fe and Al, respectively. With increasing ΔT, required ΔFe and ΔAl increases and decreases respectively. When ΔT is around 110 K, the velocity anomaly can be explained only with ΔFe and the distribution of Al should be uniform.
