Types of Tellurium Mineralization of Gold Deposits of the Aldan Shield (Southern Yakutia, Russia)
| Autor: | Larisa A. Kondratieva, Galina S. Anisimova, Veronika N. Kardashevskaia |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Mineralization (geology)
0211 other engineering and technologies Geochemistry chemistry.chemical_element Calaverite 02 engineering and technology engineering.material 010502 geochemistry & geophysics 01 natural sciences Aldan Shield Au-Ag-Te and mixed Au-Ag-Bi-Te mineral types 021108 energy metasomatites Metasomatism Petzite 0105 earth and related environmental sciences tellurides Mineral alkaline magmatism Geology gold Geotechnical Engineering and Engineering Geology Mineralogy Sylvanite Krennerite chemistry Au-Bi-Te igneous activity engineering Tellurium QE351-399.2 |
| Zdroj: | Minerals Volume 11 Issue 7 Minerals, Vol 11, Iss 698, p 698 (2021) |
| ISSN: | 2075-163X |
| DOI: | 10.3390/min11070698 |
| Popis: | The published and original data on the tellurium mineralization of gold ore deposits of the Aldan Shield are systematized and generalized. The gold content is related to hydrothermal-metasomatic processes caused by Mesozoic igneous activity of the region. The formation of tellurides occurred at the very late stages of the generation of gold mineralization of all existing types of metasomatic formations. 29 tellurium minerals, including 16 tellurides, 5 sulfotellurides and 8 tellurates have been identified. Tellurium minerals of two systems predominate: Au-Bi-Te and Au-Ag-Te. Gold is not only in an invisible state in sulfides and in the form of native gold of different fineness, but also is part of a variety of compounds: montbrayite, calaverite, sylvanite, krennerite and petzite. In the gold deposits of the Aldan Shield, three mineral types are distinguished: Au-Ag-Te, Au-Bi-Te, and also a mixed one, which combines the mineralization of both systems. The decrease in the fineness of native gold is consistent with the sequence and temperatures of the formation of Te minerals and associated mineral paragenesis from the epithermal–mesothermal Au-Bi-Te to epithermal Au-Ag-Te. The conducted studies allowed us to determine a wide variety of mineral species and significantly expand the area of distribution of Au-Te mineralization that indicates its large-scale regional occurrence in the Aldan Shield. |
| Databáze: | OpenAIRE |
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