Articles | Volume 15, issue 4
Nat. Hazards Earth Syst. Sci., 15, 843–852, 2015

Special issue: New observing strategies for monitoring natural and technological...

Nat. Hazards Earth Syst. Sci., 15, 843–852, 2015

Research article 13 Apr 2015

Research article | 13 Apr 2015

Magnetotelluric investigation in the High Agri Valley (southern Apennine, Italy)

M. Balasco1, A. Giocoli1,2, S. Piscitelli1, G. Romano3, A. Siniscalchi3, T. A. Stabile1, and S. Tripaldi3 M. Balasco et al.
  • 1IMAA, Istituto di Metodologie per l'Analisi Ambientale, CNR, C.da S. Loja, Z.I., 85050, Tito Scalo (PZ), Italy
  • 2ENEA, Rome, Italy
  • 3Dipartimento di Scienze della Terra e Geoambientali, Università di Bari, Campus Universitario, Via Orabona 4, 70125 Bari, Tito Scalo (PZ), Italy

Abstract. In this paper we present the result of a magnetotelluric (MT) investigation carried out across the High Agri Valley (HAV), southern Italy. Several MT soundings were carried out in order to obtain a ~15 km long 2-D resistivity model with an investigation depth of ~10 km. The main aim was to provide valuable data on the geological and structural setting of the HAV. The MT model was compared with pre-existing geological, geophysical and seismic data. The MT model can be schematized as a superposition of three stack lateral varying layers with different thickness and resistivity values: a surficial low–medium resistivity layer associated with the Quaternary deposits and to the allochthonous units; and a deeper high resistivity layer related to the Apulia Platform, separated by a thin layer connected to the mélange zone and to the Pliocene terrigenous marine deposits. Sharp lateral resistivity variations are interpreted as faults that, on the basis of accurate focal mechanism computations, display normal-faulting kinematics.

Final-revised paper