Alpine crustal shear zones and pre-Alpine basement terranes in the Romanian Carpathians and Apuseni Mountains

摘要: The Carpathian orocline formed by complex suturing of small continental fragments to the East European (and Moesian) plate. Remnants belong three pre-Alpine lithotectonic assemblages: a "greenstone-granite" association and two gneissic assem blages. During Alpine collision, pieces crust were repeatedly fragmented welded accommodate heterogeneous strain along irregular plate boundary. Shallow structural levels tectonic discontinuities in which locus most intense migrated over time are now exposed as wide retrograde greenschist grade belts. Repeated, mainly transpressive deformation resulted early ductile fabrics being overprinted local brittle shear strain. Igneous intrusion accompanied different phases activity. age shearing initiation is probably late Paleozoic, configuration zones their internal structures consistent with geometry arc.