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The lithospheric structure of the Alpine-Pannonian-Carpathians-Dinarides system: Inferences from P and S receiver function analyses

Urheber*innen

Kalmár,  Dániel
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Petrescu,  Laura
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Hetényi,  György
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Stipčević,  Josip
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Balázs,  Attila
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Bondár,  István
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Kovács,  János István
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Zitation

Kalmár, D., Petrescu, L., Hetényi, G., Stipčević, J., Balázs, A., Bondár, I., Kovács, J. I. (2023): The lithospheric structure of the Alpine-Pannonian-Carpathians-Dinarides system: Inferences from P and S receiver function analyses, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-0673


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016821
Zusammenfassung
We perform a comprehensive P-to-S and S-to-P receiver function analyses to determine the depth of lithospheric discontinuities in the Eastern Alps, Pannonian Basin, Carpathians, and the Dinarides. The Pannonian Basin of Central Europe hosts thick sedimentary deposits of up to 7 km thickness in extensional half-graben geometries overlying the crystalline orogenic basement. Prior to this study, the mapping of the seismic discontinuities in the lithosphere beneath the investigated area was not uniform and the estimated depth values bore non-negligible uncertainties. Owing to the combined, dense station coverage of more than 380 seismological stations we can achieve hitherto unprecedented spatial resolution. Our study is based on two decades (2002–2022) of broadband waveforms with uniform automatic waveform processing and quality control procedures. This detailed procedure provides new geological and geophysical information about the lithosphere of the region. The obtained results allow us to infer a 3D lithospheric structural model of the region. We have developed a new interpolation and visualization algorithm. We mapped the thickness of the main crustal layers and the lithosphere, together with an estimate of their uncertainties. We present the sedimentary thickness map, the first Conrad depth map and an improved, detailed Moho map, the first upper and lower crustal thickness maps, as well as the lithospheric (Lithosphere-Asthenosphere-Boundary and Mid-Lithospheric-Discontinuity) thickness map obtained from receiver function analysis. We show migrated Common Conversion Point cross-sections beneath the Pannonian Basin and Carpathians, and the Eastern Alps–Pannonian Basin transition zone. Finally, we compare and jointly interpret the results of the receiver functions with previous geophysical investigations and seismic tomography models.