
TY  - JOUR
A1  - Lee, T.J. 
T1  - Depth estimation with PEM ? a cautionary note
JF  - Exploration Geophysics
JO  - Explor. Geophys.
Y1  - 1978
VL  - 9
IS  - 4
SP  - 168
EP  - 169
KW  - 
UR  - https://doi.org/10.1071/EG978168 
N2  - The method advocated by Crone (1977) for determining the position of a "current axis" for a conducting ore body will give a positive result even if there is no ore body. The depth, l, to this axis in a uniform ground of conductivity s and permeability m0 is given by: [see full text for equation]. In this expression t is time and consequently the result can be used to determine the conductivity profile of a nearly uniform ground. 
ER  -

