Other
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..617j&link_type=abstract
Lunar and Planetary Science, volume 27, page 617
Other
Experimental Partitioning, Graphite, Noble Gases, Xenon
Scientific paper
Previous studies have suggested that, compared to the other noble gases, Xe may be quite compatible in solid silicate phases during partial melting in the Earth's upper mantle. Conceivably, if Xe is compatible in some major silicate phase, such as olivine, the observed Xe depletion of the Earth's atmosphere could be simply explained by retention of Xe in the mantle. Consequently, we have attempted to partition Xe between olivine, pyroxene, spinel, graphite, and silicate liquid at igneous temperatures and pressures. We find that Xe is highly incompatible in olivine, pyroxene, and spinel, but that it is slightly compatible in graphite. We suggest that the carbon-rich phases observed in mantle xenoliths are the most likely hosts for Xe in the mantle. Alternatively, graphite in crustal rocks such as shales or other pelites could also serve as a host for Xe. Whether graphite in crustal materials could also explain the depletion of Xe in the martian atmosphere is problematical.
Houston Jones Jane
Walker Danielle
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