Age boundaries of formation of the Tomtor alkaline-ultramafic pluton: U-Pb and 40Ar/39Ar geochronological studies

被引：0

作者：

N. V. Vladykin

A. B. Kotov

A. S. Borisenko

V. V. Yarmolyuk

N. P. Pokhilenko

E. B. Sal’nikova

A. V. Travin

S. Z. Yakovleva

机构：

[1] Russian Academy of Sciences,Vinogradov Institute of Geochemistry, Siberian Branch

[2] Russian Academy of Sciences,Institute of Precambrian Geology and Geochronology

[3] Russian Academy of Sciences,Sobolev Institute of Geology and Mineralogy, Siberian Branch

[4] Russian Academy of Sciences,Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry

来源：

Doklady Earth Sciences | 2014年 / 454卷

关键词：

206Pb; DOKLADY Earth Science; Nepheline; Siberian Platform; Zircon Crystal;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

This paper presents the results of geochronological studies of the Tomtor alkaline-ultramafic pluton, one of the largest Nb, Y, Sc, and TR deposits. A new scheme of its magmatism is given. The current K-Ar and Rb-Sr ages of different igneous rocks of the Tomtor pluton range from 800 to 250 Ma [Zaitsev et al., 1992; Frolov et al., 2003]. Such dispersion is probably related to the intense carbonatization of the rocks. The U-Pb zircon and 40Ar/39Ar mica ages indicate two stages of the formation of the pluton (700 and 400 Ma), which agrees well with the age of cycles of rift-related tectonogenesis of the Siberian platform.

引用

页码：7 / 11

页数：4

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