Indigenous abundances of siderophile elements in the lunar highlands Implications for the origin of the moon

Computer Science

Scientific paper

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Abundance, Lunar Composition, Lunar Evolution, Lunar Surface, Apollo 16 Flight, Bibliographies, Chondrites, Lunar Rocks, Lunar Soil, Metals, Meteoritic Composition, Silicates

Scientific paper

The Apollo 16 highlands are regarded as a mixture of three components (cumulus plagioclase, intercumulus magma, and meteoric material from ordinary chondrites) in a study of the abundances of 13 siderophile elements. Attention is given to the similarity of the highland elements to those found in primitive low-Ti mare basalts. Such a similarity reinforces the hypothesis that the abundances in the parental highlands magma are indigenous. The origin of the abundances is thought to be the result of processes operating prior to the moon's accretion. Comparisons are drawn between the abundances of siderophile elements on the moon and those found in the upper mantle of the earth; and it is suggested that the moon may have been derived from the earth's mantle subsequent to core formation.

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