MAGNITOACOUSTIC EMISSION OF MAGNETITE ORES OF COMPLEX GENESIS

Abstract

The first measurements of magnitoacoustic emission (MAE) of natural ferrimagnetics were carried out in a magnetite monocrystal of nearly stoichiometric composition. The present paper is devoted to the results of the study of MAE properties of magnetite ores formed in magmatic, metasomatic, and metamorphic processes. Such ores occur in the Evstyunin deposit (Middle Urals). The MAE properties of magnetite ores from this deposit indicate the presence of several generations (stages) of their formation. Massive ores demonstrate the most prominent distinctions. The presence of sulfide mineralization is reflected in specific features (asymmetry) of MAE curves if pyrrhotite is developed. In addition, the asymmetry of MAE curves is an indicator of differences in the general magnetization of ferrimagnetics.