Table 4
Comparison between the calculated and the average measured isotopic composition (εMars) from Dauphas (2017) for Δ17O, ε50Ti, ε54Cr, and ε92 Mo, Kruijer et al. (2017) for μ142Nd and Brasser et al. (2018) for ε64Ni of Mars’ mantle.
| Δ17 O | ± | ε50 Ti | ± | ε54Cr | ± | |
|---|---|---|---|---|---|---|
| Calculated | 0.43 | 0.33 | –0.37 | 0.21 | –0.14 | 0.13 |
| Measured | 0.27 | 0.03 | –0.54 | 0.17 | –0.19 | 0.04 |
| μ142Nd | ± | ε64Ni | ± | ε92Mo | ± | |
| Calculated | –12.5 | 2.6 | –0.07 | 0.11 | 0.63 | 0.21 |
| Measured | –16 | 8 | 0.10 | 0.28 | 0.20 | 0.53 |
Notes. The isotopic anomaly of these elements is calculated from a break location of the disk at 1.3 AU in the Grand Tack model. Carbonaceous chondrite is also included in the calculation (see Sect. 6 for details). The uncertainties of the calculated values and the average measured values are 2σ.
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