On the techniques of analysing the multi-component magnetization of rocks using the Rocoma magnetometer

Abstract

The study is devoted to the interpretation procedures and laboratory techniques used in the palaeomagnetic laboratory of Geofyzika, N. C., Brno, Prague Division, in Průhonice near Prague. The newly developed demagnetization system, equipped with a sensitive ROCOMA magnetometer (Rotating Coil Magnetometer), guarantees a magnetic vacuum. Improved laboratory procedures provide for a more accurate analysis of the multi-component magnetization of rocks, qualitatively and quantitatively. The gyromagnetization effect, generated in rocks of particular physical properties when rotated in spinner magnetometers is pointed out, and the suppression of this undesirable effect is discussed. The procedures described were used to determine the palaeomagnetization in rocks which were affected by a number of phases of orogenic activity.