Equations of state of iron sulfide and constraints on the sulfur content of the earth

Details Equations of state of iron sulfide and constraints on the sulfur content of the earth Equations of state of iron sulfide and constraints on the sulfur content of the earth

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84..985a&link_type=abstract

Journal of Geophysical Research, vol. 84, Mar. 10, 1979, p. 985-998.

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23

Earth Core, Hugoniot Equation Of State, Pyrites, Pyrrhotite, Sulfur, Geology, Planetary Composition, Shock Waves

Scientific paper

New shock and release wave data for pyrrhotite (Fe/0.9/S) obtained over the pressure range of 3-158 GPa suggest that this mineral undergoes a major shock-induced phase change with an onset in the range 2.7-3.8 GPa. When the shock data are reduced to isotherms a nearly constant sulfur content from 10 to 6.5% in the range 9-12% is inferred. Using these bounds on the sulfur content of the core and depending on whether an olivine or pyroxene mantle stoichiometry is assumed the earth can be modeled as being depleted in S by a factor ranging from 1.7 to 3.2 with respect to the abundances of Si and from 2.8 to 7.5 relative to the abundance of Fe in CC1 carbonaceous chondrites.

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