Sr and Nd isotope composition of deformed peridotite xenoliths from Udachnaya kimberlite pipe

E. A. Surgutanova, A. M. Agashev, E. I. Demonterova, A. V. Golovin, N. P. Pokhilenko

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

2 Цитирования (Scopus)

Аннотация

New results of Rb–Sr and Sm–Nd isotope analyses have been obtained on samples of deformed peridotite xenoliths collected from the Udachnaya kimberlite pipe (Yakutia). The data obtained imply two main stages of metasomatic alteration of the lithospheric mantle base matter in the central part of the Siberian Craton. Elevated ratios of Sr isotopes may be considered as evidence of an ancient stage of metasomatic enrichment by a carbonatite melt. The acquired Nd isotope composition together with the geochemistry of the deformed peridotite xenoliths suggests that the second stage of metasomatic alteration took place shortly before formation of the kimberlite melt. The metasomatic agent of this stage had a silicate character and arrived from an asthenosphere source, common for the normal OIB type (PREMA) and the Group-I kimberlite.

Язык оригиналаанглийский
Страницы (с-по)1204-1207
Число страниц4
ЖурналDoklady Earth Sciences
Том471
Номер выпуска1
DOI
СостояниеОпубликовано - 1 ноя 2016
Опубликовано для внешнего пользованияДа

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