Discussion
Self potential method is the most suitable method for prospecting of :
Answer: B
Self potential is most suitable for sulphide ore bodies.
A sulphide body such as pyrite, chalcopyrite or graphite that straddles the water table acts like a natural battery. Oxidation at the top and reduction below drive a current, so a strong negative potential anomaly, often a few hundred millivolts, appears on the surface above it. The SP method measures this with two non-polarising electrodes and a voltmeter.
Carbonate and silicate ore bodies are poor electronic conductors and do not generate such potentials. Iron oxide ores (the paper's 'Ferruginous ove bodies') are usually found by magnetic surveys, since magnetite is strongly magnetic.
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