Physics
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pepi...34..102c&link_type=abstract
Physics of the Earth and Planetary Interiors (ISSN 0031-9201), vol. 34, April 1984, p. 102-116.
Physics
2
Chronology, Lunar Evolution, Lunar Magnetic Fields, Paleomagnetism, Basalt, Breccia, Glass, Meteoritic Damage, Regolith
Scientific paper
The NMR of lunar samples which were magnetized some time between 3.6 Ga ago and the present indicates magnetic fields which may be either of internal origin or locally generated as a result of meteorite impact. Observations obtained for the 3.5-3.0 Ga period from mare basalts suggest the presence of a weaker and possibly decreasing global field. Regolith microbreccias, some glasses, and perhaps severely shocked samples acquired their magnetization between about 3.0 Ga ago and the present, and favor interpretation in terms of a shock magnetization process that was induced by either a transient, impact-generated magnetic field or, more probably, in an amplified ambient surface field. It is concluded that while shock magnetization occurs on the moon, it is important only in a minority of the lunar samples thus far investigated.
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