E. J. Crapster-Pregont

TL;DR: In this article, the major-element composition of the surface of Mercury was mapped from orbital MESSENGER X-Ray Spectrometer measurements, and the results revealed highly variable compositions (e.g., Mg/Si and Al/Si range over 0.1 − 0.8 and 0.4, respectively).

TL;DR: In this paper, the relative abundances and chemical compositions of the macroscopic components or "inclusions" (chondrules and refractory inclusions) and fine-grained mineral matrix in chondritic meteorites provide constraints on astrophysical theories of inclusion formation and chondrite accretion.

TL;DR: The X-Ray Spectrometer (XRS) on the MESSENGER spacecraft provided measurements of major-element ratios across the surface of Mercury's surface, and the final maps were archived in NASA's Planetary Data System as discussed by the authors.

TL;DR: In this article, the authors investigate the likeliness of the existence of an iron sulfide layer (FeS matte) at the core-mantle boundary (CMB) of Mercury by comparing new chemical surface data obtained by the X-ray Spectrometer onboard the MESSENGER spacecraft with geochemical models supported by high-pressure experiments under reducing conditions.

TL;DR: Nittler et al. as discussed by the authors presented a detailed analysis of the X-ray observations from NASA's Mars Exploration Vehicle (MESSENGER) X-Ray OBSERVATION.