Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций
Конференция: International Multidisciplinary Scientific Geoconference (SGEM 2016); Albena, BULGARIA; Albena, BULGARIA
Год издания: 2016
Ключевые слова: ores of the Norilsk type, X-ray, Mossbauer spectroscopy, scanning electron microscopy, Cobalt, Electron microscopy, Electronic structure, Ions, Iron research, Magnetic moments, Magnetism, Magnetization, Nickel, Ores, Sulfur, Sulfur compounds, X rays, Demagnetizing factors, Local electronic structures, Maximum concentrations, Ore formation process, Remanent magnetization, Spin magnetic moments, Ssbauer spectroscopies, Wide temperature ranges, Iron compounds
Аннотация: Using the magnetic methods, the methods of X-ray and Mossbauer spectroscopy, scanning electron microscopy, there were studied the samples of Norilsk types ore in order to identify compounds containing Cu, Ni, Co. The samples have a complex composition, a wide range of values of the remanent magnetization and its stability to the diПоказать полностьюfferent demagnetizing factors. The magnetization of the sample irreversibly changes with temperature. Shape of thermomagnetic curves indicates the presence of a mechanical mixture of two or more ferrimagnetic phases. The isomer shifts of the samples range from 0 to 1,394 mm/s, quadrupole splitting ranges from 0 to 2,688 minis. This indicates that the local electronic structure depends on the genesis of compounds. There were identified the inclusions having a high content of Cu. The presence of native elements testifies to the reducing mode of ore formation processes. As an additional damaging factor there was used the heating of the samples. The replacement of magnetic ions of Fe with Co ions with nearest values of spin magnetic moment changes the magnetic stability of the samples and Curie temperature. The research conducted by using the method of scanning electron microscopy and the X-ray microanalysis showed that iron and sulfur are spread unevenly over the scanned area. Sulfur is absent in the inclusions containing Fe and Ni. There are areas, strongly enriched by Fe. There were identified the inclusions having a high content of Cu, with a maximum concentration of Ni. The presence of native elements testifies to the reducing mode of ore formation processes. Thus, most of the bulk of Cu, Ni, Co is not dissipated in the crystal lattices of the ore, but it is part of the ore sulphides. The presence of the characteristic structures of the solid solutions decomposition shows a wide temperature range of sulphide crystallization.
Журнал: 16TH INTERNATIONAL MULTIDISCIPLINARY SCIENTIFIC GEOCONFERENCE, SGEM 2016: SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING, VOL I
Номера страниц: 119-124
ISSN журнала: 13142704
Место издания: SOFIA
Издатель: STEF92 TECHNOLOGY LTD