Skip to Main Content
Skip Nav Destination
GEOREF RECORD

Visean sinistral wrench faulting along the Sillon Houiller in the French Massif Central; late Variscan tectonic implications

Vincent Thiery, Patrick Rolin, Didier Marquer, Alain Cocherie, C. Mark Fanning and Philippe Rossi
Visean sinistral wrench faulting along the Sillon Houiller in the French Massif Central; late Variscan tectonic implications (in Mechanics of the Variscan Orogeny; a modern view on orogenic research; Part 2, Michel Faure (editor), Patrick Ledru (editor) and Voytech Janoucek (editor))
Bulletin de la Societe Geologique de France (October 2009) 180 (6): 513-528

Abstract

The Sillon Houiller is one of the main crustal discontinuities of the Variscan domain of the French Massif Central. Paradoxically, its kinematics and its tectonic significance are still a matter of debate. Since Grolier and Letourneur's [1968] works, a Stephanian sinistral offset, inferred from the emplacement of numerous coal basins along the fault, is widely accepted. The earlier history of this accident is still debated and subject to controversies. The finite offset of the Sillon Houiller results from the superposition of 3 distinct events. The first one is a brittle/ductile accident that is probably at the origin of the main left-lateral motion. Dated granitoid intrusions and Visean tuff basins seal this accident. The later Stephanian motion is revealed by brittle faulting related to coal basin opening. Finally, a vertical offset of the fault is suggested by a few strong-dipping striations. The Visean offset of the Sillon Houiller has first order implications for the understanding of the western Europe Variscan orogeny. We suggest that the Sillon Houiller and the Paris Basin Magnetic anomaly belong to a single crustal discontinuity interpreted as the eastern boundary of the Armorican/Massif Central block. The 15 degrees clockwise rotation affecting this crustal block and inferred from the structural study of this domain occurred along this accident. The magnetic and gravimetric anomaly may be the result of Visean mafic intrusions, such as quartz diorites that are exposed in the northern part of the Massif Central close to the southern end of the anomaly.


ISSN: 0037-9409
EISSN: 1777-5817
Coden: BSGFAE
Serial Title: Bulletin de la Societe Geologique de France
Serial Volume: 180
Serial Issue: 6
Title: Visean sinistral wrench faulting along the Sillon Houiller in the French Massif Central; late Variscan tectonic implications
Title: Mechanics of the Variscan Orogeny; a modern view on orogenic research; Part 2
Author(s): Thiery, VincentRolin, PatrickMarquer, DidierCocherie, AlainFanning, C. MarkRossi, Philippe
Author(s): Faure, Micheleditor
Author(s): Ledru, Patrickeditor
Author(s): Janoucek, Voytecheditor
Affiliation: Universite de Franche-Comte, Besancon, France
Pages: 513-528
Published: 200910
Text Language: English
Summary Language: French
Publisher: Societe Geologique de France, Paris, France
Meeting name: Special meeting of the French and Czech Geological Societies
Meeting location: Orleans, FRA, France
Meeting date: 20070913Sept. 13-15, 2007
References: 86
Accession Number: 2010-010532
Categories: Structural geology
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, geol. sketch maps
N44°00'00" - N47°00'00", E00°45'00" - E05°00'00"
N48°00'00" - N50°00'00", E01°00'00" - E05°00'00"
Secondary Affiliation: Bureau de Recherche Geologiques et Minieres, FRA, FranceAustralian National University, AUS, Australia
Country of Publication: France
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Societe Geologique de France. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201007
Close Modal

or Create an Account

Close Modal
Close Modal