P050 SOURCE POLARIZATION EFFECT IN CASE OF ELONGATED SURFACE INHOMOGENEITIES COVERING TRANSITION ZONE G. PETHŐ 1 and L. FICSÓR 2 Introduction 1 Practical CSAMT measurements are frequently made not only in the far-field zone but also in transition regime. For homogeneous earth there is a relatively smooth transition from far-field to near-field behavior. In nonhomogeneous environments this transition zone behavior becomes complex and depends upon the type of configuration separation and resistivity distribution. Special attention has to be made to resistive basement overlaid by conductive layer model which supports the reduction of plane-wave regime (Wannamaker 1997). The aim of this


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