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- W2775465076 endingPage "51" @default.
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- W2775465076 abstract "The chemical composition of a planetary body reflects its starting conditions modified by numerous processes during its formation and geological evolution. Measurements by X-ray, gamma-ray, and neutron spectrometers on the MESSENGER spacecraft revealed Mercury's surface to have surprisingly high abundances of the moderately volatile elements sodium, sulfur, potassium, chlorine, and thorium, and a low abundance of iron. This composition rules out some formation models for which high temperatures are expected to have strongly depleted volatiles and indicates that Mercury formed under conditions much more reducing than the other rocky planets of our Solar System. Through geochemical modeling and petrologic experiments, the planet's mantle and core compositions can be estimated from the surface composition and geophysical constraints. The bulk silicate composition of Mercury is likely similar to that of enstatite or metal-rich chondrite meteorites, and the planet's unusually large core is most likely Si rich, implying that in bulk Mercury is enriched in Fe and Si (and possibly S) relative to the other inner planets. The compositional data for Mercury acquired by MESSENGER will be crucial for quantitatively testing future models of the formation of Mercury and the Solar System as a whole, as well as for constraining the geological evolution of the innermost planet." @default.
- W2775465076 created "2017-12-22" @default.
- W2775465076 creator A5018854323 @default.
- W2775465076 creator A5029745636 @default.
- W2775465076 creator A5039919191 @default.
- W2775465076 creator A5064596299 @default.
- W2775465076 date "2018-12-20" @default.
- W2775465076 modified "2023-10-14" @default.
- W2775465076 title "The Chemical Composition of Mercury" @default.
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