772 



ELECTRICAL METHODS 



[Chap. 10 



Fig. 10-95 shows a syncline of slates of upper Devonian age near Meggen 

 (Sauerland, Germany). Results obtained there demonstrate the impor- 

 tance of corrections for cable and topography. If a third correction had 



Tilt 



AnqiK 



Fig. 10-94. Curve showing dip of polarization ellipse on Home ore bodies. 

 Rouyn, Quebec (after Mueser). 



BmW'^V-' 





6 -\— ' 





6,10-^ 



6 - 



'^ 



2 '^ 



Upper 



Stringoctph^tts 



Lime 



5andg sfmks. 

 Middk 

 Dtvtnkn 



Fig. 10-95. Upper curves: electromagnetic field components (in Gauss) as meas- 

 ured. Lower curves: same, corrected for cable and topographic influence, showing 

 influence of Devonian syncline (after Dieckmann). 



