Figure 4.

Dependence of final volatile composition of the bulk silicate Earth (BSE) on the accreting conditions. (a) Effects of the impactor’s size distribution. P2-G1-L3 (the nominal model, red line): planetesimal accretion ($q=2$ and $q=3$ for in the main and late accretion stages, respectively) and one giant impact. G10-L3 (orange line): ten giant impacts and the late accretion of planetesimals . P2-G1-L2 (blue line): shallower planetesimal size distribution ($q=2$ throughout the full accretion) and one giant impact. Here we assumed $\mathrm{d}N/\mathrm{d}D\propto D^{-q}$, where N(D) is the number of objects of diameter smaller than D, and q is the power law index. (b) Dependence on volatile accretion scenarios. Late volatile accretion (dark-purple): volatiles are delivered only by late accretion with CI chondrite-like bodies. Heterogeneous accretion model (purple): volatiles are supplied in the last 30 wt% accretion with CI chondrite-like bodies. (c) Dependence on the late accretion mass. The mass of late accretion was varied from 0.5 wt% (brown) to 2.5 wt% (orange). (d) Dependence on the redox state of the magma ocean. Oxidized (the nominal model, red line), intermediate (light blue line), and reduced (blue line) conditions are compared. The solubilities and partitioning coefficients are summarised in Table 1.