Fedi and Abbas (2013) present an imaging algorithm (the so-called depth from extreme points [DEXP] method) for the fast localization of ore bodies from self-potential (SP) data recorded at the ground surface of the earth. Their method is based on the upward continuing of the field to several altitudes and then multiplying the continued data with a scaling law of those altitudes. They claim that the position of the ore body can be better retrieved by applying the DEXP approach to the SP data and that their algorithm should be preferred because of its speed. This approach, initially developed for...
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