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Cosmochemistry of the rare earth elements: meteorite studies.
- W. Boynton
Detection of Perchlorate and the Soluble Chemistry of Martian Soil at the Phoenix Lander Site
Results suggest that the soil at the Phoenix landing site must have suffered alteration through the action of liquid water in geologically the recent past, and revealed an alkaline environment in contrast to that found by the Mars Exploration Rovers, indicating that many different environments have existed on Mars.
An exceptionally bright flare from SGR 1806–20 and the origins of short-duration γ-ray bursts
Soft-γ-ray repeaters (SGRs) are galactic X-ray stars that emit numerous short-duration (about 0.1 s) bursts of hard X-rays during sporadic active periods. They are thought to be magnetars: strongly…
Chicxulub Crater: A possible Cretaceous/Tertiary boundary impact crater on the Yucatán Peninsula, Mexico
We suggest that a buried 180-km-diameter circular structure on the Yucatan Peninsula, Mexico, is an impact crater. Its size and shape are revealed by magnetic and gravity-field anomalies, as well as…
Distribution of Hydrogen in the Near Surface of Mars: Evidence for Subsurface Ice Deposits
The Gamma-Ray Spectrometer on the Mars Odyssey has identified two regions near the poles that are enriched in hydrogen, and it is suggested that the host of the hydrogen in the subsurface layer is ice, which constitutes 35 ± 15% of the layer by weight.
The Major-Element Composition of Mercury’s Surface from MESSENGER X-ray Spectrometry
Geochemical data show that the major rock-forming components of Mercury are characterized by high sulfur content, and this observation supports the view that Mercury formed from highly reduced precursor materials, perhaps akin to enstatite chondrite meteorites or anhydrous cometary dust particles.
Global distribution of near-surface hydrogen on Mars
 Neutron data observed using the Neutron Spectrometer aboard 2001 Mars Odyssey provide a lower limit to the global inventory of Martian water-equivalent hydrogen. Hydrogen-rich deposits ranging…
Fractionation in the solar nebula - Condensation of yttrium and the rare earth elements
- W. Boynton
- Physics, Geology
- 1 May 1975
H2O at the Phoenix Landing Site
The analysis of the data from the Phoenix mission revealed an alkaline environment, in contrast to that found by the Mars Exploration Rovers, indicating that many different environments have existed on Mars.