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

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作者：
D. S. Yudin
A. A. Tomilenko
T. A. Alifirova
A. V. Travin
N. G. Murzintsev
N. P. Pokhilenko
机构：
[1] Russian Academy of Sciences,Sobolev Institute of Geology and Mineralogy, Siberian Branch
[2] Novosibirsk State University,undefined
[3] National Tomsk State Research University,undefined
来源：
Doklady Earth Sciences | 2016年 / 469卷
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摘要：
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.
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页码：728 / 731
页数：3
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