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COMBINED SOUNDING‐PROFILING RESISTIVITY MEASUREMENTS WITH THE THREE‐ELECTRODE ARRAYS *
Author(s) -
KAROUS M.,
PERNU T. K.
Publication year - 1985
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.1985.tb00445.x
Subject(s) - depth sounding , profiling (computer programming) , electrical resistivity and conductivity , geology , igneous petrology , economic geology , regional geology , electrical conductor , geophysics , dipole , mineralogy , computational physics , hydrogeology , materials science , physics , engineering geology , volcanism , computer science , seismology , geotechnical engineering , tectonics , telmatology , oceanography , quantum mechanics , composite material , operating system
A combination of DC‐resistivity sounding and profiling measurements can be used to obtain the maximum information about distribution of resistivities in the earth. Combined sounding‐profiling measurements with the AMN, MNB arrays are considered. The resistivity data from such measurements can be presented as: (a) normal sounding curves, (b) combined sounding‐profiling curves, (c) profiling curves, (d) pseudo‐sections, or as transformations obtained by the so‐called gradient processing, to emphasize the influence of the target objects. The examples chosen from numerical modeling and field tests show the efficiency of measurements with three‐electrode arrays to accurately locate thin conductors and contacts of lithological units of different resistivities. An interpreted cross‐section is compared with the results of other geophysical measurements (VLF‐R, dipole EM, Δ, IP) showing good correlation.