Physics
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984rspta.313...77r&link_type=abstract
(Royal Society, Discussion on Rotation in the Solar System, London, England, Mar. 8, 9, 1984) Royal Society (London), Philosophi
Physics
13
Lunar Magnetic Fields, Lunar Rotation, Paleomagnetism, Axes Of Rotation, Magnetic Dipoles
Scientific paper
The paleopoles of the moon have been calculated from the paleomagnetic directions of lunar crustal strata, determined by Coleman and Russell (1977), Hood (1980 and 1981), and Hood et al. (1978 and 1981) from Apollo 15 and 16 subsatellite data. Because of the dominant role of the Coriolis force in the core-dynamo hydromagnetics, the lunar dipole magnetic field would have been aligned along the axis of rotation. As the paleopoles lie in bipolar groupings along 3 different axes, far from the present axis (the magnetizations are dated at 4.2, 4.0, and 3.85 Gyr ago), it is concluded that the moon was reoriented at least three times. These polar displacements are attributed to the creation of multiring basins at these times by the collision of fragments of at least three lunar satellites, the orbits of which decayed by tidal friction. The actual paths of the pole are explained by Euler's theorem applied to a moon in which the interior can flow by solid-state creep.
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