Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published April 10, 1975 | Published
Journal Article Open

On the Composition of the Lunar Interior


There is now abundant geophysical and geochemical evidence suggesting that the moon has a thick plagioclase rich outer shell. This is most easily explained by early and extensive melting of a CaO and Al_2O_3 rich moon followed by fractional crystallization involving plagioclase flotation. Melilite is probably an important constituent of the interior. This model explains the seismic velocities, the mean density, and the moment of inertia of the moon. The moon is 73–88% high-temperature condensate.

Additional Information

© 1975 American Geophysical Union. Received December 10, 1973; revised July 29, 1974; accepted December 2, 1974. This note is a combination and condensation of replies written in response to extensive comments by A. E. Ringwood on 'Removal of a constraint on the composition of the lunar interior.' I would like to thank Ringwood for this opportunity to elaborate further on the present constraints regarding the interior of the moon. Although he withdrew his objections, he does not necessarily subscribe to all the views in this paper. This work was supported by NASA grant NGL 05-002-069. Contribution 2520 of the Division of Geological Sciences, California Institute of Technology, Pasadena, California 91109.

Attached Files

Published - jgr13369.pdf


Files (217.6 kB)
Name Size Download all
217.6 kB Preview Download

Additional details

August 19, 2023
October 20, 2023