GEODYNAMIC MODEL AND AR-39 AR-40 DATING FOR THE GENERATION AND EMPLACEMENT OF THE HIGH-PRESSURE (HP) METAMORPHIC ROCKS IN SW URALS/

Authors
MATTE P MALUSKI H CABY R NICOLAS A KEPEZHINSKAS P SOBOLEV S
Citation
P. Matte et al., GEODYNAMIC MODEL AND AR-39 AR-40 DATING FOR THE GENERATION AND EMPLACEMENT OF THE HIGH-PRESSURE (HP) METAMORPHIC ROCKS IN SW URALS/, Comptes rendus de l'Academie des sciences. Serie 2, Mecanique, physique, chimie, sciences de l'univers, sciences de la terre, 317(12), 1993, pp. 1667-1674
Citations number
18
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Comptes rendus de l'Academie des sciences. Serie 2, Mecanique, physique, chimie, sciences de l'univers, sciences de la terre → ACNP
ISSN journal
07644450
Volume
317
Issue
12
Year of publication
1993
Pages
1667 - 1674
Database
ISI
SICI code
0764-4450(1993)317:12<1667:GMAAAD>2.0.ZU;2-7
Abstract
The Urals are a long (3,000 x 200 to 400 km) Paleozoic belt separating Europe from Asia, characterized by a narrow strip of low temperature/ high pressure (LT/HP) metamorphic rocks outcropping along a major ocea nic suture, the Main Uralian Fault. We have dated the HP metamorphism in the southwestern Urals by Ar-39/Ar-40 On phengites at 380 Ma. We pr opose that it was generated during eastward subduction of the East Eur opean Paleozoic passive margin below the oceanic mantle during the Dev onian. The HP rocks were later exhumed (380 to 250 Ma) by the combinat ion of westward thrusting and eastward normal faulting on the Main Ura lian Fault.