Cüruf ve asitli galerilerin self potansiyel tevlit ettikleri malûmdur, Bunların mevcut olduğu maden, bölgelerinde elde edilen self potansiyel anomalilerinin tefsiri gayri hassas ve bazan da imkânsız olmaktadır, Bu iki tesirin total anomaliden çıkarılarak geri kalan kısmının tefsiri icabetmektedir.

İt is well known that the existence of slag heaps and galleries containing acid waters, near sulphide deposits, make It extremely difficult, If not impossible, to Interpret the self potential measurements .taken around them. This is due to the generation of self potentials by the slags and wet galleries, having magnitudes of the same order as those given. by the deposit itself. Hence, the elimination of such effects from the total anomaly is essential for an intelligible interpretation of the total anomaly.