Self-reversal of magnetization in a shale containing pyrrhotite
- 1 May 1962
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 7 (77) , 831-842
- https://doi.org/10.1080/14786436208212672
Abstract
A series of experiments are described on self-reversal of magnetization in a rock containing pyrrhotite. This self-reversal was produced by heat-treatment at about 320°c. Two unusual effects were observed. First, in suitable conditions the direction of magnetization could be made to change sign twice on cooling. Second, after appropriate heat-treatment the reversal mechanism became obliterated; leaving the specimen self-reversed, but containing only a single magnetic material. The second effect is of considerable interest for palaeomagnetism.Keywords
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