A lunar density model consistent with topographic, gravitational, librational, and seismic data

Details A lunar density model consistent with topographic, gravitational, librational, and seismic data A lunar density model consistent with topographic, gravitational, librational, and seismic data

Mar 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.1306b&link_type=abstract

Journal of Geophysical Research, vol. 82, Mar. 10, 1977, p. 1306-1314.

Astronomy and Astrophysics

Astronomy

34

Astronomical Models, Density Distribution, Lunar Composition, Moon, Planetary Structure, Selenology, Harmonic Analysis, Librational Motion, Lunar Crust, Lunar Gravitation, Lunar Seismographs, Lunar Topography, Mascons, Moments Of Inertia, Radial Distribution

Scientific paper

A series of models of the lunar interior are derived from topographic, gravitational, librational, and seismic data. The librational parameters and low-degree gravity harmonics result primarily from surface height variations and only secondarily from lateral density variations. The moon departs from isostasy, even for the low-degree harmonics, with a maximum superisostatic stress of 200 bars under the major mascon basins. The mean crustal thicknesses under different physiographic regions are: mascons, 30-35 km; irregular maria, 50-60 km; and highlands, 90-110 km. A possible composition consistent with our model is an anorthositic crust, underlain by a predominantly forsterite upper mantle which grades into a refractory rich lower mantle surrounding a pyrrhotite core.

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