Some advantages and problems of a new geoelectrical prospecting method are discussed here. This<br>method is based on using a new source, the circular electric dipole (CED). The source is installed in the<br>following way. One of the transmitter poles is grounded in the central point. The other pole is uniformly<br>grounded around a radius determined by the depth of investigation desired. It can be defined as a<br>noninductive source, generating a transverse magnetic (TM) non-stationary field. CED has no magnetic<br>field of its own. It is a pure galvanic source, which differs from a loop (a pure inductive source) and from a<br>line (cable), which is both galvanic and inductive. The normal magnetic field on the earth's surface is absent<br>(within the quasi-static approximation). Taking into consideration the pronounced vertical character of the<br>currents under the central electrode and current circulation in the vertical planes we propose to term the<br>electrical prospecting technique using the CED as the ‘vertical electric current soundings method’ (VECS).<br>At present, real measurements of the magnetic components with an attached CED-array are the most<br>promising. The author consider results of the field tests.


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