Lunar magnetic anomalies detected by the Apollo substatellite magnetometers

Details Lunar magnetic anomalies detected by the Apollo substatellite magnetometers Lunar magnetic anomalies detected by the Apollo substatellite magnetometers

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979pepi...20..291h&link_type=abstract

(Topical Conference on Origins of Planetary Magnetism, Houston, Tex., Nov. 8-11, 1978.) Physics of the Earth and Planetary Inter

Physics

8

Lunar Far Side, Lunar Magnetic Fields, Lunar Maps, Magnetic Anomalies, Apollo 15 Flight, Apollo 16 Flight, Interplanetary Magnetic Fields, Lunar Craters, Lunar Crust, Lunar Surface, Magnetization, Magnetometers

Scientific paper

Properties of lunar crustal magnetization thus far deduced from Apollo subsatellite magnetometer data are reviewed using two of the most accurate available magnetic anomaly maps, one covering a portion of the lunar near side and the other a part of the far side. The largest single anomaly found within the region of coverage on the near-side map correlates exactly with a conspicuous light-colored marking in western Oceanus Procellarum called Reiner Gamma. This feature is interpreted as an unusual deposit of ejecta from secondary craters of the large nearby primary impact crater Cavalerius. The mean altitude of the far-side anomaly gap is much higher than that of the near side map and the surface geology is more complex; individual anomaly sources have therefore not yet been identified. The mechanism of magnetization and the origin of the magnetizing field remain unresolved, but the uniformity with which the Reiner Gamma deposit is apparently magnetized, and the north-south depletion of magnetization intensity across a substantial portion of the far side, seem to require the existence of an ambient field, perhaps of global or larger extent.

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