Abstract

SUMMARY A rotating magnetic field of approximately constant magnitude was used to induce a gyroremanent magnetization (GRM) in natural and synthetic rock specimens. Negligible GRM was produced in fields below 10mT but in higher fields growth was rapid. GRM was induced either parallel or antiparallel to the field rotation vector in different specimens. The results are’interpreted by extending a model for rotational remanent magnetization to include the interaction between an anisotropic rotating field and rock magnetic fabric.

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