Pseudomorphic Rhythmically Banded and Oscillatory Tetrahedrite–Tennantite Aggregates in the Darasun Gold Deposit (Eastern Transbaikalia, Russia): A Result of Coupled Dissolution–Reprecipitation Reactions
| Autor: | V. Yu. Prokofiev, N. G. Lyubimtseva, O. V. Vikent’eva, S. E. Borisovsky, N. S. Bortnikov |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Fluid composition
Tetrahedrite Geochemistry Gold deposit Bournonite engineering.material 010502 geochemistry & geophysics 01 natural sciences Galena Tennantite Earth and Planetary Sciences (miscellaneous) engineering General Earth and Planetary Sciences 010503 geology Chemical equilibrium Dissolution Geology 0105 earth and related environmental sciences |
| Zdroj: | Doklady Earth Sciences. 483:1431-1436 |
| ISSN: | 1531-8354 1028-334X |
| DOI: | 10.1134/s1028334x18110041 |
| Popis: | The rhythmically banded aggregates of Fe–tennantite with oscillatory zoning resulting from simultaneous variations in the concentrations of Sb and As and Zn and Fe were registered in the Darasun gold deposit (Eastern Transbaikalia). These aggregates were formed upon pseudomorphic replacement of early Zn–tetrahedrite. This process was initiated by the dissolution of Zn–tetrahedrite with the formation of an aggregate of galena, bournonite, and late tetrahedrite–tennantite. It is shown that rhythmically banded aggregates with an oscillatory zoning were formed as a result of coupled dissolution–reprecipitation reactions under the conditions that are far from the mineral–fluid chemical equilibrium and variations in the fluid composition controlled by kinetic factors. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |