Stratigraphic correlations between the Brabant Massif and the Stavelot, Rocroi and Givonne inliers (Belgium) and geological implications
| Autor: | Alain Herbosch |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Geologica Belgica. 24:137-157 |
| ISSN: | 2034-1954 1374-8505 |
| DOI: | 10.20341/gb.2021.004 |
| Popis: | 1. Introduction The last complete accounts of the comparative stratigraphy of the Belgian Caledonian basement, namely the Brabant Massif and the Ardenne inliers (Vanguestaine, 1992; Verniers et al., 2001, 2002) are becoming dated. Indeed, in the last 20 years, progress in the study of the Belgian Lower Paleozoic stratigraphy, but also of the global stratigraphy (Ogg et al., 2008; Gradstein et al., 2012, 2020) has greatly increased, which justifies the present work. The Caledonian basement crops out in the southern half of Belgium and neighbouring countries, where it is observed in two major tectonic units: the Brabant Parautochthon to the N and the Ardenne Allochthon to the S (Fig. 1). The latter belongs to the westernmost part of the Rheno-Hercynian domain and is close to the Variscan front. The Midi-Eifel-Aachen Thrust Fault displaced the Ardenne Allochthon several tens of km to the N, as shown by deep seismic investigations (see recent overview in Mancy & Lacquement, 2006; Meilliez & Lacquement, 2020). This northern shift is responsible for the formation of frequently overturned thrusts sheets which also incorporated Lower Paleozoic units as for example in the Condroz Inlier (e.g. Belanger et al., 2012). The Brabant Massif can be observed in the valleys that incise its southern rim but it is also present to the N under the Mesozoic and Cenozoic cover. In the Ardenne Allochthon the Caledonian basement is exposed in four inliers: Stavelot-Venn Inlier (SVI), Rocroi Inlier, Gi |
| Databáze: | OpenAIRE |
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