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Sources of Paleozoic granitic rocks and isotopic heterogeneity of the continental crust of the Aktau-Dzhungar microcontinent, Central Kazakhstan.
- 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]
- Subjects :
- *GRANITE
*PALEOZOIC paleogeography
*SEISMIC anisotropy
*FELSIC rocks
*CHARNOCKITE
Subjects
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