Objective
The purpose of the project is to study, how polarization processes in rocks influence the results of electromagnetic prospection methods, notably of electromagnetic soundings. Some of the observed phenomena cannot be explained if polarization processes in the rocks are neglected, e.g. negative values in the decay response curves of transient coincident loop methods and high resolution of electromagnetic soundings.
For the complete investigation of the problem it is necessary to have reliable data on electromagnetic properties of rocks over a wide frequency range. However, data about the frequency dispersion of different electrical parameters are still rare. Therefore it is one of the central tasks of the project to extend significantly our knowledge of the frequency dispersion of different rocks both by means of laboratory studies of rock samples and by a theoretical analysis of the problem. On the basis of the data obtained, the influence of polarization processes on electromagnetic prospecting methods, particularly on transient electromagnetic field soundings, will be investigated. It is expected that the results of these studies will allow us to substantiate a new field procedure for transient electromagnetic fields and a new method of data interpretation, which will permit a separation of conduction and polarization effects and thus will yield a substantial increase of the information content of transient electromagnetic data.
Call for proposal
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38106 Braunschweig
Germany