Sources of Paleozoic granitic rocks and isotopic heterogeneity of the continental crust of the Aktau–Dzhungar microcontinent, Central Kazakhstan
- Authors: Degtyarev K.E.1, Shatagin K.N.2, Tret’yakov A.A.2
-
Affiliations:
- Geological Institute
- Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
- Issue: Vol 470, No 2 (2016)
- Pages: 1010-1013
- Section: Geology
- URL: https://journals.rcsi.science/1028-334X/article/view/188969
- DOI: https://doi.org/10.1134/S1028334X16100111
- ID: 188969
Cite item
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 tNd(DM) values of the Paleozoic granites reflect different proportions between ancient and juvenile material in the crustal source.
About the authors
K. E. Degtyarev
Geological Institute
Author for correspondence.
Email: degtkir@mail.ru
Russian Federation, Pyzhevsky per. 35, Moscow, 119017
K. N. Shatagin
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
Email: degtkir@mail.ru
Russian Federation, Staromonetny per. 35, Moscow, 119017
A. A. Tret’yakov
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
Email: degtkir@mail.ru
Russian Federation, Staromonetny per. 35, Moscow, 119017