The moon - Sources of the crustal magnetic anomalies

Details The moon - Sources of the crustal magnetic anomalies The moon - Sources of the crustal magnetic anomalies

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979sci...204...53h&link_type=abstract

Science, vol. 204, Apr. 6, 1979, p. 53-57.

Computer Science

27

Lunar Craters, Lunar Crust, Lunar Magnetic Fields, Magnetic Anomalies, Apollo 16 Flight, Ejection, Low Altitude, Magnetic Measurement, Solar Wind, Apollo 15, Cayley Formation, Surface, Lunar, Moon, Crust, Magnetic Anomalies, Apollo 16, Maria, Reiner, Magnetism, Magnetometers, Ejecta, Nearside, Procellarum, Oceanus, Magnetization, Fra Mauro, Kepler, Copernicus, Samples

Scientific paper

Evidence from low altitude Apollo 16 subsatellite magnetometer measurements of the lunar near side is presented showing that basin and crater ejecta are major sources of lunar magnetic anomalies. It is found that anomalies increase in amplitude and complexity with a decrease in altitude, indicating localized, near surface sources, but it is also found that anomalies are less intense and numerous over maria than over highlands. Also, few anomalies are found to be associated with young craters, eliminating direct shock magnetization as a possible cause, but numerous anomalies are present over formations not flooded by mare basalts. The largest observed anomaly is well correlated with the location of a conspicuous deposit, believed to be crater ejecta, with a mean magnetization level of 5.2 + or - 2.4 x 10 to the -2 electromagnetic units/g. It is also concluded that the magnetization of the lunar crust must have taken place over a period of over one billion years.

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