Magma ocean formation due to giant impacts

Details Magma ocean formation due to giant impacts Magma ocean formation due to giant impacts

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pcmo.work...66t&link_type=abstract

In Lunar and Planetary Inst., Workshop on the Physics and Chemistry of Magma Oceans from 1 Bar to 4 Mbar p 66-67 (SEE N92-28587

Physics

Impact Melts, Magma, Mathematical Models, Meteorite Collisions, Oceans, Planetary Evolution, Terrestrial Planets, Earth Planetary Structure, Effects, Hypervelocity Impact, Mass, Projectiles

Scientific paper

The effect of giant impacts on the initial chemical and thermal states of the terrestrial planets is just now being explored. A large high speed impact creates an approximately hemispherical melt region with a radius that depends on the projectile's radius and impact speed. It is shown that giant impacts on large planets can create large, intact melt regions containing melt volumes up to a few times the volume of the projectile. These large melt regions are not created on asteroid sized bodies. If extruded to the surface, these regions contain enough melt to create a magma ocean of considerable depth, depending on the impact speed, projectile radius, and gravity of the target planet.

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