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Pirera, F.
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Pirera, F.
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- PublicationOpen AccessA deep geoelectrical survey in the Southern Central Alps(1994-11)
; ; ; ; ; ; ; ;Alfano, L.; Dipartimento di Scienze della Terra, Università di Milano, Italy ;Lorenzoni, G.; Graduate in Geological Sciences ;Melandri, C.; Graduate in Geological Sciences ;Mocchi, M.; Graduate in Geological Sciences ;Nuttini, G.; Graduate in Geological Sciences ;Pirera, F.; Graduate in Geological Sciences ;Soffientini, M. F.; Graduate in Geological Sciences; ; ; ; ; ; A deep geoelectrical survey was carried out on the Southern Central AIps, to the north of Bergamo, by means of the “continuous polar dipole-dipole” electrode array. Among the 6 profiles executed, 4 revealed the existence of a substratum with very high resistivity values (15 000-40 000 ohm.m) and a flat not very deep upper boundary; its thickness exceeds the maximum expIoration depths of the soundings (1 to 6 km). On the grounds of general considerations and resistivity field data set, it is possible to infer that the high values should be ascribed to endogenous rather than to sedimentary rocks. A problem arises since these geophysical results are not in agreement with some geological models.123 514