U-Pb dating of the Verkniy Ufaley intrusion, middle Urals, Russia: a minimum age for subduction and amphibolite facies overprint of the East Europeancontinental margin

Citation
R. Hetzel et Rl. Romer, U-Pb dating of the Verkniy Ufaley intrusion, middle Urals, Russia: a minimum age for subduction and amphibolite facies overprint of the East Europeancontinental margin, GEOL MAG, 136(5), 1999, pp. 593-597
Citations number
28
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Earth Sciences
Journal title
GEOLOGICAL MAGAZINE
ISSN journal
0016-7568 → ACNP
Volume
136
Issue
5
Year of publication
1999
Pages
593 - 597
Database
ISI
SICI code
0016-7568(199909)136:5<593:UDOTVU>2.0.ZU;2-#
Abstract
The Palaeozoic Uralian orogen formed by accretion of island arcs and microc ontinents along the eastern margin of the East European platform. In the mi ddle Urals, a promontory of the East European platform, the Ufaley Complex experienced eclogite facies conditions followed by an amphibolite facies ov erprint. The Verkniy Ufaley intrusion crosscuts the amphibolite facies foli ation in the East Ufaley Complex and thus postdates the two metamorphic eve nts. A concordant U-Pb age of 316 +/- 1 Ma obtained on magmatic titanite da tes the intrusion of the pluton and provides a minimum age for subduction a nd subsequent amphibolite facies metamorphism of the East European continen tal margin. Zircon yields discordant age data that reflect the involvement of Proterozoic crustal sources.