In Situ Determinations and Statistical Analysis of Magnetic Susceptibilities of Basalts of the Faroe Islands

Abstract

The concept of magnetic susceptibility is shortly reviewed in the light of geophysics. A susceptibility meter is described and the basis for design of the instrument is examined. 200 determinations of magnetic volume susceptibility of the Faroese basalts are presented. Generally, it can be said that basalts of the lower series seem to have a higher susceptibility than basalts of the middle series. A statistical analysis shows that with a level of significance of 5 °/o the 200 determined values follow a logarithmic normal distribution. It is thus proposed that normally susceptibility data may be analysed by the logarithmic
normal distribution.