The first Lu–Hf zircon isotope data for gabbro–diorite–tonalite associations of the Urals
- Authors: Ronkin Y.L.1, Smirnov V.N.1, Ivanov K.S.1, Gerdes A.2
-
Affiliations:
- Zavaritskii Institute of Geology and Geochemistry, Ural Branch
- Institut für Geowissenschaftem Facheinheit Mineralogie, Petrologie, und Geochemie
- Issue: Vol 472, No 1 (2017)
- Pages: 104-108
- Section: Geochemistry
- URL: https://journals.rcsi.science/1028-334X/article/view/189418
- DOI: https://doi.org/10.1134/S1028334X17010251
- ID: 189418
Cite item
Abstract
The Lu–Hf isotope systematics of zircon from the gabbro–plagiogranite association (gabbro, diorite, tonalite, and plagiogranite), which is one of the most typical associations of igneous rocks in the Urals, was studied for the first time. The isotope study yielded a unified age limit of 433 Ma, which corresponds to the time of formation of this rock association. The younger “rejuvenated” ages characterize superimposed thermal impact events, induced by the volcanic arc activity, as well as collisional and postcollisional processes. Here, the initial 176Hf/177Hf(t) ratio in the studied zircon from gabbro and plagiogranite corresponds in fact to a highly LILE-depleted (DM) mantle.
About the authors
Yu. L. Ronkin
Zavaritskii Institute of Geology and Geochemistry, Ural Branch
Author for correspondence.
Email: y-ronkin@mail.ru
Russian Federation, Yekaterinburg, 620016
V. N. Smirnov
Zavaritskii Institute of Geology and Geochemistry, Ural Branch
Email: y-ronkin@mail.ru
Russian Federation, Yekaterinburg, 620016
K. S. Ivanov
Zavaritskii Institute of Geology and Geochemistry, Ural Branch
Email: y-ronkin@mail.ru
Russian Federation, Yekaterinburg, 620016
A. Gerdes
Institut für Geowissenschaftem Facheinheit Mineralogie, Petrologie, und Geochemie
Email: y-ronkin@mail.ru
Germany, Frankfurt am Main