Internal structure of Mars

Details Internal structure of Mars Internal structure of Mars

Dec 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973pepi....7..477b&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 7, Issue 4, p. 477-485.

Physics

6

Scientific paper

Mars models have been constructed considering the effects of temperature profile, chemical composition, and crustal structure on the Martian internal structure and core size. Interpretations of the coefficient of the second zonal harmonic in the aeropotential field (J2) are presented for three crustal types. The moment of inertia and hence the core size depend strongly on the adopted crustal model. It is shown that calculations based on complete hydrostatic equilibrium give only a lower limit to the core size; this limit being 3-5% of the planet's mass sReasonable estimates of the crustal structure indicate that the Martian mantle has a composition similar to that of the earth, i.e., olivine with a forsterite content of 65-80%, a core radius of approximately 1250 km and a mass of 9-10% of the planet's mass. However, with the current uncertainties in the crustal structure and core density, it is conceivable that the core could contain as much as 20-25% of the planetary mass.

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