Sulfides from Zhelos and Tokty-Oi Intrusions (East Sayan, Russia)

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Marco E. Ciriotti
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Sulfides from Zhelos and Tokty-Oi Intrusions (East Sayan, Russia)

Messaggio da Marco E. Ciriotti » mer 07 ago, 2019 21:05

Referenza:
▪ Kolotilina, T.B., Mekhonoshin, A.S., Orsoev, D.A. (2019): Sulfides from Zhelos and Tokty-Oi Intrusions (East Sayan, Russia). Minerals, 9, 479; https://doi.org/10.3390/min9080479

Abstract:
Re sulfides were discovered in Cu–Ni–platinum-group elements (PGE) ores of the Zhelos and Tokty-Oi intrusions. These intrusions can be considered as products of the mantle superplume responsible for Rodinia’s break-up. The mineral compositions were determined in situ in polished samples. Electron microprobe analyses were mostly consistent with a general formula of (Cu,Fe,Mo,Os,Re)5S8, (Cu,Fe,Mo,Os,Re)4S7, and (Cu,Fe,Mo,Re)S2. One of the major features of Re sulfide from the Zhelos intrusion is its high osmium content. The ΣMe/S ratio for a part of our data is consistent with that of the tarkianite. Re sulfides from the Tokty-Oi have a ΣMe/S ratio similar to those in rheniite or dzeskazganite, but differ from them by the presence of Fe and Cu and the metal-to-metal ratio. The localization of the Re sulfide within the chalcopyrite suggests its crystallization from the residual Cu-rich liquid.
Marco E. Ciriotti

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