| Инд. авторы: | Tolstykh N.D., Shvedov G.I., Polonyankin A.A., Zemlyansky S.A. |
| Заглавие: | Mineralogical and geochemical feature of the disseminated ores of the southern part of the Noril'sk 1 deposit |
| Библ. ссылка: | Tolstykh N.D., Shvedov G.I., Polonyankin A.A., Zemlyansky S.A. Mineralogical and geochemical feature of the disseminated ores of the southern part of the Noril'sk 1 deposit // IOP Conference Series: Earth and Environmental Science. - 2018. - Vol.110. - Iss. 1. - Art.012021. - ISSN 1755-1307. - EISSN 1755-1315. |
| Идентиф-ры: | DOI: 10.1088/1755-1315/110/1/012021; РИНЦ: 35497492; SCOPUS: 2-s2.0-85040729740; WoS: 000435400500021; |
| Реферат: | eng: The new data on the composition of disseminated sulphide ore in the southern part of the Noril'sk 1 deposit are obtained. It was found that a sulfur-poor assemblage: as Fe-rich (cubanite, mackinawite) and Cu-rich (talnakhite, bornite, chalcocite, native copper) minerals due to the evolution of two different fractions of sulphide melt is characteristic of picritic gabbro-dolerite. It has been formed at relatively low sulfur activity (lgfS2 range from -12 to -11). And a high-sulfur assemblage (monoclinic pyrrhotite, pyrite and Ni-rich pentlandite) formed at higher sulfur activity (lgfS2 range from -10.5 to -10) due to the pyrrhotite-chalcopyrite fractionation of the sulphide melt is characteristic of olivine gabbro-dolerite. The ratios of Ni/Cu in the rocks decrease from picritic (Ni/Cu = 1.24 average) to olivine gabbro- dolerites (Ni/Cu = 0.69 average). But the Ni/Fe ratios in pentlandite are increasing down the cross-section due to increase of sulfur fugacity during the evolution of ore-forming system. The Pd-parageneses vary along the cross-section top down as follows: Sn → Pb → As → Bi(Te) in picritic gabbro-dolerite and Sn → Sb → As → Te(Bi) in olivine gabbro-dolerite. There is a clear correlation between the sulfide and PGM assemblage and the type of the host rocks. © Published under licence by IOP Publishing Ltd. |
| Ключевые слова: | Topdown; Sulphide ores; Ore forming systems; Mackinawite; Low sulfurs; Host rocks; Geochemical features; Tin; Sulfur compounds; Sulfur; Sulfide minerals; Silicate minerals; Rocks; Petrology; Olivine; Nickel; Iron ores; Deposits; Copper compounds; Ores; |
| Издано: | 2018 |
| Физ. хар-ка: | 012021 |
| Конференция: | Название: 9th All Russian Petrographic Conference with International Participation: Petrology of Magmatic and Metamorphic Complexes Даты проведения: 2017-11-28 - 2017-12-02 |