Joint analysis of the magnetic field and total gradient intensity in central Europe

Abstract

Abstract. In the European region, the magnetic field at satellite altitudes (∼350 km) is mainly defined by a long-wavelength magnetic low, called the Central European Magnetic Low (CEML) here, located to the southwest of the Trans-European Suture Zone (TESZ). We studied this area through a joint analysis of magnetic and total gradient (∇T) anomaly maps for a range of different altitudes of 5, 100 and 350 km. Tests on synthetic models showed the usefulness of the joint analysis at various altitudes to identify reverse dipolar anomalies and to characterize areas in which magnetization is weak. This way we identified areas where either reversely or normally magnetized sources are locally dominant. At a European scale these anomalies are sparse, with a low degree of coalescence effect. The ∇T map indeed presents generally small values within the CEML area, indicating that the Paleozoic Platform is weakly magnetized. At 350 km of altitude, the TESZ effect is largely dominant: with intense ∇T highs above the East European Craton (EEC) and very small values above the Paleozoic Platform, this again denotes a weakly magnetized crust. Small coalescence effects are masked by the trend of the TESZ. Although we identified sparsely located reversely magnetized sources in the Paleozoic Platform of the CEML, the joint analysis does not support a model of a generally reversely magnetized crust. Instead, our analysis strongly favors the hypothesis that the CEML anomaly is mainly caused by a sharp contrast between the magnetic properties of the EEC and Paleozoic Platform.

Magnetic and GPR Data Modelling via Multiscale Methods in San Pietro in Crapolla Abbey, Massa Lubrense (Naples)

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Magnetic Anomalies of the Tyrrhenian Sea Revisited: A Processing Workflow for Enhancing the Resolution of Aeromagnetic Data

“…The transformed anomalies can be directly used for qualitative interpretation of largescale airborne/satellite datasets analyzed in regional studies of magnetic anomalies [59,60]. In some cases, they may be used to identify areas of special interest worth magnetic exploration by a high-resolution shipborne survey.…”

Geophysical Study of the Diendorf-Boskovice Fault System (Austria)

“…Geophysical active methods and passive methods can yield quick and effective information on the subsoil characteristics and/or rupture planes, thus highlighting interesting areas to be possibly studied in detail. Among a wide range of methods used for geological interpretation, airborne magnetic and gravimetric surveys, along with electromagnetic and radiometric investigations, have a central role for the characterization of the subsurface and to constrain 2D and 3D modeling of geological structures (e.g., [1][2][3][4][5][6][7][8]).…”