The chemical case for Mercury mantle stripping

Progress in Earth and Planetary Science

Table 3 Mercury and Vesta mantle compositions

Oxide	Zolotov ^a	Chabot ^b	Nittler ^c	Vesta ^d
SiO₂	56.90	49.02	52.83	44.47
TiO₂	0.89	1.07	0.22	0.12
Al₂O₃	14.10	11.72	4.41	2.76
FeO	3.42	0	0.03	21.02
MnO	0.69	0	0	0
MgO	17.90	29.84	37.27	28.92
CaO	5.02	8.36	3.05	2.27
Na₂O	0.18	0	1.63	0.08
K₂O	0.15	0	0.04	0.01
S	1.90	–	–	–
log₁₀C_S	− 5.446	− 5.435	− 5.560	− 5.091
\(X^{\text {sil}}_{\text {Si}}\) wt% ^e	26.60	22.91	24.69	20.79
\(X^{\text {met}}_{\text {Si}}\) wt% ^f	28.5	28.5	27.9	–

All oxide values are wt%. ^aMean of Zolotov et al. (2013) northern volcanic plains and intercrater plains compositions; ^bChabot et al. (2014) experimental starting material; ^cNittler et al. (2018) mean estimated mantle composition; ^dAverage of H-chondrite and H+CM chondrite mix (Toplis et al. 2013) and OIM and BD compositions (Lodders 2000). Average Vesta metal composition (wt%): Fe 76.32, Ni 9.63, Co 0.096, S 12.98; ^eMean value is 24.73 wt%; ^fAt 2 wt% S in metal