Tectonic history of the Hercynian Armorican Shear belt (Brittany, France)

The Hercynian Armorican belt is made of different tectonic domains separated by large-scale shear zones. One of these domains, Central Brittany, was deformed by regional pervasive dextral strike-slip during Carboniferous times. This paper examines implications that the restoration of ductile strain...

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Bibliographic Details
Published inGeodinamica acta Vol. 17; no. 4; pp. 289 - 307
Main Authors Gumiaux, C., Gapais, D., Brun, J.P., Chantraine, J., Ruffet, G.
Format Journal Article
LanguageEnglish
Published Cachan Taylor & Francis Group 01.08.2004
Lavoisier
Taylor & Francis
Subjects
Armorican Massif
Deformation restoration
Earth Sciences
Earth, ocean, space
Exact sciences and technology
Fault reactivation
France
Hercynian belt
Regional scale strike slip
Sciences of the Universe
Tectonics. Structural geology. Plate tectonics
France
Armorican Massif
Western Europe
Hercynian Orogeny
shear zones
Europe
Fault reactivation
Hercynian belt
Deformation restoration
France
Armorican Massif
Regional scale strike slip
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Summary:The Hercynian Armorican belt is made of different tectonic domains separated by large-scale shear zones. One of these domains, Central Brittany, was deformed by regional pervasive dextral strike-slip during Carboniferous times. This paper examines implications that the restoration of ductile strain within Central Brittany has on the deformation history along its boundaries and within adjacent domains. Data used for the analysis include surface structural features and recent deep seismic data. A good consistency is observed between model implications and available geological and structural data. Results lead to a reappraisal of the Carboniferous history of the Armorican belt, including relationships between tectonics, plutonism and basin development. They further emphasize the usefulness of restoration for integrated tectonic analysis of crustal-scale deformation zones.
ISSN:0985-3111
1778-3593
DOI:10.3166/ga.17.289-307