Mathematics – Logic
Scientific paper
Sep 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.6707m&link_type=abstract
American Astronomical Society, DPS meeting #38, #67.07; Bulletin of the American Astronomical Society, Vol. 38, p.619
Mathematics
Logic
Scientific paper
Johnson and Phillips (2005) used magnetic field observations from Mars Global Surveyor (MGS), the ages of geologic units, and topographic data to provide constraints on the thermal and magmatic evolution of the Tharsis volcanic province on Mars. They conclude that Tharsis is underlain by a Noachian crust that was previously more magnetic than at present. Here, we extend these analyses to other regions and to the entire planet. We investigate the distributions of magnetic field intensities and directions (or the inferred magnetizations) as a function of geological age, where the latter is assessed via global maps of surface unit ages. Available global geological maps have higher spatial resolution (0.125°) compared with global magnetic field models ( 2° at best). The geologic data are grouped into bins of the same size as the magnetic field data and a modal age is assigned to the bin. The number of magnetic observations (magnetic field or magnetization), the mean value, standard deviation, and maximum values are computed for each bin. We test whether magnetic anomaly and/or inferred magnetization distributions are consistent with an ancient global dipolar magnetizing field. Geologic age data provide constraints on the timing of events that may have magnetized or subsequently modified the crust. Topographic data provide information related to processes that affect topography, such as uplifting. Analyses of the combined magnetic field, geologic age, and topographic data, will help to constrain regional and global models of Martian evolution. This research is supported in part by a NASA Graduate Student Research Program fellowship.
Johnson Clifton L.
Milbury Colleen A.
Schubert Gerald
No associations
LandOfFree
Regional And Global Evolution Of Mars: Insights From Geologic, Topographic, and Magnetic Field Observations 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 Regional And Global Evolution Of Mars: Insights From Geologic, Topographic, and Magnetic Field Observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Regional And Global Evolution Of Mars: Insights From Geologic, Topographic, and Magnetic Field Observations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1078162