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Authors: Di Giuseppe, Maria Giulia* 
Troiano, Antonio* 
Di Vito, Mauro Antonio* 
Somma, Renato* 
Matano, F.* 
Title: Definition of small-scale volcanic structures by electrical resistivity tomography: The Trentaremi cone, an example from the Campi Flegrei Caldera (Italy)
Issue Date: 2017
Series/Report no.: /60 (2017)
DOI: 10.4401/ag-7397
Keywords: Volcanology
Magnetic and electrical methods
Subject Classification04.02. Exploration geophysics 
Abstract: Small-scale buried structures in volcanic environments could present an extreme relevance, due to their link to the eruptive activity of in- dividual monogenetic edi ces, but require, to be detected, a high-reso- lution geophysical imaging. In such context, the Electrical Resistivity Tomography is often able to recover primary knowledge about the heterogeneity of the buried layers, despite the reduced investigation depth. In this paper an example of such matter is proposed, concern- ing the Posillipo hill, in the southeastern sector of the Campi Flegrei Caldera (Italy), where an electrical resistivity survey has been car- ried out in the roman age Seiano tunnel. In such a way, details of the Trentaremi tuff cone buried structure have been revealed, with a maximum depth of exploration of about 100 m. The obtained re- sults have been compared with geological observations on the exposed rocks, interpreting their underground continuation. The geophysical image reconstructs the inner structure of the Trentaremi cone. At the same time, its relationships with respect to the deposits belonging to Neapolitan Yellow Tuff eruption have been highlighted. Reconstruct- ing this stratigraphic sequence, indications about the past volcanic dynamics have been obtained, presenting valuable implications for the future activity forecasting.
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