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| Content Provider | Springer Nature Link |
|---|---|
| Author | Boynton, William V. Sprague, Ann L. Solomon, Sean C. Starr, Richard D. Evans, Larry G. Feldman, William C. Trombka, Jacob I. Rhodes, Edgar A. |
| Copyright Year | 2007 |
| Abstract | The instrument suite on the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft is well suited to address several of Mercury’s outstanding geochemical problems. A combination of data from the Gamma-Ray and Neutron Spectrometer (GRNS) and X-Ray Spectrometer (XRS) instruments will yield the surface abundances of both volatile (K) and refractory (Al, Ca, and Th) elements, which will test the three competing hypotheses for the origin of Mercury’s high bulk metal fraction: aerodynamic drag in the early solar nebula, preferential vaporization of silicates, or giant impact. These same elements, with the addition of Mg, Si, and Fe, will put significant constraints on geochemical processes that have formed the crust and produced any later volcanism. The Neutron Spectrometer sensor on the GRNS instrument will yield estimates of the amount of H in surface materials and may ascertain if the permanently shadowed polar craters have a significant excess of H due to water ice. A comparison of the FeO content of olivine and pyroxene determined by the Mercury Atmospheric and Surface Composition Spectrometer (MASCS) instrument with the total Fe determined through both GRNS and XRS will permit an estimate of the amount of Fe present in other forms, including metal and sulfides. |
| Starting Page | 85 |
| Ending Page | 104 |
| Page Count | 20 |
| File Format | |
| ISSN | 00386308 |
| Journal | Space Science Reviews |
| Volume Number | 131 |
| Issue Number | 1-4 |
| e-ISSN | 15729672 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2007-10-13 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Mercury MESSENGER Mercury’s surface chemistry Gamma-ray spectrometry X-ray spectrometry Space missions Planetary surfaces Planetology Astrophysics Extraterrestrial Physics, Space Sciences Astronomy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Astronomy and Astrophysics Space and Planetary Science |
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