Mathematics – Logic
Scientific paper
Mar 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011geoji.184.1113g&link_type=abstract
Geophysical Journal International, Volume 184, Issue 3, pp. 1113-1118.
Mathematics
Logic
1
Magnetic Anomalies: Modelling And Interpretation, Composition Of The Continental Crust, Crustal Structure, Europe
Scientific paper
Anomalies of the Earth's total magnetic field reveal important information about crustal structures. For the first time, a homogenous map of anomalies of the Earth's total magnetic field for the whole of Germany is available. The map is based on 50 shipborne, airborne and ground surveys, which were conducted between 1960 and 1990 and complemented by 17 new surveys after German reunification. The map, with a grid spacing of 100 m, consistently images the entire anomaly pattern in Germany at an altitude of 1000 m a.s.l. related to the DGRF 1980, epoch 1980.0. Because of these reference parameters and consideration of new data, the resolution of this map is higher than any previously published map. The homogenized and complete data set enables the distinction of different magnetic anomalies and - by observing their vector character - the identification of magnetic sources from different stages of the geological history. Since the map images the superposition of magnetic source anomalies from different depths and therefore combines long- and short-wavelength spectrums within one data set, it offers new insights into crustal structures. Not only regional tectonic units, such as the Variscan terranes in south and central Germany, or the extent of old Scandinavian crust under North Germany, as a relict of the collision between Baltica and Avalonia are imaged, but also details of local structures such as the volcanic areas of the Vogelsberg and the Eifel region. Therefore, the new data set can be used for work on modern topics in geosciences that cover both fundamental and applied research - for example, the structural and petrophysical characterization of the crust, its rheology and geodynamic evolution, or even hydrocarbon exploration. The gridded data is available as an electronic supplement to this paper.
Gabriel Gerald
Krawczyk Charlotte M.
Lindner Harald
Pucher Rudolf
Scheibe Reiner
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