Scientific journal
Scientific Review. Geographical Sciences

MAGNETIC PROPERTIES OF MAGNETITE ORES FROM THE OMOLON MASSIF (MAGADAN REGION)

Иванов Ю.Ю., Колесов Е.В., Пеньевский С.Д., Третьякова Н.И.
Petromagnetic properties of magnetite ores from the Omolon Massif (Magadan region) were studied. Thermomagnetic analyses including high temperature (up to 700°C) dependence of magnetic susceptibility and saturation magnetization were used to diagnostic of magnetic minerals. Magnetite with Curie point – 580°C, maghemite and hematite were identified. Magnetic hysteresis data shows multi domain particles. There is positive correlation between Fe2O3 content and magnetic susceptibility and density. Ores has high values magnetic parameters. Value of is up to 1196.362 A/m, magnetic susceptibility value is up to 2.388 SI. The natural remanent magnetization is easily destroying by alternating magnetic field. The median destructive field is less 5 mT. There are different directions of the remanent magnetization which can be sources of negative and positive anomalies and complicates of magnetic anomaly interpretations.