Formation of magnetic anomalies antipodal to lunar impact basins - Two-dimensional model calculations

Details Formation of magnetic anomalies antipodal to lunar impact basins - Two-dimensional model calculations Formation of magnetic anomalies antipodal to lunar impact basins - Two-dimensional model calculations

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.9837h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, June 10, 1991, p. 9837-9846.

Other

35

Lunar Crust, Lunar Magnetic Fields, Magnetic Anomalies, Magnetohydrodynamic Waves, Two Dimensional Models, Astronomical Models, Conductivity, Lunar Craters, Seismic Waves, Solar Wind, Space Plasmas

Scientific paper

A quantitative theoretical investigation into the formation of large-scale magnetic fields and related crustal magnetization is conducted with respect to lunar basin-forming impacts. Two-dimensional models are developed to describe the partially ionized vapor cloud that results from the impacts on a lunar-sized body. Field-generation mechanisms are considered for the case of fields formed within the plasma cloud related to thermal effects and for the case of fields created outside the cloud. Lunar basin forming impacts account for existing magnetization concentrations with respect to solar-wind magnetic fields and plasmas. Basin-forming impacts can also explain crustal magnetization with respect to magnetization anomalies peripheral to impact basins. Other processes, such as a previous core dynamo and cometary impacts, are potential contributors to the lunar crustal magnetization, but a large fraction of the magnetization detected by the Apollo mission can be explained by the concentrations antipodal to the basins.

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