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A crustal magnetization model for the magnetic field of Mars: A preliminary study of the Tharsis Region
Author(s) -
Hood L. L.,
Hartdegen K.
Publication year - 1997
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/97gl00497
Subject(s) - tharsis , geology , martian , mars exploration program , geophysics , volcano , dynamo , thermoremanent magnetization , tectonics , magnetization , geodesy , magnetic field , seismology , remanence , astrobiology , physics , quantum mechanics
Crustal magnetic field anomalies are calculated at several altitudes above the Tharsis region on Mars assuming a source region consisting of uniformly magnetized subsurface volcanic constructs. The subsurface structure is consistent with a proposed model for the evolution of the Tharsis province based on geologic and tectonic evidence. The maximum thicknesses of subsurface volcanic deposits are constrained by gravity and topography data. Mean magnetization intensities are assumed to be comparable to those of SNC meteorites. Because reversals of the former Martian dynamo are neglected, the calculated field magnitudes may represent an upper limit on actual fields to be expected above the Tharsis region. Maximum field magnitudes at 300 km altitude are in the range 1–5 nT and would be marginally detectable by an orbiting magnetometer.