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Table 2

Initial volatile concentrations (ppm by mass) of CO2 and H2O in the mantle relative to a total mantle mass of 4.208 × 1024 kg.

Case Final outgassed Initial abundance


(bar) (ppm) (ppm)
1 0.1 25 63 234
2 0.13 32 79 227
3 0.25 74 160 197
4 0.33 110 221 181
5 0.5 220 380 155
6 0.66 441 666 136
7 0.75 662 941 128
8 0.83 1103 1483 121
9 0.9 1986 2558 116

Notes. Final volume mixing ratio and partial pressure of CO2 is and , respectively.All parameter combinations result in a 220 bar partial pressure atmosphere of H2O once solidification and hence outgassing is complete. A suffix of ‘v’ and ‘c’ to the case number denotes a variable and constant mixing length, respectively. An additional suffix of ‘s’ denotes that gravitational separation of the melt and solid phase is also included.

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