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Sources of Paleozoic granitic rocks and isotopic heterogeneity of the continental crust of the Aktau-Dzhungar microcontinent, Central Kazakhstan.

Authors :
Degtyarev, K.
Shatagin, K.
Tret'yakov, A.
Source :
Doklady Earth Sciences. Oct2016, Vol. 470 Issue 2, p1010-1013. 4p.
Publication Year :
2016

Abstract

Several generations of Paleozoic granitic rocks are studied with Sm-Nd isotopic methods in the northwestern part of the Aktau-Dzhungar microcontinent of Central Kazakhstan (Atasu-Mointy divide). The initial Nd isotopic composition of the granitic rocks varies in a relatively narrow range from-0.1 to-3.5ε; the Nd model ages are also similar (1.11-1.46 Ga). These results indicate that the crustal source of all the Paleozoic granitic rocks of the region had similar composition and, probably, age. It is shown that the t (DM) values of the Paleozoic granites reflect different proportions between ancient and juvenile material in the crustal source. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
1028334X
Volume :
470
Issue :
2
Database :
Academic Search Index
Journal :
Doklady Earth Sciences
Publication Type :
Academic Journal
Accession number :
119231177
Full Text :
https://doi.org/10.1134/S1028334X16100111