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Browsing Department of Mineral Sciences by Author "Nittler, Larry R."
Now showing items 1-14 of 14
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Rhodes, Edgar A.; Evans, Larry G.; Nittler, Larry R.; Starr, Richard D.; Sprague, Ann L.; Lawrence, David J.; McCoy, Timothy J.; Stockstill-Cahill, Karen R.; Goldsten, John O.; Peplowski, Patrick N.; Hamara, David K.; Boynton, William V.; Solomon, Sean C. (2011)[alpha]bstract<br/>During its three flybys of Mercury, the MESSENGER spacecraft made the first detection of gamma-ray emission from the planet's surface. With a closest approach distance of ~200 km, the flybys provided ...
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Nittler, Larry R.; McCoy, Timothy J.; Clark, Pamela E.; Murphy, Mary E.; Trombka, Jacob I.; Jarosewich, Eugene (2004)
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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 ...
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Evans, Larry G.; Starr, Richard D.; Bruckner, Johannes; Reedy, Robert C.; Boynton, William V.; Trombka, Jacob I.; Goldsten, John O.; Masarik, Jozef; Nittler, Larry R.; McCoy, Timothy J. (2001)
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Blewett, David T.; Chabot, Nancy L.; Denevi, Brett W.; Ernst, Carolyn M.; Head, James W.; Izenberg, Noam R.; Murchie, Scott L.; Solomon, Sean C.; Nittler, Larry R.; McCoy, Timothy J.; Xiao, Zhiyong; Baker, David M. H.; Fassett, Caleb I.; Braden, Sarah E.; Oberst, Juergen; Scholten, Frank; Preusker, Frank; Hurwitz, Debra M. (2011)High-resolution images of Mercury's surface from orbit reveal that many bright deposits within impact craters exhibit fresh-appearing, irregular, shallow, rimless depressions. The depressions, or hollows, range from ...
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Lawrence, David J.; Feldman, William C.; Goldsten, John O.; McCoy, Timothy J.; Blewett, David T.; Boynton, William V.; Evans, Larry G.; Nittler, Larry R.; Rhodes, Edgar A.; Solomon, Sean C. (2010)MESSENGER} Neutron Spectrometer {(NS)} observations of cosmic-ray-generated thermal neutrons provide the first direct measurements of Mercury's surface elemental composition. Specifically, we show that Mercury's ...
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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 ...
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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 ...
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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 ...
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McCoy, Timothy J.; Robinson, Mark S.; Nittler, Larry R.; Burbine, Thomas H. (2002)
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Peplowski, Patrick N.; Evans, Larry G.; Hauck, Steven A.; McCoy, Timothy J.; Boynton, William V.; Gillis-Davis, Jeffery J.; Ebel, Denton S.; Goldsten, John O.; Hamara, David K.; Lawrence, David J.; McNutt, Ralph L.; Nittler, Larry R.; Solomon, Sean C.; Rhodes, Edgar A.; Sprague, Ann L.; Starr, Richard D.; Stockstill-Cahill, Karen R. (2011)The MESSENGER Gamma-Ray Spectrometer measured the average surface abundances of the radioactive elements potassium (K, 1150 ± 220 parts per million), thorium (Th, 220 ± 60 parts per billion), and uranium (U, 90 ± 20 parts ...
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Burbine, Thomas H.; McCoy, Timothy J.; Nittler, Larry R.; Benedix, Gretchen K.; Cloutis, Edward A.; Dickinson, Tamara L. (2002)We investigate the possibility that Mercury's crust is very reduced with FeO concentrations of less than 02DC0.1 wt%. We believe that such a surface could have a composition of enstatite, plagioclase, diopside, and ...
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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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Nittler, Larry R.; Starr, Richard D.; Lim, Lucy; McCoy, Timothy J.; Burbine, Thomas H.; Reedy, Robert C.; Trombka, Jacob I.; Gorenstein, Paul; Squyres, Steven W.; Boynton, William V.; McClanahan, Timothy P.; Bhangoo, Jesse S.; Clark, Pamela E.; Murphy, Mary Ellen; Killen, Rosemary (2001)
Now showing items 1-14 of 14
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