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- Title
The first Lu-Hf zircon isotope data for gabbro-diorite-tonalite associations of the Urals.
- Authors
Ronkin, Yu.; Smirnov, V.; Ivanov, K.; Gerdes, A.
- 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 Hf/Hf( t) ratio in the studied zircon from gabbro and plagiogranite corresponds in fact to a highly LILE-depleted (DM) mantle.
- Subjects
URAL Mountains (Russia); RUSSIA; ZIRCON; DIORITE; IGNEOUS rocks; ISLAND arcs
- Publication
Doklady Earth Sciences, 2017, Vol 472, Issue 1, p104
- ISSN
1028-334X
- Publication type
Article
- DOI
10.1134/S1028334X17010251