Investigations of local Bouguer gravity anomalies of the Apennines and Taurus Mountains of the moon

Details Investigations of local Bouguer gravity anomalies of the Apennines and Taurus Mountains of the moon Investigations of local Bouguer gravity anomalies of the Apennines and Taurus Mountains of the moon

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pepi...27...47j&link_type=abstract

Physics of the Earth and Planetary Interiors, vol. 27, Oct. 1981, p. 47-59. Research sponsored by the Deutsche Forschungsgemein

Physics

1

Bouguer Law, Gravimetry, Gravity Anomalies, Lunar Gravitation, Selenology, Basalt, Lunar Topography, Orography, Viscoelasticity, Moon, Features, Apennines Montes, Taurus Montes, Anomalies, Lithosphere, Gravitational Properties, Doppler Effects, Topography, Isostasy, Crust, Compensation, Viscosity, Models, Ages, Maria, Basalts, Thickness, Lacus Bonitatis, Sinus Amores, Data, Theoretical Studies, Parameters

Scientific paper

The local Bouguer gravity anomalies of the lunar Apennine and Taurus Mountains are investigated in a study of the temporal properties of isostatic compensation processes. The anomalies are calculated from low-altitude line-of-sight free-air Doppler gravity profiles obtained from Apollo 15 measurements for the Apennines and Apollo 15 and 17 for the Taurus Mountains. The Bouguer anomalies exhibit no significant relative negative values across the Apennine range, indicating lack of isostatic compensation, while significant local Bouguer minima of about -15 mgal indicate at least partial compensation for the older Taurus mountains. No local Bouguer anomalies are associated with the mare basalt patches of the Sinus Amoris and Lacus Bonitatus areas of the Taurus region, allowing upper limits of 0.3-1.5 km and 1.3 km to be estimated for the basalt thicknesses in the respective regions. The temporal evolution of the lunar crust viscosity in the areas of the Apennines and the Taurus Mountains is then estimated under the assumption of a viscoelastic compensation mechanism, and viscosity ranges of 10 to the 24th to 5 x 10 to the 25th P for 4.4 billion years ago, 10 to the 26th to 10 to the 27th P 3.9 billion years ago, and 5 x 10 to the 26th to 10 the 28th P 3.0 billion years ago are obtained.

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