Magnetic field gradients from the ST-5 constellation: Improving magnetic and thermal models of the lithosphere

Details Magnetic field gradients from the ST-5 constellation: Improving magnetic and thermal models of the lithosphere Magnetic field gradients from the ST-5 constellation: Improving magnetic and thermal models of the lithosphere

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3424306p&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 24, CiteID L24306

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5

Geomagnetism And Paleomagnetism: Instruments And Techniques, Geomagnetism And Paleomagnetism: Magnetic Anomalies: Modeling And Interpretation, Geomagnetism And Paleomagnetism: Spatial Variations: All Harmonics And Anomalies, Geomagnetism And Paleomagnetism: Satellite Magnetics: Main Field, Crustal Field, External Field, Geomagnetism And Paleomagnetism: Planetary Magnetism: All Frequencies And Wavelengths

Scientific paper

We report the development of a new technique (magnetic gradiometry) for satellite-based remote sensing of the lithosphere. The measurements reported here represent the first systematic measurements of lithospheric magnetic field gradients, and were collected from a spinning spacecraft. The three-satellite ST-5 mission collected vector magnetic field observations at 300-800+ km altitudes over mid and high-northern latitudes in 2006. Away from the auroral oval, and over the continents, the gradients of the low altitude (<400 km) total anomaly field are dominated by lithospheric magnetic fields. Using a seismic starting model, and magnetic field observations from ST-5 and other recent satellite missions, we demonstrate how these techniques can be used to improve our knowledge of the processes involved in the thickened crust of the Colorado Plateau and the Sierra Madre Occidental.

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