
TY  - JOUR
A1  - Purss, M.B.J. 
A1  - Cull, J.P. 
T1  - B-field probes for downhole magnetometric resistivity surveys
JF  - Exploration Geophysics
JO  - Explor. Geophys.
Y1  - 2003
VL  - 34
IS  - 4
SP  - 233
EP  - 240
KW  - 
UR  - https://doi.org/10.1071/EG03233 
N2  - The downhole magnetometric resistivity (DHMMR) method relies on the measurement of low-amplitude (~100 pT), low-frequency (1?4 Hz) magnetic fields arising from galvanic current flow in the Earth. Normal magnetic sensors have been used extensively in surface magnetometric resistivity (MMR) surveys, but equivalent B-field probes have not been generally available for use in standard mineral exploration drillholes. However, recent advances in magnetic sensor design have led to the manufacture of B-field probes, which provide significant advantages over the alternative TEM probes for DHMMR surveys. Synthetic and laboratory examples highlight the differences between data acquired from B-field and TEM probes. Field examples from the Flying Doctor Prospect, near Broken Hill, New South Wales, demonstrate the improved resolution achieved by using a B-field probe for DHMMR surveys. 
ER  -

