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THE KÖNIGSBERGER RATIO AND THE DIPPING‐DYKE EQUATION *
Author(s) -
HOOD PETER
Publication year - 1964
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.1365-2478.1964.tb01916.x
Subject(s) - remanence , magnetite , geology , magnetization , rock magnetism , magnetism , natural remanent magnetization , mineralogy , condensed matter physics , economic geology , geophysics , physics , magnetic field , metamorphic petrology , hydrogeology , geotechnical engineering , quantum mechanics , paleontology
This article deals with the effect that the Königsberger ratio, the ratio of remanent to induced magnetization, has in modifying the dipping‐dyke equation. Many reversed dykes are found on aeromagnetic maps and their presence indicates that remanent magnetism must often play a significant part in the magnetic expression of normally‐polarized dykes. The methods for the measurement of remanent magnetization and susceptibility ( k ) are outlined, and the relationship between k and volume % magnetite ( V ) is discussed. It is proposed that a good approximation is k = 0.15 ( x −1 ‐ x ), where x =1‐ V /100. The general equation for the dipping dyke, which includes the contribution of remanent magnetization, is given. A method of obtaining k from the magnetic map is also derived.