Mineral and S-Isotope Compositions of Cu-Sulfide Deposits in Southern Siberia (Kodar–Udokan Region), Russia
Abstract
:1. Introduction
2. Geological Background
2.1. Brief Geology of the Territories
2.2. Brief Geology of the Deposits
2.2.1. Deposits in the Carbonate-Terrigenous Rocks
2.2.2. Magmatic and Complex Deposits
3. Objects and Methods
4. Results
4.1. Deposits in Carbonate-Terrigenous Rocks
4.2. Deposits in Magmatic Rocks and Other Deposit Types
5. Discussion
5.1. Short Overview
5.2. Mineral Composition of Ores in the Kodar–Udokan Region
5.3. Sulfur Isotopes in the Ores of the Deposits from the Kodar–Udokan Region
5.4. Possible Scenario of the Deposit Formation in the Kodar–Udokan Region
6. Conclusions
- Significant variations in the mineral composition of the deposits located at the different levels of the sedimentary sequence of the Udokansky complex were established: from the Krasny deposit, characterized by a diverse composition of ores with minerals atypical of Cu sandstone-hosted deposits (pentlandite, pyrrhotite, and tennantite–tetrahedrite series) to the Udokan deposit, where a chalcocite–bornite association sharply dominates.
- The study of the sulfur isotope composition of sulfides from the deposits in the Kodar–Udokan region revealed a significant range of δ34S variations in each of them (up to 40‰). Analysis of the sulfur distribution in the studied deposits shows a tendency for δ34S reduction from positive values (the Krasny deposit) to strongly negative ones at the Udokan deposit located at the uppermost level of the stratigraphic sequence.
Supplementary Materials
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Deposit | Section | Ore Composition | Subordinate and Rare Minerals | Cu, wt.% | Ag, ppm | Co, ppm |
---|---|---|---|---|---|---|
Luktursky | Chalcopyrite–pyrrhotite–pentlandite | Millerite, etc. | 0.5 | 4.2 | 15 | |
Chineysky | Rudny | Pyrrhotite–chalcopyrite | Pentlandite Cobaltite Gersdorffite Sperrylite, Michenerite, etc. | 0.7 | 3.5 | 20 |
Kontaktovy | Pyrite Chalcopyrite | Pyrrhotite, Pentlandite, etc. | 0.6 | - | 18 | |
Udokan | Sekuchshy | Chalcopyrite Chalcocite Bornite Pyrite | Djurleite, Digenite Anilite, Covellite Acanthite, Native Ag, Cobaltite, Betekhtinite, etc. | 1.94 | 191 | 4 |
Shumny–Krutoy | Pyrite Chalcopyrite | Bornite | 1.08 | 80 | 30 | |
Unkur | Pyrite Chalcopyrite Bornite Chalcocite | Uraninite Stromeyerite Mercury Balkanite Naumannite Allanite Thorite | 0.8 | 22 | 600 | |
Burpala | Pyrite Chalcopyrite Bornite | Chalcocite Galena | 1.63 3.0 | 26 125 | 210 14 | |
Pravoingamakitsky | Skvoznoy | Pyrite Chalcopyrite | ||||
Basaltovy | Pyrite Chalcopyrite | Hessite, Clausthalite, Bravoite, Bogdanovichite | 5.0 | 4.2 | 24 | |
Pravoingamakitsky proper | Chalcocite Bornite | Chalcopyrite, Pyrite, etc. | 1.42 | 60 | 30 | |
Krasny | Pyrite Chalcopyrite–Pyrrhotite | Bornite, Arsenopyrite Tennantite Tetrahedrite, etc. | 1.15 | 37 | 72 |
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Gongalsky, B.; Velivetskaya, T.; Taskaev, V. Mineral and S-Isotope Compositions of Cu-Sulfide Deposits in Southern Siberia (Kodar–Udokan Region), Russia. Minerals 2024, 14, 228. https://doi.org/10.3390/min14030228
Gongalsky B, Velivetskaya T, Taskaev V. Mineral and S-Isotope Compositions of Cu-Sulfide Deposits in Southern Siberia (Kodar–Udokan Region), Russia. Minerals. 2024; 14(3):228. https://doi.org/10.3390/min14030228
Chicago/Turabian StyleGongalsky, Bronislav, Tatyana Velivetskaya, and Vladimir Taskaev. 2024. "Mineral and S-Isotope Compositions of Cu-Sulfide Deposits in Southern Siberia (Kodar–Udokan Region), Russia" Minerals 14, no. 3: 228. https://doi.org/10.3390/min14030228