Аннотация
Obtained data shows that high-potassic dyke rocks of the Ryabinoviy massif (Central Aldan) belong to low-titanium lamproite series (Mediterranean type) and are distinct with “classic” high-titanium lamproites. Based on Al-in-olivine thermometer, temperature of olivine–chrome-spinel pair crystallization varies in range between 1100 and 1250°C. This suggests lithospheric mantle source for the parental melt and makes role of mantle plume insignificant. High-precision data on olivine composition and bulk rock traceelement composition imply mixed source for the parental melt, consisted of depleted peridotite and enriched domains, originated during ancient subduction.
Язык оригинала | английский |
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Страницы (с-по) | 1008-1012 |
Число страниц | 5 |
Журнал | Doklady Earth Sciences |
Том | 481 |
Номер выпуска | 2 |
DOI | |
Состояние | Опубликовано - 1 авг 2018 |