Mercury's Surface Composition: Early Results from the MESSENGER X-Ray Spectrometer

Details Mercury's Surface Composition: Early Results from the MESSENGER X-Ray Spectrometer Mercury's Surface Composition: Early Results from the MESSENGER X-Ray Spectrometer

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..863s&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.863

Physics

Scientific paper

X-Ray Spectrometer (XRS) data acquired during both solar flare and quiescent solar conditions indicate that Mercury's surface is significantly richer in Mg and poorer in Al and Ca than both lunar crustal rocks and terrestrial basalts. The derived Mg/Si, Al/Si, and Ca/Si ratios lie within the range of terrestrial ultramafic rocks. Analysis of flare spectra also indicate low total concentrations of Ti (<1 wt. %) and Fe (<~5 wt. %) and a surprisingly high S abundance (~3 wt. %) in surface materials on Mercury.

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