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THE ELECTROMAGNETIC RESPONSE OF A MAGNETIC IRON ORE DEPOSIT
Author(s) -
WARD STANLEY H.
Publication year - 1961
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.1961.tb01506.x
Subject(s) - magnetite , geology , eddy current , range (aeronautics) , magnetic field , mineralogy , geophysics , materials science , physics , paleontology , composite material , electrical engineering , engineering , quantum mechanics
A bstract Field experiments in the vicinity of a tabular body of nearly massive magnetite have demonstrated that the body may respond in either of two ways; it may react as a permeable mass, or it may react as an eddy current inductor, depending upon the frequency employed. If several frequencies, spanning a broad range, are employed, both types of response will be experienced. The transition from one type of response to the other would appear to have considerable significance. Based upon theoretical and empirical work to date, it seems possible to establish a relationship between transition frequency and percentage magnetite at any given section of a deposit.