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THEORETICAL RESISTIVITY ANOMALIES ACROSS A SINGLE VERTICAL DISCONTINUITY
Author(s) -
ALCHALABI MAHBOUB
Publication year - 1969
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.1365-2478.1969.tb02072.x
Subject(s) - discontinuity (linguistics) , electrical resistivity and conductivity , electrode , geology , gemology , geometry , materials science , engineering geology , physics , mathematics , mathematical analysis , seismology , quantum mechanics , volcanism , tectonics
A bstract Electrical resistivity anomalies of a symmetrical four‐electrode co‐linear system across a single vertical discontinuity are treated in relation to: a) the ratio of potential electrode separation to the current electrode separation that are employed in the system and b) the angle which the electrode alignment makes with the discontinuity. Several conclusions are extracted from this treatment and methods for obtaining an optimum sensitivity of the system, with respect to these parameters, are shown. Disadvantages of special arrangements, such as the Wenner configuration, are indicated. Methods are outlined to utilise variations in the apparent resistivity plot for determining the angle between the electrode alignment and the discontinuity, quantitatively or qualitatively. These variations include certain deviations from the standard curves obtained in longitudinal traverses made at right angles to the discontinuity. Also, a comparison is made between longitudinal and cross traverses, in relation to the discontinuity.