Origin of the Pd-Rich Pentlandite in the Massive Sulfide Ores of the Talnakh Deposit, Norilsk Region, Russia

Pd-rich pentlandite (PdPn) along with ore-forming pentlandite (Pn) occurs in the cubanite and chalcopyrite massive sulfide ores in the EM-7 well of the Southern-2 ore body of the Talnakh deposit. PdPn forms groups of small grains and comprises marginal areas in large crystals of Pn. The palladium co...

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Auteurs principaux:	Valery Kalugin, Viktor Gusev, Nadezhda Tolstykh, Andrey Lavrenchuk, Elena Nigmatulina
Format:	article
Langue:	EN
Publié:	MDPI AG 2021
Sujets:	Talnakh deposit massive sulfide ore Pd-rich pentlandite fluid Mineralogy QE351-399.2
Accès en ligne:	https://doaj.org/article/0b8996d97f3e4fcbb6c279f37e6b1179
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spelling	oai:doaj.org-article:0b8996d97f3e4fcbb6c279f37e6b11792021-11-25T18:26:39ZOrigin of the Pd-Rich Pentlandite in the Massive Sulfide Ores of the Talnakh Deposit, Norilsk Region, Russia10.3390/min111112582075-163Xhttps://doaj.org/article/0b8996d97f3e4fcbb6c279f37e6b11792021-11-01T00:00:00Zhttps://www.mdpi.com/2075-163X/11/11/1258https://doaj.org/toc/2075-163XPd-rich pentlandite (PdPn) along with ore-forming pentlandite (Pn) occurs in the cubanite and chalcopyrite massive sulfide ores in the EM-7 well of the Southern-2 ore body of the Talnakh deposit. PdPn forms groups of small grains and comprises marginal areas in large crystals of Pn. The palladium content in PdPn reaches up to 11.26 wt.%. EDS elemental mapping and a contour map of palladium concentrations indicate distinct variations in the palladium content within and between individual grains. Palladium distribution in the large grains is uneven and non-zoned. PdPn was formed as the result of a superimposed process, which is not associated with either the sulfide liquid crystallization or the subsolidus transformations of sulfides. Deming regression calculations demonstrated the isomorphic substitution character of Ni by 0.71 Pd and 0.30 Fe (apfu), leading to PdPn occurrence. The replacement of Ni by Fe may also indicate a change in sulfur fugacity, compared to that taking place during the crystallization of the primary Pn. The transformation of Pn into PdPn could have occurred under the influence of a Pd-bearing fluid, which separated from the crystallizing body of the massive sulfide ores.Valery KaluginViktor GusevNadezhda TolstykhAndrey LavrenchukElena NigmatulinaMDPI AGarticleTalnakh depositmassive sulfide orePd-rich pentlanditefluidMineralogyQE351-399.2ENMinerals, Vol 11, Iss 1258, p 1258 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Talnakh deposit massive sulfide ore Pd-rich pentlandite fluid Mineralogy QE351-399.2
spellingShingle	Talnakh deposit massive sulfide ore Pd-rich pentlandite fluid Mineralogy QE351-399.2 Valery Kalugin Viktor Gusev Nadezhda Tolstykh Andrey Lavrenchuk Elena Nigmatulina Origin of the Pd-Rich Pentlandite in the Massive Sulfide Ores of the Talnakh Deposit, Norilsk Region, Russia
description	Pd-rich pentlandite (PdPn) along with ore-forming pentlandite (Pn) occurs in the cubanite and chalcopyrite massive sulfide ores in the EM-7 well of the Southern-2 ore body of the Talnakh deposit. PdPn forms groups of small grains and comprises marginal areas in large crystals of Pn. The palladium content in PdPn reaches up to 11.26 wt.%. EDS elemental mapping and a contour map of palladium concentrations indicate distinct variations in the palladium content within and between individual grains. Palladium distribution in the large grains is uneven and non-zoned. PdPn was formed as the result of a superimposed process, which is not associated with either the sulfide liquid crystallization or the subsolidus transformations of sulfides. Deming regression calculations demonstrated the isomorphic substitution character of Ni by 0.71 Pd and 0.30 Fe (apfu), leading to PdPn occurrence. The replacement of Ni by Fe may also indicate a change in sulfur fugacity, compared to that taking place during the crystallization of the primary Pn. The transformation of Pn into PdPn could have occurred under the influence of a Pd-bearing fluid, which separated from the crystallizing body of the massive sulfide ores.
format	article
author	Valery Kalugin Viktor Gusev Nadezhda Tolstykh Andrey Lavrenchuk Elena Nigmatulina
author_facet	Valery Kalugin Viktor Gusev Nadezhda Tolstykh Andrey Lavrenchuk Elena Nigmatulina
author_sort	Valery Kalugin
title	Origin of the Pd-Rich Pentlandite in the Massive Sulfide Ores of the Talnakh Deposit, Norilsk Region, Russia
title_short	Origin of the Pd-Rich Pentlandite in the Massive Sulfide Ores of the Talnakh Deposit, Norilsk Region, Russia
title_full	Origin of the Pd-Rich Pentlandite in the Massive Sulfide Ores of the Talnakh Deposit, Norilsk Region, Russia
title_fullStr	Origin of the Pd-Rich Pentlandite in the Massive Sulfide Ores of the Talnakh Deposit, Norilsk Region, Russia
title_full_unstemmed	Origin of the Pd-Rich Pentlandite in the Massive Sulfide Ores of the Talnakh Deposit, Norilsk Region, Russia
title_sort	origin of the pd-rich pentlandite in the massive sulfide ores of the talnakh deposit, norilsk region, russia
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/0b8996d97f3e4fcbb6c279f37e6b1179
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Origin of the Pd-Rich Pentlandite in the Massive Sulfide Ores of the Talnakh Deposit, Norilsk Region, Russia

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