Physical Properties of the Outer Core

Research output: Chapter in Book/Report/Conference proceedingChapter

4 Citations (Scopus)

Abstract

The physical properties of liquid Fe alloys are important for understanding the characteristics of the molten outer core. The possible core composition can be constrained by matching the observed seismic data with the measured sound velocity and density of liquid Fe alloys. The transport properties of liquid Fe alloys strongly influence the convection behavior of the outer core. This chapter reviews the latest results on the elastic and transport properties of liquid Fe alloys obtained based on experimental and numerical approaches. Three variables of pressure (P), temperature (T), and specific volume (V), which are indispensable for understanding the structure and properties of Earth's interior, are linked by an equation of state (EOS). Convectional motion of the outer core is controlled by core magneto hydrodynamics. The viscosity of liquid Fe, Fe-S, and Fe-C at high pressures has been measured using the falling sphere method combined with in situ X-ray radiography.

Original languageEnglish
Title of host publicationDeep Earth
Subtitle of host publicationPhysics and Chemistry of the Lower Mantle and Core
Publisherwiley
Pages129-142
Number of pages14
ISBN (Electronic)9781118992487
ISBN (Print)9781118992470
DOIs
Publication statusPublished - Jan 1 2015
Externally publishedYes

Keywords

  • Convectional motion
  • Elastic properties
  • Equation of state
  • In situ X-ray radiography
  • Liquid Fe alloys
  • Magnetohydrodynamics
  • Molten outer core
  • Transport properties

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

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