HR: 1340h
AN: GP43A-0885 [Abstracts]
TI: Modeling Terrestrial And Martian Regional Magnetic Anomalies
AU: * QUESNEL, Y
EM: yoann.quesnel@univ-nantes.fr
AF: Laboratoire de Planetologie et Geodynamique, UMR-CNRS 6112, Universite de Nantes, 2, rue de la
Houssiniere, NANTES, N/A 44322
France
AU: LANGLAIS, B
EM: benoit.langlais@univ-nantes.fr
AF: Laboratoire de Planetologie et Geodynamique, UMR-CNRS 6112, Universite de Nantes, 2, rue de la
Houssiniere, NANTES, N/A 44322
France
AU: Galdeano, A
EM: galdeano@ipgp.jussieu.fr
AF: Laboratoire de Geomagnetisme et Paleomagnetisme, UMR-CNRS 7577, Institut de Physique du Globe de Paris,
4, place Jussieu, Paris, N/A 75005
France
AU: SOTIN, C
EM: christophe.sotin@univ-nantes.fr
AF: Laboratoire de Planetologie et Geodynamique, UMR-CNRS 6112, Universite de Nantes, 2, rue de la
Houssiniere, NANTES, N/A 44322
France
AB:
Characterizing crustal magnetic sources provides key information to better understand the evolution of core and crust. The
present study investigates Mars' and Earth's crustal magnetic anomalies. Forward and
inverse methods are used. On Earth, both low- and high-altitude measurements are available, whereas only high-altitude data
are on Mars. The method is first applied to aeromagnetic measurements acquired over the Armorican Massif (Brittany, France).
Comparison with other geophysical studies and geological information provides constraints on the geometry of the magnetic
anomaly and the magnetic carriers. This is a good test to compare the signal obtained at low- and high-altitude. It allows us
to discuss the validity of our study of martian magnetic anomalies above the Terra Sirenum area, where only satellite
measurements are available. Implications for the processes responsible for the strong martian crustal remanent magnetization
are also presented.
DE: 1517 Magnetic anomalies: modeling and interpretation
DE: 1595 Planetary magnetism: all frequencies and wavelengths
DE: 5440 Magnetic fields and magnetism
DE: 6225 Mars
SC: Geomagnetism and Paleomagnetism [GP]
MN: Fall Meeting 2005