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Article Dans Une Revue Journal of Geophysical Research. Planets Année : 2012

Density and porosity of the lunar crust from gravity and topography

Résumé

Newly obtained gravity and topography data of the Moon, combined with a lithospheric flexure model that considers both surface and subsurface loading, are used to place constraints on the density of the upper crust from a localized spectral admittance analysis. Subsurface loads are found to be relatively unimportant in the highlands, and when subsurface loads are neglected, the best fitting bulk densities for a number of highland regions are found to vary from 2590 to 2870 kg m À3 , with a mean value of 2691 kg m À3. Crustal rock densities estimated from geochemical considerations and global iron and titanium abundances imply somewhat greater densities, which we interpret as porosity affecting the gravity-derived bulk density estimates. The average porosity in the upper few kilometers of crust is calculated to be about 7.7%, which is consistent with porosity estimates of impact-fractured meteorites and terrestrial impact craters. Citation: Huang, Q., and M. A. Wieczorek (2012), Density and porosity of the lunar crust from gravity and topography,

Domaines

Planétologie
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Dates et versions

hal-02458586 , version 1 (26-06-2020)

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Qian Huang, Mark Wieczorek. Density and porosity of the lunar crust from gravity and topography. Journal of Geophysical Research. Planets, 2012, 117 (E5), pp.E05003. ⟨10.1029/2012JE004062⟩. ⟨hal-02458586⟩
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