Electrical conductivity anomaly beneath Mare Serenitatis detected by Lunokhod 2 and Apollo 16 magnetometers

Details Electrical conductivity anomaly beneath Mare Serenitatis detected by Lunokhod 2 and Apollo 16 magnetometers Electrical conductivity anomaly beneath Mare Serenitatis detected by Lunokhod 2 and Apollo 16 magnetometers

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979m%26p....21..185v&link_type=abstract

Moon and the Planets, vol. 21, Oct. 1979, p. 185-192.

Mathematics

2

Electrical Resistivity, Lunar Magnetic Fields, Lunar Maria, Magnetic Anomalies, Magnetometers, Anisotropy, Apollo 16 Flight, Lunar Surface, Lunar Temperature, Lunokhod Lunar Roving Vehicles, Magma, Magnetic Variations, Mathematical Models

Scientific paper

Magnetic fluctuations measured by the Lunokhod 2 magnetometer in the Bay Le Monnier are distinctly anisotropic when compared to simultaneous Apollo 16 magnetometer data measured 1100 km away in the Descartes highlands. This anisotropy can be explained by an anomalous electrical conductivity of the upper mantle beneath Mare Serenitatis. A model is presented of anomalously lower electrical conductivity beneath Serenitatis and the simultaneous magnetic data from the Lunokhod 2 site at the mare edge and the Apollo 16 site are compared to the numerically calculated model solutions. This comparison indicates that the anisotropic fluctuations can be modeled by a nonconducting layer in the lunar lithosphere which is 150 km thick beneath the highlands and 300 km thick beneath Mare Serenitatis. A decreased electrical conductivity in the upper mantle beneath the mare may be due to a lower temperature resulting from heat carried out the magma source regions to the surface during mare flooding.

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