Coexisting Bournonite–Seligmannite and Tennantite–Tetrahedrite Solid Solutions of the Darasun Gold Deposit, Eastern Transbaikalia, Russia: Estimation of the Mineral Formation Temperature
| Autor: | N. G. Lyubimtseva, S. E. Borisovsky, N. S. Bortnikov |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Microprobe
Mineral Tetrahedrite Analytical chemistry Geology Bournonite engineering.material 010502 geochemistry & geophysics 01 natural sciences law.invention Geochemistry and Petrology law Tennantite engineering Economic Geology 010503 geology Crystallization Chemical composition 0105 earth and related environmental sciences Solid solution |
| Zdroj: | Geology of Ore Deposits. 61:274-291 |
| ISSN: | 1555-6476 1075-7015 |
| DOI: | 10.1134/s1075701519030061 |
| Popis: | Mineral assemblages, the peculiarities of intergrowths, chemical composition, and Sb and As distribution in coexisting fahlore and bournonite-seligmannite solid solutions of the Darasun gold deposit are studied. The almost complete solid solution between bournonite and seligmannite with continuous Sb–As isomorphism for Sb/(Sb + As) ratios from 0.21 to 1.00 is identified for the first time for the Darasun deposit using a microprobe. The composition of fahlore coexisting with bournonite widely varies: Sb/(Sb + As) ratio 0.03–0.96 and Fe/(Fe + Zn) ratio 0.36–0.87. The mutual compositional evolution from early Sb to late As coexisting solid solutions is identified. Based on the Sb and As distribution between coexisting fahlore and bournonite-seligmannite, the temperatures of their joint crystallization are estimated, as well as those of the productive stage, where they are associated with native gold and tellurides (90–335°C). |
| Databáze: | OpenAIRE |
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