Basaltic magmatism and the bulk composition of the moon. I - Major and heat-producing elements

Details Basaltic magmatism and the bulk composition of the moon. I - Major and heat-producing elements Basaltic magmatism and the bulk composition of the moon. I - Major and heat-producing elements

Jul 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977moon...16..389r&link_type=abstract

The Moon, vol. 16, July 1977, p. 389-423.

Physics

Geophysics

13

Basalt, Lunar Composition, Lunar Evolution, Magma, Petrology, Abundance, Geophysics, Heat Flux, Liquidus, Lunar Core, Lunar Crust, Lunar Maria, Lunar Rocks, Melting, Oxygen Isotopes, Rare Earth Elements

Scientific paper

A model for the interior structure and composition of the moon is developed exclusively from petrological-geochemical evidence, and its consistency with lunar geophysical data is evaluated. The petrogenesis of mare basalts is investigated, compositional data and phase relations for low-Ti basalts are used in an attempt to constrain the composition of the primordial lunar interior, and the source region of low-Ti basalts is considered. The petrogenesis of the lunar crust is discussed, and lunar heat flow controlled by radioactive elements are examined along with the oxygen isotope compositions of both lunar and terrestrial basalts. The results indicate that the major-element composition of the bulk moon is similar but not identical to that of earth's mantle and that this similarity extends to the abundances of rare earths, uranium, thorium, and probably many other involatile lithophile elements. It is shown that the model developed for the lunar internal structure provides an excellent explanation of the depth distributions of density and seismic velocities within the moon.

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