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

Dinu Pana and Philippe Erdmer
Alpine crustal shear zones and pre-Alpine basement terranes in the Romanian Carpathians and Apuseni Mountains
Geology (Boulder) (September 1994) 22 (9): 807-810

Abstract

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


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 22
Serial Issue: 9
Title: Alpine crustal shear zones and pre-Alpine basement terranes in the Romanian Carpathians and Apuseni Mountains
Affiliation: University of Alberta, Department of Geology, Edmonton, AB, Canada
Pages: 807-810
Published: 199409
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 40
Accession Number: 1994-047804
Categories: Structural geologyIgneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: geol. sketch map
N46°00'00" - N49°49'60", E18°00'00" - E28°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 199422
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