Physics
Scientific paper
Jun 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.2863f&link_type=abstract
Journal of Geophysical Research, vol. 83, June 10, 1978, p. 2863-2871.
Physics
3
Gravity Anomalies, Lunar Gravitation, Lunar Topography, Bouguer Law, Lunar Maps, Apenninus, Montes, Topography, Isostasy, Mantle, Crust, Moon, Imbrium, Mare, Serenitatis, Gravity Profiles, Gravity Anomalies, Shear Strain, Energy
Scientific paper
High-resolution gravity and topography data taken over the Apennine Mountains have been used to compute their isostatic state. Results show that the Apennines are uncompensated; thus this state implies that the lunar crust and upper mantle have been strong enough over 3.9 b.y. to support the load exerted by this topographic excess. The Apennines produce a maximum shear stress of 60 bars at a depth of 60 km. A lower bound on the lunar crustal viscosity of 10 to the 27th power P is calculated on the basis of the assumption of a 10% relaxation over 3.9 b.y. Studies of a broad negative regional anomaly located between Maria Serenitatis and Imbrium necessitate a locally thicker crust to satisfy the observed data. This anomaly may have been produced by a lateral transport of crustal material from beneath the giant impact basins as a result of rebound at the crust-mantle interface.
Ferrari Agnaldo José
Nelson David L.
Phillips James R.
Sjogren William L.
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