A komatiite component in Apollo 16 highland breccias Implications for the nickel-cobalt systematics and bulk composition of the moon

Details A komatiite component in Apollo 16 highland breccias Implications for the nickel-cobalt systematics and bulk composition of the moon A komatiite component in Apollo 16 highland breccias Implications for the nickel-cobalt systematics and bulk composition of the moon

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987e%26psl..81..105r&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 81, no. 2-3, Jan. 1987, p. 105-117.

Computer Science

27

Apollo 16 Flight, Breccia, Cobalt, Lunar Composition, Lunar Crust, Nickel, Basalt, Earth Mantle, Meteorites, Mixing, Olivine

Scientific paper

The composition of a 'primitive component' in the lunar crust at the Apollo 16 landing site is retrieved via an analysis of mixing relationships displayed by lunar breccias from the Apollo 15, 16, and 17 sites. This component is found to be a komatiite which is compositionally similar to terrestrial komatiites both in major and minor elements. The lunar komatiite is believed to have formed by melting of the lunar interior at depths greater than were involved in the formation of the lunar magma ocean which was parental to the crust. The compositional similarity between lunar and terrestrial komatiites strongly implies a corresponding similarity between the compositions of their source regions in the lunar interior and the earth's upper mantle. The fact that most Ni and Co in highland samples occur today in metallic form is believed to be due to in situ reduction of the oxidized species during impact metamorphism and impact melting occurring soon after differentiation of the lunar crust.

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