Internal structure and properties of Mars

Details Internal structure and properties of Mars Internal structure and properties of Mars

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977icar...32...73j&link_type=abstract

Icarus, vol. 32, Sept. 1977, p. 73-84.

Astronomy and Astrophysics

Astronomy

11

Astronomical Models, Mars (Planet), Planetary Composition, Planetary Cores, Planetary Mantles, Planetary Structure, Density Distribution, Iron Compounds, Mars Surface, Planetary Evolution, Seismic Waves, Temperature Profiles

Scientific paper

Theoretical physical models of the Martian interior are presented in the light of recent and revised data and constraints. These models include thermal evolution, densities, and seismic-wave velocities. The interior of Mars appears to be earthlike in many respects. Although thermal models indicate that Mars has passed its peak of evolution, it may still have an asthenosphere and may be moderately active tectonically. Mars has an Fe-FeS core with a radius of 1500-2000 km. The mantle is enriched in FeO with an olivine composition of about Fo75. Theoretically determined seismic-wave velocities are relatively well constrained in the mantle, with upper-mantle P-wave velocities ranging from 7.64 to 7.80 km/sec. However, there are wide variations in P-wave velocity in the core, dependent on composition. The shadow zone due to the core is larger than earth's.

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