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Browsing Dept. of Mineral Sciences Staff Publications by Author "Weider, Shoshana Z."

Browsing Dept. of Mineral Sciences Staff Publications by Author "Weider, Shoshana Z."

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  • Chemical heterogeneity on Mercury's surface revealed by the MESSENGER X-Ray Spectrometer 
    Weider, Shoshana Z.; Nittler, Larry R.; Starr, Richard D.; McCoy, Timothy J.; Stockstill-Cahill, Karen R.; Byrne, Paul K.; Denevi, Brett W.; Head, James W.; Solomon, Sean C. (2012)
    We present the analysis of 205 spatially resolved measurements of the surface composition of Mercury from MESSENGER's X-Ray Spectrometer. The surface footprints of these measurements are categorized according to ...
  • Magnesium-rich crustal compositions on Mercury: Implications for magmatism from petrologic modeling 
    Stockstill-Cahill, Karen R.; McCoy, Timothy J.; Nittler, Larry R.; Weider, Shoshana Z.; Hauck, Steven A. (2012)
    We have conducted petrologic modeling of MESSENGER-derived compositions and analog compositions to gain a better understanding of the petrogenesis of the crust of Mercury. Analog compositions included a 1425°C partial melt ...
  • Major-element abundances on the surface of Mercury: Results from the MESSENGER Gamma-Ray Spectrometer 
    Evans, Larry G.; Peplowski, Patrick N.; Rhodes, Edgar A.; Lawrence, David J.; McCoy, Timothy J.; Nittler, Larry R.; Solomon, Sean C.; Sprague, Ann L.; Stockstill-Cahill, Karen R.; Starr, Richard D.; Weider, Shoshana Z.; Boynton, William V.; Hamara, David K.; Goldsten, John O. (2012)
    Orbital gamma-ray measurements obtained by the MESSENGER spacecraft have been analyzed to determine the abundances of the major elements Al, Ca, S, Fe, and Na on the surface of Mercury. The Si abundance was determined and ...
  • The Major-Element Composition of Mercury s Surface from MESSENGER X-ray Spectrometry 
    Nittler, Larry R.; Starr, Richard D.; Weider, Shoshana Z.; McCoy, Timothy J.; Boynton, William V.; Ebel, Denton S.; Ernst, Carolyn M.; Evans, Larry G.; Goldsten, John O.; Hamara, David K.; Lawrence, David J.; McNutt, Ralph L.; Schlemm, Charles E.; Solomon, Sean C.; Sprague, Ann L. (2011)
    X-ray fluorescence spectra obtained by the MESSENGER spacecraft orbiting Mercury indicate that the planet s surface differs in composition from those of other terrestrial planets. Relatively high Mg/Si and low Al/Si and ...
  • Variations in the abundances of potassium and thorium on the surface of Mercury: Results from the MESSENGER Gamma-Ray Spectrometer 
    Peplowski, Patrick N.; Lawrence, David J.; Rhodes, Edgar A.; Sprague, Ann L.; McCoy, Timothy J.; Denevi, Brett W.; Evans, Larry G.; Head, James W.; Nittler, Larry R.; Solomon, Sean C.; Stockstill-Cahill, Karen R.; Weider, Shoshana Z. (2012)
    A technique for converting gamma-ray count rates measured by the Gamma-Ray Spectrometer on the MESSENGER spacecraft to spatially resolved maps of the gamma-ray emission from the surface of Mercury is utilized to map the ...

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