Physics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja....13955a&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #13955
Physics
Scientific paper
I investigate the thermo-remanent magnetization (TRM) of the Martian lithosphere assuming that the upper lithosphere acquired TRM in the early history of the planet when the core field existed, whereas the lower lithosphere has been gradually magnetized as it cooled below the Curie temperature (taken to be 600^oC) in the presence of the magnetic field of the upper lithosphere. A potentially magnetic lithosphere of 100 km thickness is adopted. The magnetization of the lower lithosphere is relatively weak in the case where the magnetic properties of the Martian lithosphere are taken to be similar to that of the extrusive basalt near the oceanic ridge axes on Earth. However, if the Martian lithosphere is taken to be more magnetic, e.g., by an order of magnitude, then the lower lithosphere can acquire appreciable magnetization and contribute significantly to the observed magnetic anomalies. I also examine a lithospheric model with a strongly magnetic layer beneath the crust, representing an ilmenite-rich layer that has probably coupled to the crust due to fast cooling of the planet. The layer was not magnetized by the core field because it was hotter than the Curie temperature when the core dynamo was active. It acquired magnetization later in the presence of the magnetic field of the crust. It is shown that such a layer can have appreciable magnetic sources if it contains the strongly magnetic hematite-ilmenite lamellae.
No associations
LandOfFree
Thermo-remanent magnetization of Martian lithosphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Thermo-remanent magnetization of Martian lithosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermo-remanent magnetization of Martian lithosphere will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-846017