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The effect of sodium on the solubilities of metals in silicate meltsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 6 декабря 2018 г.
- Авторы: Borisov A., Lahaye Y., Palme H.
- Журнал: American Mineralogist
- Том: 91
- Год издания: 2006
- Издательство: Mineralogical Society of America
- Местоположение издательства: United States
- Первая страница: 762
- Последняя страница: 771
- Аннотация: We have experimentally studied the effect of Na2O on the solubility of four metals: Fe, Co, Ni and Pd. Experiments were done with silicate melts of anorthite-diopside eutectic composition with variable Na2O concentrations and at fixed temperatures of 1300 °C for Pd and 1400 °C for Ni, Co and Fe. In the Fe solubility experiments Na losses were severe. Therefore, a new experimental device CSLT (crucible supported loop technique) was designed to prevent Na losses of experimental charges primarily for experiments at low oxygen fugacities. The CSLT was extensively tested and it was demonstrated that high Na partial pressures could be kept in a semi-closed crucible for at least 20 hours. In experiments on Co solubilities the CSLT was tested with reversed experiments. The Fe and Co solubilities clearly decrease with increasing Na2O-contents. The Ni solubility is independent of Na2O contents up to 4.5 wt%. At oxidizing conditions a small decrease in Ni-solubility with increasing sodium was found. Palladium shows a mixed behavior, decreasing solubility with increasing Na2O, up to about 4 wt%. At higher Na contents Pd solubility is independent of Na content. The increase of FeO activity coefficients with increasing sodium found in this study may provide an explanation for decreasing FeO with decreasing degrees of partial melting in experimentally produced mantle melts (Hirschmann et al. 1998), as melts at low melting degrees are sodium-rich.
- Добавил в систему: Борисов Александр Александрович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | AM91_PdNiCoFeNa-06.pdf | 732,3 КБ | 2 декабря 2018 [aborisov] |