Table 9
Formation times and extent of the different reservoirs for planetesimals assuming the liquidus temperature of iron equal to 1700 K (a) and the liquidus temperature of iron equal to 1233 K (b).
| (a) | Parameter | Unit | P1 | P2 | P3 | P4 |
|
|
||||||
| R 0 | km | 7.11 | 41.5 | 83 | 118.6 | |
| R f | km | 6.02 | 35.11 | 70.2 | 100.3 | |
| t 0 | Ma | 0 | 1.62 | 1.79 | 1.98 | |
| t 1 | Ma | 0.30 | 2.65 | 3.20 | 4.08 | |
| t 2 | Ma | 0.69 | 4.90 | 6.15 | 8.27 | |
| Δt | Ma | 0.39 | 2.25 | 2.95 | 4.19 | |
| t 3 | Ma | – | 6.66 | 13.49 | 17.69 | |
| R m | 0.32 | 0.42 | 0.60 | 0.72 | ||
| core | y/n | n | y | y | y | |
| D c | – | 0.33 | 0.40 | 0.39 | ||
| V c | % | – | ≈3.6 | ≈6.4 | ≈5.94 | |
| D m | – | 0.33 | 0.40 | 0.37 | ||
| V m | % | – | ≈25.2 | ≈44.8 | ≈38 | |
| D r | 0.04 | 0.04 | 0.03 | ≤0.02 | ||
| V u | % | 100 | ≈71.2 | ≈48.8 | ≈56 | |
|
|
||||||
| (b) | Parameter | Unit | PL1 | PL2 | PL3 | PL4 |
|
|
||||||
| R 0 | km | 7.11 | 41.5 | 83 | 118.6 | |
| R f | km | 6.02 | 35.11 | 70.5 | 100.3 | |
| t 0 | Ma | 0 | 1.62 | 1.79 | 1.98 | |
| t 1 | Ma | 0.13 | 2.38 | 2.79 | 3.30 | |
| t 2 | Ma | 0.29 | 2.90 | 3.38 | 4.05 | |
| Δt | Ma | 0.16 | 0.52 | 0.59 | 0.75 | |
| t 3 | Ma | 0.27 | 5.53 | 10.98 | 14.62 | |
| R m | 0.54 | 0.60 | 0.72 | 0.72 | ||
| core | y/n | y | y | y | y | |
| D c | 0.35 | 0.39 | 0.42 | 0.40 | ||
| V c | % | ≈4.3 | ≈5.9 | ≈7.4 | ≈6.4 | |
| D m | 0.37 | 0.39 | 0.43 | 0.42 | ||
| V m | % | ≈33 | ≈41.5 | ≈54 | ≈48.7 | |
| D r | 0.04 | 0.04 | 0.03 | ≤0.02 | ||
| V u | % | ≈62.7 | ≈52.6 | ≈38.6 | ≈44.9 | |
Notes. R0 is the initial radius, Rf is the final radius after accretion, t0 is the accretion time, t1 is the start time of iron melt migration, t2 is the time of last iron melt migration into an iron core, Δt is the duration of core formation, t3 is the time of the last migration of silicate melt in a pure silicate matrix, Rm is the initial location of iron melt migration, Dc is the iron core thickness, Dm is the silicate mantle thickness and Dr is the regolith layer thickness relative to planetesimal radius. Vc is the core volume, Vm is the mantle volume and Vu is the unsegregated volume percentage relative to the planetesimal volume.
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