GNGTS 2016 - Atti del 35° Convegno Nazionale

500 GNGTS 2016 S essione 3.1 simultaneously for each current injection. The crucial task was the data processing, considering the large distance between the Tx and Rx systems that strongly reduces the signal to-noise ratio. To overcome this drawback, for each quadripole position the corresponding voltage signal was filtered, stored and processed with advanced statistical packages (Colella et al. , 2004; Rizzo et al. , 2004, Tamburiello et al. , 2008). The integration of MT model and experimental DC resistivity measurements improved the knowledge on the deep structures of the Larderello field. Acknowledgements. This study is part of the EU FP7-funded Integrated Methods for Advanced Geothermal Exploration (IMAGE) Project under grant agreement n° 608553. We thank the colleagues that supported the fieldwork during the MT and DC surveys. We thank Enel Green Power for the precious technical and logistical support on carrying out the borehole experiment. References Bertani, R.: Geothermal Power Generation in the World 2010-2014, Update Report. Proceedings of World Geothermal Congress 2015, Australia. Colella A., Lapenna V., Rizzo E. (2004). High-resolution imaging of the High Agri Valley basin (Southern Italy) with Electrical Resistivity Tomography. Tectonophysics, 386, 29-40. Fiordelisi, A., Mackie, R., Manzella, A. and Zaja, A.: Electrical features of deep structures in Southern Tuscany (Italy), Annals of Geophysics (1998), 41(3), 333-341. Manzella, A.: Resistivity and heterogeneity of Earth crust in an active tectonic region, Southern Tuscany (Italy). Annals of Geophysics (2004), 47(1), 107-118. Manzella, A., Spichak, V., Pushkarev, P., Sileva, D., Oskooi, B., Ruggieri, G. and Sizov, Y.: Deep fluid circulation in the Travale geothermal area and its relation with tectonic structure investigated by a magnetotelluric survey. Proceedings, Thirty-First Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California (2006). Rizzo E., Colella, A., Lapenna, V. and Piscitelli, S. (2004). “High-resolution images of the fault controlled High Agri Valley basin (Southern Italy) with deep and shallow Electrical Resistivity Tomographies”. Physics and Chemistry of the Earth, 29, 321-327. Fig. 1 – Schematic geological map of the Larderello geothermal area, simplified from the geological maps at scale 1:10000 of Tuscany Region. 1) Quaternary deposits; 2) Neoautochthonous terrigenous deposits (Miocene-Pliocene); 3) Ligurian and sub-Ligurian Flysch complex (Jurassic-Eocene); 4) Tuscan Nappe formations (Upper Trias-Miocene); 5) Metamorphic Units (Paleozoic); 6) Remote site on Capraia Island; 7) Study area; 8) MT site acquired in IMAGE; 9) MT site previously acquired; 10) Position of surface current electrodes for the acquisition of the DERT-SHDERT; 11) Venelle 2 area.