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Thermometric study of microinclusions in olivine of Uitkomst massive, Transvaalстатья
- Авторы: Solovova I., Yudovskaya M., Borisovskiy S., Zinovieva N.
- Журнал: Experiment in GeoSciences
- Том: 23
- Номер: 1
- Год издания: 2017
- Первая страница: 122
- Последняя страница: 124
- Аннотация: The inclusions in the cumulative olivine of ultramafic rocks of the satellite Uitkomst in the Bushveld complex were studied. It is established that the parent melt correspond to high-magnesian (MgO up to 18 wt%) andesibasalt with low water content and increased alkalinity. Its crystallization temperature is close to 1450°C. Coexisting inclusions of the second type have an acid composition and a homogenization temperature in the range of 1190-1250°C. It is shown that initially they were crystalline inclusions of albite. The composition of the melt varies depending on the degree of the alteration of albite, the size of the inclusions, and the temperature of homogenization. The increased concentration of alkali in the melts of primary inclusions and the change in the composition of the altered inclusions of albite is associated with the influence of hot Na-K-H2O fluid with dissolved petrogenic components during or after the crystallization of the liquidus olivine at the bottom of the magmatic chamber.
- Добавил в систему: Зиновьева Нина Георгиевна