| Reference Type | Journal (article/letter/editorial) |
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| Title | Precious-Metal Mineralization and Formation Conditions of the Biche-Kadyr-Oos Epithermal Au-Ag Ore Occurrence (Eastern Sayan, Russia) |
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| Journal | Minerals |
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| Authors | Kuzhuget, Renat V. | Author |
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| Ankusheva, Natalia N. | Author |
| Hertek, Ailai K. | Author |
| Kalinin, Yuri A. | Author |
| Damdinov, Bulat B. | Author |
| Pirajno, Franco | Author |
| Butanaev, Yuri V. | Author |
| Suge-Maadyr, Nadezhda V. | Author |
| Soldup, Sholban N. | Author |
| Year | 2023 | Volume | < 13 > |
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| Issue | < 12 > |
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| URL | |
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| DOI | doi:10.3390/min13121529Search in ResearchGate |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 16991500 | Long-form Identifier | mindat:1:5:16991500:3 |
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| GUID | 4106be6e-7a80-4212-b1ca-c2cdeea75cb1 |
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| Full Reference | Kuzhuget, Renat V., Ankusheva, Natalia N., Hertek, Ailai K., Kalinin, Yuri A., Damdinov, Bulat B., Pirajno, Franco, Butanaev, Yuri V., Suge-Maadyr, Nadezhda V., Soldup, Sholban N. (2023) Precious-Metal Mineralization and Formation Conditions of the Biche-Kadyr-Oos Epithermal Au-Ag Ore Occurrence (Eastern Sayan, Russia) Minerals, 13 (12) doi:10.3390/min13121529 |
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| Plain Text | Kuzhuget, Renat V., Ankusheva, Natalia N., Hertek, Ailai K., Kalinin, Yuri A., Damdinov, Bulat B., Pirajno, Franco, Butanaev, Yuri V., Suge-Maadyr, Nadezhda V., Soldup, Sholban N. (2023) Precious-Metal Mineralization and Formation Conditions of the Biche-Kadyr-Oos Epithermal Au-Ag Ore Occurrence (Eastern Sayan, Russia) Minerals, 13 (12) doi:10.3390/min13121529 |
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| In | Link this record to the correct parent record (if possible) |
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| Abstract/Notes | The Biche-Kadyr-Oos epithermal Au-Ag ore occurrence is a prospective object in the Ak-Sug porphyry copper ore cluster (Eastern Sayan) in the northern part of the Central Asian orogenic belt (CAOB). The mineralization consists of gold-sulfide-quartz and gold-polysulfide-carbonate-quartz veins with argillic zones in the Lower Cambrian volcanic-sedimentary rocks. The origin of the Au-Ag ore occurrence is still debatable. To determine the origin, we examined the mineralogical and geochemical features, conditions of formation, and fluid sources of the Biche-Kadyr-Oos ore. A mineralogical and geochemical investigation outlines three stages of mineral formation: early argillic stage; gold-sulfide-quartz stage with pyrite, marcasite, pyrrhotite, arsenopyrite, chalcopyrite, less frequently sphalerite, hessite, gold, and electrum; and late gold-polysulfide-carbonate-quartz stage with gold, electrum, Hg-electrum, Se-acanthite, Se-galena, bornite, tennantite, tetrahedrite, hessite, tellurobismuthite, bismuthinite, matildite, jamesonite, ourayite, native Bi, and barite. Fluid inclusion study (thermometry, Raman spectroscopy) in quartz and mineral thermometry (electrum and sphalerite paragenesis) determined that ore veins were formed at P 0.5 kbar from CO2-water Na-K-chloride fluid (4.9–9.6 wt % NaCl eqv) and temperatures from 300 to 200 °C (early gold-sulfide-quartz veins at 300–230 °C, and late gold-polysulfide-carbonate-quartz veins at 290–200 °C) and variations in fO2, fS2, fSe2 and fTe2. The S isotopic composition in sulfides and δ34SH2S values of the fluid are +1.3‰ and +4.7‰, respectively, (T = 300–275 °C) indicating magmatic S in ore formation. The oxygen isotope data indicate that during the formation of veins, the magmatic fluid mixed with meteoric water (δ18Ofluid is from +3.4 to +6.4‰). The isotopic data that were obtained combined with mineralogical and geochemical features and conditions of ore formation indicate the similarity of Biche-Kadyr-Oos ore occurrence with epithermal Au-Ag deposits of intermediate sulfidation (IS) type. The presence of epithermal Au-Ag mineralization of the Biche-Kadyr-Oos IS type in ore cluster of the Ak-Sug Cu-Au-Mo porphyry deposit indicates the existence of a single porphyry-epithermal ore-magmatic system. |
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