An altitude-normalized magnetic map of Mars and its interpretation

M. Purucker, D. Ravat, H. Prey, G. Voorhies, T. Sabaka, M. Acuña

Research output: Contribution to journalArticlepeer-review

150 Scopus citations

Abstract

Techniques developed for the reduction and analysis of terrestrial satellite magnetic field data are used to better understand the magnetic field observations made by Mars Global Surveyor. A global distribution of radial (Br) magnetic field observations and associated uncertainties is inverted for an equivalent source magnetization distribution and then used to generate an altitude- normalized map of Br at 200 km. The observations are well-represented by a potential function of crustal origin, consistent with a remanent origin for the Martian magnetic features. The correlation between the 40546 Br observations and Br calculated from the magnetization solution at observation locations is 0.978. For a magnetization distribution confined to a 50 km layer, calculated magnetizations range from -22 to +17 A/m. We see correlations with tectonics that were only hinted at in earlier maps. Magnetic features appear to be truncated against Valles Marineris and Ganges Chasma, suggestive of a major change in crustal properties associated with faulting.

Original languageEnglish
Pages (from-to)2449-2452
Number of pages4
JournalGeophysical Research Letters
Volume27
Issue number16
DOIs
StatePublished - Aug 15 2000

ASJC Scopus subject areas

  • Geophysics
  • General Earth and Planetary Sciences

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