G - Physics – 01 – V
Patent
G - Physics
01
V
324/7
G01V 3/16 (2006.01) G01V 3/165 (2006.01)
Patent
CA 1161900
Abstract The present invention relates to a method and appara- tus for determining the electrical conductivity of the ground, particularly in connection with aerial prospecting, with the use of a transmitter unit (S) and a receiver unit (M) located at a distance from said transmitter unit and particularly carried by an aircraft (21). The transmitter is arranged to generate an electromagnetic field which in- duces an electric current in the ground, and the receiver is arranged to measure magnetic and electric fields induced by said current at the measuring site, said fields represen- ting a measurement of said electrical conductivity and variations therein. The magnet field from the transmitter is transmitted horizontally as is directed transversally of an imaginary line that connects the transmitter (S) with the receiver (M). The electric field E from the transmitter is measured in the receiver in a radial direction to the transmitter. The magnetic field H is measured in a direc- tion parallel with the magnetic transmitter-field. Of the measured maqnitudes E and H the ratio E/H and/or the phase difference ? are formed, both of which are dependent on the electrical conductivity of the ground.
364512
Boliden Aktiebolag
Gowling Lafleur Henderson Llp
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