Verification of inferred faults by resistivity analysis. Technical progress report, July 17-October 31, 1981 Page: 12 of 19
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displacement would be in the same direction as the 750 ft. relocation that would
be required at Highway 403 and 269, where a significant scintillation high was
found.
G. Along Kentucky Highway 269 for 400 m either side of Schultztown.
This was also a continuous scinitllation traverse using the aural output, and
recording anomalous highs. This traverse was across the Landsat lienament which
also crossed Highway 403. At a location approximately 250 m south of Schultztown
a modest scintillation high was found ( 35 c/s vs 20-25 c/s along the rest of the
traverse). This location corresponds to that of the Landsat lineament.
Discussion
To attain the goal of this work, the planned approach was to use high-powered
(3KW) resistivity measurements in a dipole-dipole configuration to penetrate
deeply—a rather expensive procedure.
Toward this end it was decided to make a preliminary investigation as
discussed above, using a scintillation counter in addition to a low-current
resistivity measuring instrument. Based on the above results, a decision has been
made to peform at least one further preliminary investigation.
The scintillation counter gave more definite indication of known faults
than did the resistivity measurements. The South Graham, North Graham, and
the fault at Highways 403-269 were all indicated on one traverse by scintillation
measurements, but only the North Graham fault was indicated by resisitivity,
and the resistivity profile was not conclusive.
The reason for the inconclusive resistivity result may have been the fact
that the fault zones in this region are often thin, sometimes a matter of a few
inches. A crush zone is almost non-existent. With the 91 m A-spacings used in a
Wenner configuration, the anomalous part of the fault may not have been substantial
enough to affect the resistivity measurements significantly. Of course, thin
fault zones might also give problems for a deep resistivity survey.
8
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Jackson, P.L. Verification of inferred faults by resistivity analysis. Technical progress report, July 17-October 31, 1981, report, January 1, 1981; United States. (https://digital.library.unt.edu/ark:/67531/metadc1070177/m1/12/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.