  The planetary differentiation models of Mars are proposed that take into
account core-mantle and core-mantle-crust differentiation. The numerical
simulations are presented for the early thermal evolution of Mars spanning up
to the initial 25 million years (Ma) of the early solar system, probably for
the first time, by taking into account the radiogenic heating due to the
short-lived nuclides, 26Al and 60Fe. The influence of impact heating during the
accretion of Mars is also incorporated in the simulations. The early accretion
of Mars would necessitate a substantial role played by the short-lived nuclides
in its heating. 26Al along with impact heating could have provided sufficient
thermal energy to the entire body to substantially melt and trigger planetary
scale differentiation. This is contrary to the thermal models based exclusively
on the impact heating that could not produce widespread melting and planetary
differentiation. The early onset of the accretion of Mars perhaps within the
initial ~1.5 Ma in the early solar system could have resulted in substantial
differentiation of Mars provide it accreted over the timescale of ~1 Ma. This
seems to be consistent with the chronological records of the Martian
meteorites.
