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Tectonics and sedimentation during convergence of the ALCAPA and Tisza–Dacia continental blocks: The Pienide nappe emplacement and its foredeep (N. Romania)

By
M. Tischler
M. Tischler
Geologisch-Paläontologisches Institut, Universität Basel, Bernoullistr. 35, 4056 Basel, Switzerland (e-mail: matthias.tischler@gmail.com)Present address: Statoil ASA, Statoil Head Office, Forusbeen 50, 4035 Stavanger, Norway
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L. Matenco
L. Matenco
Netherlands Centre for Integrated Solid Earth Sciences, Vrije Universiteit, Faculty of Earth and Life Sciences, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
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S. Filipescu
S. Filipescu
Department of Geology, Babeş -Bolyai University, Str. Kogălniceanu 1, 400084 Cluj-Napoca, Romania
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H. R. Gröger
H. R. Gröger
Geologisch-Paläontologisches Institut, Universität Basel, Bernoullistr. 35, 4056 Basel, Switzerland (e-mail: matthias.tischler@gmail.com)Present address: Statoil ASA, Statoil Head Office, Forusbeen 50, 4035 Stavanger, Norway
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A. Wetzel
A. Wetzel
Geologisch-Paläontologisches Institut, Universität Basel, Bernoullistr. 35, 4056 Basel, Switzerland (e-mail: matthias.tischler@gmail.com)
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B. Fügenschuh
B. Fügenschuh
Geology and Paleontology, Innsbruck University, Innrain 52f, A-6020Innsbruck, Austria
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Published:
January 01, 2008

Abstract

The juxtaposition of the ALCAPA and Tisza–Dacia continental blocks, although one of the key issues in the evolution of the Carpathians, is not well known in terms of associated effects on the sedimentary systems during frontal foreland development. Most of the contact between ALCAPA and Tisza–Dacia being covered by post-tectonic deposits, these effects can best be observed in northern Romania. Sedimentological data on facies, palaeocurrents and modal composition of sandstones combined with micropalaeontological data and 2D well-calibrated seismic lines constrain the tectonic history of the contact zone between ALCAPA and Tisza–Dacia. Pervasive deposition of sand-dominated siliciclastics beginning in late Early Oligocene (Late Rupelian) times is interpreted to reflect the onset of convergence between ALCAPA and Tisza–Dacia in the study area. The depocentre of coarse siliciclastic material migrates southward, finally forming a southeastward-thinning clastic wedge in the Transylvanian Basin. This Burdigalian-age clastic wedge is interpreted as fill of a flexural foreland basin that formed in response to the coeval thrusting of parts of ALCAPA (Pienides) over Tisza–Dacia. A shift from an E–W to SE–NW striking basin axis during Oligocene times towards a WSW–ENE oriented basin axis during Burdigalian times is interpreted as a result of clockwise rotation of Tisza–Dacia during basin formation.

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Contents

Geological Society, London, Special Publications

Tectonic Aspects of the Alpine-Dinaride-Carpathian System

S. Siegesmund
S. Siegesmund
University of Göttingen, Germany
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B. Fügenschuh
B. Fügenschuh
University of Innsbruck, Austria
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N. Froitzheim
N. Froitzheim
University of Bonn, Germany
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Geological Society of London
Volume
298
ISBN electronic:
9781862395466
Publication date:
January 01, 2008

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