The Compositional Peculiarities of Microinclusions in Diamonds from the Lomonosov Deposit (Arkhangelsk Province)

G. Yu Kriulina, A. V. Iskrina, D. A. Zedgenizov, A. V. Bobrov, V. K. Garanin

Результат исследования: Научные публикации в периодических изданияхстатья

Аннотация

The data on the composition of microinclusions in diamonds from the Lomonosov deposits are reported for the first time. The studied diamonds include “coated” (n = 5) and cubic (n = 5) crystals. The estimated range of the degree of nitrogen aggregation in diamonds (4–39% B1) does not support their direct links with kimberlite magmatism; however, their short occurrence in the mantle at higher temperatures is probable as well. The composition of melt/fluid microinclusions in these samples varies from essentially carbonatitic to significantly silicate. It is shown that the contents of MgO, CaO, Na2O, Cl, and P2O5 decrease with increasing content of silicates and water. Different mechanisms of the generation and evolution of diamond-forming media are discussed to explain the observed variations.

Язык оригиналаанглийский
Страницы (с-по)973-980
Число страниц8
ЖурналGeochemistry International
Том57
Номер выпуска9
DOI
СостояниеОпубликовано - 1 сен 2019
Опубликовано для внешнего пользованияДа

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