MAGNETIC AND STRUCTURAL PROPERTIES OF THE NORILSK TYPE ORES CONTAINING COPPER, NICKEL, COBALT

Using the magnetic methods, X-ray and Mossbauer spectroscopy, scanning electron microscopy, there were studied the samples of Norilsk type ores in order to identify compounds containing Cu, Ni, Co. The samples have a complex and diverse composition of a wide range of values having the remanent magnetization and its resistance to various demagnetizing factors. The presence of steps and peaks on thermomagnetic curves indicates the presence of a mechanical mixture of two or more ferrimagnetic phases. It is confirmed by the discrepancy of the Curie temperature in the "heating-cooling" cycle. The research showed that iron and sulfur are spread irregularly over the scanned area. There are areas, strongly enriched by Cu. The presence of the native elements and the characteristic structures of the solid solutions decomposition testify to the reducing mode of ore formation processes in a wide temperature range. The presence of characteristic structures of solid solutions "pyrrhotite-pentlantide", "pyrrhotite-chalcopyrite" indicates the nature of high-temperature crystallization of sulfide ore in a wide range of temperatures.