Инд. авторы:	Krivolutskaya N., Tolstykh N.D., Kedrovskaya T., Naumov K., Kubrakova I., Tyutyunnik O., Gongalsky B., Kovalchuk E., Magazina L., Bychkova Y., Yakushev A.
Заглавие:	World-class PGE-Cu-Ni Talnakh deposit: New data on the structure and unique mineralization of the south-western branch
Библ. ссылка:	Krivolutskaya N., Tolstykh N.D., Kedrovskaya T., Naumov K., Kubrakova I., Tyutyunnik O., Gongalsky B., Kovalchuk E., Magazina L., Bychkova Y., Yakushev A. World-class PGE-Cu-Ni Talnakh deposit: New data on the structure and unique mineralization of the south-western branch // Minerals. - 2018. - Vol.8. - Iss. 4. - Art.124. - ISSN 2075-163X.
Внешние системы:	DOI: 10.3390/min8040124; РИНЦ: 35498163; SCOPUS: 2-s2.0-85047866787; WoS: 000434883100004;
Реферат:	eng: The Talnakh deposit is one of the largest PGE-Cu-Ni deposits in the world. It is located inside the North-Western part of the Siberian Trap province and consists of three branches. The problem of massive ore origins has been discussed for several decades. The structure of the South-Western branch and the mineralogy of related its Cu-rich ore are discussed in this article. The Southern 2 orebody has a deep inclination (45°) inside the intrusive body, close to its wall, in contrary to the horizontal orebodies of the North-Eastern branch. Mineral composition of the Southern 2 orebody differs from the composition the other orebodies of the Talnakh intrusion as well. It consists ofchalcopyrite, pentlandite with subordinate cubanite, and pyrrhotite. Its specific feature is a large amount of bornite and chalcocite. These minerals occur in disseminated and massive ores. The ores of the other branches of the Talnakh intrusion have chalcopyrite-pyrrhotite compositions whilethe Southern 2 massive ore is enriched in Cu (19.03–25.8 wt %; Cu/Ni = 3.8–8.6) and PGE: ΣPGE changes from 39.1 to 279 ppm, Pd/Pt = 1.3–32. Twelve minerals of the systems Pd-Sn-Cu, Pd-Pb-Bi, Pd-Ni-As, Au-Ag-Pd-Cu, and intermetallics of the Pt-Fe-Cu-Ni types were discovered in ores, but are also widespread in other orebodies. Isoferroplatinum, sperrilite and cooperitewere not found. The unusual structure and composition of the Southern 2 orebody suggest its origin from a separate magma impulse. The correlation between disseminated and massive ores of the Southern 2 orebody in term of chemical and mineralogical composition is evidence of the formation of massive oresin situ, without displacement along the bottom of the massif. © 2018 by the authors. Licensee MDPI, Basel, Switzerland.
Ключевые слова:	PGE-Cu-Ni ores; Massive ore origin; Gabbro-dolerites; Norilsk area; Talnakh;
Издано:	2018
Физ. характеристика:	124
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