Open AccessA deep geoelectrical survey in the Southern Central Alps
Author(s) -
L. Alfano,
G. Lorenzoni,
C. Melandri,
M. Mocchi,
G. Nuttini,
F. Pirera,
M. F. Soffientini
Publication year - 1994
Publication title -
annals of geophysics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 60
eISSN - 2037-416X
pISSN - 1593-5213
DOI - 10.4401/ag-4166
Subject(s) - geology , sedimentary rock , electrical resistivity and conductivity , dipole , polar , ohm , geophysics , boundary (topology) , geomorphology , mineralogy , paleontology , physics , mathematical analysis , mathematics , quantum mechanics , astronomy
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