Redéfinition des unités structurales du front varisque utilisées dans le cadre de la nouvelle Carte géologique de Wallonie (Belgique) ; Redefinition of the structural units of the Variscan Front used in the context of the new geological map of Wallonia (Belgium)

peer reviewed ; The new geological map of Wallonia permits to obtain a more global view of the tectonic organization of the Palaeozoic terrains around the Variscan Front in southern Belgium. This zone oriented WSW-ENE and passing south of an axis Charleroi-Namur, was firstly highlighted by the coal mining works, but has been significantly documented notably through deep boreholes and seismic profiles. A coherent structural sketch of the Variscan Front is proposed for its entire longitudinal course, where the following structural units are distinguished, from north to south: the Brabant Massif... Mehr ...

Verfasser: Belanger, Isabelle
Delaby, Serge
Delcambre, Bernard
Ghysel, Pierre
Hennebert, Michel
Laloux, Martin
Marion, Jean-Marc
Mottequin, Bernard
Pingot, Jean-Louis
Dokumenttyp: journal article
Erscheinungsdatum: 2012
Verlag/Hrsg.: Geologica Belgica
Schlagwörter: Ardenne Allochthon / Brabant Parautochthon / Midi Fault / Variscan Front / Front varisque / Allochtone ardennais / Parautochtone brabançon / Faille du Midi / Physical / chemical / mathematical & earth Sciences / Earth sciences & physical geography / Physique / chimie / mathématiques & sciences de la terre / Sciences de la terre & géographie physique
Sprache: Französisch
Permalink: https://search.fid-benelux.de/Record/base-26591654
Datenquelle: BASE; Originalkatalog
Powered By: BASE
Link(s) : https://orbi.uliege.be/handle/2268/117769

peer reviewed ; The new geological map of Wallonia permits to obtain a more global view of the tectonic organization of the Palaeozoic terrains around the Variscan Front in southern Belgium. This zone oriented WSW-ENE and passing south of an axis Charleroi-Namur, was firstly highlighted by the coal mining works, but has been significantly documented notably through deep boreholes and seismic profiles. A coherent structural sketch of the Variscan Front is proposed for its entire longitudinal course, where the following structural units are distinguished, from north to south: the Brabant Massif and the base of the cover unaffected by the Variscan orogeny, the Brabant Parautochthon, the Haine-Sambre-Meuse Overturned Thrust sheets (HSM-OTS) and the Ardenne Allochthon. Undeformed terrains during Variscan event constitute the northern border of the Variscan Front. The Brabant Parautochthon includes Devono-Carboniferous terrains, which are folded and faulted. The HSM-OTS are formed by the superposition of several sheets (e.g. La Tombe sheet), which are supported by various thrust faults (e.g. Masse fault). The Ardenne Allochthon, which has been displaced during the Variscan orogeny, rests on the Brabant Parautochthon and the HSM-OTS through a faulted zone, which is locally known as the Midi Fault. ; Les nouvelles cartes géologiques de Wallonie permettent d’obtenir une vision plus globale de l’organisation des terrains paléozoïques de la zone frontale varisque dans le Sud de la Belgique. Cette bande de terrain d’orientation WSW-ENE, passant au sud d’un axe Charleroi-Namur a été reconnue à l’origine grâce aux travaux miniers, mais a été considérablement documentée par des sondages profonds et des profils sismiques. Un schéma structural cohérent du front varisque est proposé où les unités structurales suivantes sont distinguées, du nord au sud : le Massif du Brabant et la base de sa couverture non affectés par l’orogenèse varisque, le Parautochtone brabançon, les Ecailles et les massifs renversés de Haine-Sambre-Meuse ...