Deep Schlumberger sounding and the crustal resistivity structure of central Australia

Three 200 km Schluniberger resistivity soundings have been conducted over the central Australian shield, using telephone lines to obtain the large electrode spacings. These represent the first crustal scale controlled source electrical study t o be carried out in this continent. A computer controlled data acquisition system was used which allowed precise measurements t o be made with only modest emission currents (0.1 -0.5 A).