Satellite magnetic anomalies related to seafloor spreading in the South Atlantic Ocean

Details Satellite magnetic anomalies related to seafloor spreading in the South Atlantic Ocean Satellite magnetic anomalies related to seafloor spreading in the South Atlantic Ocean

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.2765p&link_type=abstract

Geophysical Research Letters, Volume 27, Issue 17, p. 2765-2768

Physics

Geophysics

8

Geomagnetism And Paleomagnetism: Magnetic Anomaly Modeling, Geomagnetism And Paleomagnetism: Spatial Variations Attributed To Seafloor Spreading, Marine Geology And Geophysics: Plate Tectonics

Scientific paper

Oceanic magnetic anomalies have been observed from satellite. The strongest anomalies are the long-wavelength components of the sea-floor spreading signature. Unfortunately, because of technical issues involving the treatment of satellite magnetic data, these signals are obscured in the South Atlantic Ocean because they trend north-south. However, a map does exist in which such features are observed, essentially because of a better data processing technique. Further, this map agrees with a physically motivated model based on non-satellite magnetic input. Hence, with properly treated data, the magnetic anomaly maps should be useful for saying something about the geology, rather than vice-versa. This situation will be considerably improved by ongoing advances in methods and new data sets. The amplitude of the observations, a factor of two larger than previous estimates, confirms that the extrusive basaltic layer alone is inadequate to produce the signal and that deeper oceanic sources are required.

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