Abstract
The new data for the segregations, paragenetic assemblage, and composition of bismuthian jamesonite from gold–quartz mineralization at the Sredny Golgotai deposit located in the eastern part of the Mongolia–Okhotsk orogenic belt are reported. This mineral occurs as two varieties (I, II), which are slightly different in composition and chemically close to bismuthian jamesonite (“sakharovaite”) described from the Ustarasai deposit. In contrast to variety II, variety I is Cu- and Fe-free. The electron microprobe study has revealed that varieties I and II are close to jamesonite and tintinaite, respectively. The data obtained make it possible to conclude that individual sulfosalt species of the proper tintinaite and jamesonite series, which are close in composition, are probable members of the tintinaite–kobellite series. It is assumed that the Cu- and Fe-free variety of bismuthian jamesonite close in composition to “sakharovaite” is an individual mineral species.
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ACKNOWLEDGMENTS
We thank V.E. Tupyakov, A.V. Tupyakov, and researchers of the Laboratory of Geochemistry of Ore Formation and Geochemical Methods of Prospecting at the Institute of Geochemistry, Siberian Branch Russian Academy of Sciences for their assistance in field works at the deposit, and G.B. Molchanova and N.I. Ekimova from Laboratory of X-ray methods in Analytical Center of Far East Geological Institute, Far East Branch, Russian Academy of Sciences for their assistance and analytical study.
Funding
This study has been partly supported by the Russian Foundation for Basic Researches (project nos. 15-05-00809, 16-05-00283, 16-35-60098) and Far East Branch, Russian Academy of Sciences (grant 15-I-2-003o).
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Vakh, A.S., Gvozdev, V.I., Goryachev, N.A. et al. Bismuthian Jamesonite (“Sakharovaite”) in Ores of the Sredny Golgotai Gold Deposit, Eastern Transbaikal Region, Russia. Geol. Ore Deposits 61, 791–802 (2019). https://doi.org/10.1134/S1075701519080129
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DOI: https://doi.org/10.1134/S1075701519080129