Physicochemical Model of the Formation of the Earth’s Core

  • O. L. Kuskov
  • N. I. Khitarov


Studies of the physical properties of the Earth’s core by Birch [1] have indicated that it is about 10 to 20% less dense than nickel iron and that its seismic velocity is substantially greater than that of nickel iron under comparable P-T conditions. These conclusions have been confirmed by investigations on the densities and seismic velocities of metals at extreme pressure, using shock wave techniques [2,3]. It, therefore, appears that the Earth’s core contains a substantial amount of an element with a low density and which can increase the seismic velocity of iron. Elements which might be considered as candidates are Si, S, C, and O. In this paper, the possibility of silicon entering the composition of the Earth’s core will be considered.


Seismic Velocity Liquid Iron Outer Core Ferromagnesian Silicate Isobaric Section 
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Copyright information

© Springer Science+Business Media New York 1979

Authors and Affiliations

  • O. L. Kuskov
    • 1
  • N. I. Khitarov
    • 1
  1. 1.Vernadsky Institute of Geochemistry and Analytical ChemistryMoscowUSSR

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