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Table 2
Mean compositions of Earth analogs and Mars analogs at 200 Myr, normalized to Mg (by atomic).
| Mantle compositions (oxides) | |||
|---|---|---|---|
| Oxide | Earth analogs | Mars analogs | Reference |
| 0.0440 ± 0.0006 | 0.0422 ± 0.0012 | Earth: 0.0464/Mars: 0.0458 | |
| CaO | 0.0641 ± 0.0010 | 0.0616 ± 0.0016 | Earth: 0.0673/Mars: 0.0668 |
| FeO | 0.1417 ± 0.0082 | 0.2018 ± 0.0452 | Earth: 0.1196/Mars: 0.2660 |
| NiO | 0.0036 ± 0.0003 | 0.0031 ± 0.0011 | Earth: 0.0036/Mars: 0.0008 |
| SiO2 | 0.8640 ± 0.0227 | 0.9467 ± 0.0300 | Earth: 0.7968/Mars: 0.9846 |
| Core compositions (elements) | |||
| Element | Earth analogs | Mars analogs | Reference |
| Fe | 0.7562 ± 0.0174 | 0.6513 ± 0.0674 | Earth: 0.7931/Mars: 0.4319 |
| Ni | 0.0408 ± 0.0004 | 0.0400 ± 0.0013 | Earth: 0.0450/Mars: 0.0383 |
| Si | 0.0654 ± 0.0083 | 0.0133 ± 0.0063 | Earth: 0.0738/Mars: – |
| O | 0.0302 ± 0.0062 | 0.0053 ± 0.0013 | Earth: 0.0648/Mars: 0.0986 |
Notes. Mantle compositions are reported as oxides, whereas core compositions are reported as elemental abundances. Uncertainties denote ±1σ across the selected systems (n = 7).
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