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Conference Paper

The deep structure of the Campi Flegrei caldera by magnetotelluric survey

Authors

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

De Paola,  Claudio
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Di Giuseppe,  Maria Giulia
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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

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

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

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Citation

Isaia, R., De Paola, C., Di Giuseppe, M. G., Natale, J., Troiano, A., Vitale, S. (2023): The deep structure of the Campi Flegrei caldera by magnetotelluric survey, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4406


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021837
Abstract
Electromagnetic imaging can proficiently detect deep structures in volcanic environments. A magnetotelluric (MT) survey has been performed in the Campi Flegrei volcanic environment, crossing the caldera through the main, recent volcano-tectonic structures and intersecting the most active sector of the Solfatra-Agnano zone. The electromagnetic reconstruction of the volcano’s internal structure points out the configuration of the plumbing system and the main structures for the ascent of magma and magmatic fluids, at least below a large continental portion of the caldera. The preliminary picture of the electrical resistivity distribution with depth suggests that the CF caldera plumbing system appears to be formed by distinct branches with a shallower geothermal system well developed below the Solfatara-Agnano area fed by a deeper source. The primary fault system, acting as a preferential pathway for magmatic fluids, is also identified. The resistivity model allows (i) to constrain the main electromagnetic features of the caldera and (ii) to delineate significant clues about its structural setting.This new picture represents a relevant contribution furnished by MT observations for hazard assessment at Campi Flegrei and can enhance the modeling of the driving mechanisms of the ongoing unrest.