Influence of Thermal Stratification on the Structure and Evolution of the Martian Core

The apparent end of the internally generated Martian magnetic field at 3.6–4.1 Ga is a key event in history and has been linked to insufficient core cooling. We investigate thermal evolution mantle using parameterized models considered three improvements on previous studies. First, our account for stratification core. Second, are constrained by estimates present-day areotherm. Third, we consider conductivity, , values range 5–40 W as suggested recent experiments iron alloys Mars conditions. majority indicate that fully conductive present with temperatures greater than 1940 K. All consistent . Models an activation volume 6 (0) require reference viscosity Pa s.