Superheating Effects on Metal-Silicate Partitioning of Siderophile Elements

Publication Status is "Submitted" Or "In Press: 
LDEO Publication: 
Publication Type: 
Year of Publication: 
1993
Editor: 
Journal Title: 
Science
Journal Date: 
Dec 17
Place Published: 
Tertiary Title: 
Volume: 
262
Issue: 
5141
Pages: 
1858-1861
Section / Start page: 
Publisher: 
ISBN Number: 
0036-8075
ISSN Number: 
Edition: 
Short Title: 
Accession Number: 
ISI:A1993MM51100031
LDEO Publication Number: 
Call Number: 
Abstract: 

Liquid metal-liquid silicate partition coefficients for several elements at 100 kilobars and temperatures up to about 3000 kelvin in carbon capsules experimentally converge on unity with increasing temperature. The sense of change of the partition coefficients with temperature resembles the extrapolation of Murthy and may partially contribute to, but by no means provide a complete resolution of, the ''excess'' siderophile problem in the Earth's mantle. Sulfur and perhaps carbon successfully compete with oxygen for sites in the metallic liquid at these temperatures and pressures. This observation casts doubt upon the hypothesis that oxygen is the light element in the Earth's core.

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Mm511Times Cited:58Cited References Count:18

DOI: