EGU23-16132, updated on 03 Apr 2024
EGU General Assembly 2023
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Multiscale imaging of low-enthalpy geothermal reservoir of the Phlegraean Fields caldera from gravity and resistivity data.

Maurizio Milano1, Giuseppe Cavuoto2, Alfonso Corniello3, Vincenzo Di Fiore2, Maurizio Fedi1, Nicola Massarotti4, Nicola Pelosi2, Michele Punzo2, Daniela Tarallo2, Gian Paolo Donnarumma5, and Marina Iorio6
Maurizio Milano et al.
  • 1University of Naples Federico II, Federico II, Earth, Environment and Resources Sciences, Naples, Italy (
  • 2Istituto di Scienze del Patrimonio Culturale - Consiglio Nazionale delle Ricerche, Naples, Italy
  • 3University of Naples Federico II, Dipartimento di Ingegneria civile, edile e ambientale, Naples, Italy
  • 4Università degli Studi di Napoli Parthenope, Naples, Italy
  • 5Graded S.p.A., Naples, Italy
  • 6Istituto di Scienze Marine - Consiglio Nazionale delle Ricerche, Naples, Italy

The central‐eastern sector of the Phlegraean Fields caldera, southern Italy, is one of the most intensely studied and monitored volcanic active area of the word. This area reveals typical characters of a high‐ enthalpy geothermal systems. However, recently the presence of two different geothermal reservoirs has been outlined: one located in the central sector dominated by highly active vapours generated by episodic arrival of CO2‐rich magmatic fluids and the other one located in the eastern sector (Agnano zone) characterized by a shallow (400-500 m b.s.l.) still hot reservoir, heated by the upward circulation of deep no magmatic hot vapor.

In this study we present preliminary results deriving from the integration of different geophysical surveys carried out in the Agnano plain area, in the frame of the GEOGRID research project. We acquired high-resolution gravity data along two parallel profiles and we investigated the depth, shape and density contrast of the subsurface structures by the CompactDEXP (CDEXP) method, a multiscale iterative imaging technique based on the DEXP method. The resulting density models, together with DC resistivity and stratigraphic data, outlines the presence of a complex morphology of the Agnano subsoil characterized by a horst-graben structure. The importance of the structural lines identified by geophysical data, is also confirmed by the alignment of correlate outcropping thermal waters.

How to cite: Milano, M., Cavuoto, G., Corniello, A., Di Fiore, V., Fedi, M., Massarotti, N., Pelosi, N., Punzo, M., Tarallo, D., Donnarumma, G. P., and Iorio, M.: Multiscale imaging of low-enthalpy geothermal reservoir of the Phlegraean Fields caldera from gravity and resistivity data., EGU General Assembly 2023, Vienna, Austria, 23–28 Apr 2023, EGU23-16132,, 2023.