Results of ^sup 40^Ar/^sup 39^Ar dating of phlogopites from kelyphitic rims around garnet grains (Udachnaya-Vostochnaya kimberlite pipe)

40Ar/39Ar dating of phlogopite from kelyphitic rims around garnet grains from the Udachnaya-Vostochnaya kimberlite pipe in the Sakha (Yakutia) Republic (Russia) revealed that when this mineral has contact with a kimberlite melt its age corresponds (within error limits) to that of the formation of th...

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Bibliographic Details
Published in:Doklady earth sciences 2016-07, Vol.469 (1), p.728
Main Authors: Yudin, D S, Tomilenko, A A, Alifirova, T A, Travin, A V, Murzintsev, N G, Pokhilenko, N P
Format: Article
Language:English
Subjects:
Geochemistry
Grain size
Magma
Minerals
Rocks
Online Access:Get full text
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Summary:40Ar/39Ar dating of phlogopite from kelyphitic rims around garnet grains from the Udachnaya-Vostochnaya kimberlite pipe in the Sakha (Yakutia) Republic (Russia) revealed that when this mineral has contact with a kimberlite melt its age corresponds (within error limits) to that of the formation of the kimberlite pipe, thus indicating that the method may be used for dating kimberlites and related rocks. In mantle xenoliths, kelyphitic phlogopites rimming garnet grains partially lose radiogenic Ar, which results in a complex age spectrum. Rejuvenation of the K/Ar system in them is determined by the thermal impact of the kimberlite melt on captured rocks.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X16070175