On the possibility of single-domain/pseudo-single-domain magnetic particles existing in the lower crust of Mars: Source of the strong magnetic anomalies

Details On the possibility of single-domain/pseudo-single-domain magnetic particles existing in the lower crust of Mars: Source of the strong magnetic anomalies On the possibility of single-domain/pseudo-single-domain magnetic particles existing in the lower crust of Mars: Source of the strong magnetic anomalies

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jgre..11012009a&link_type=abstract

Journal of Geophysical Research, Volume 110, Issue E12, CiteID E12009

Other

9

Planetary Sciences: Solar System Objects: Mars, Planetary Sciences: Solid Surface Planets: Magnetic Fields And Magnetism, Planetary Sciences: Solid Surface Planets: Composition (1060, 3672)

Scientific paper

This paper shows that single-domain or pseudo-single-domain (SD/PSD) magnetite grains can exist in the upper 30-45 km of the Martian crust. The upper ~50 km of the Martian crust have likely formed by volcanic eruptions on a stagnant lithosphere. A given lava flow cools very rapidly at the surface but is then gradually heated up through burial heating as it is overlain by other successive flows. The thermal evolution models of a lava flow show that its temperature remains below the magnetic blocking temperatures of magnetite, 480-580°C, until it reaches ~30-45 km depth. The highly magnetic SD/PSD magnetite grains can easily explain the strong magnetic anomalies of Mars; less than 1% by volume of magnetite particles is sufficient.

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