Stratigraphic correlations between the Brabant Massif and the Stavelot, Rocroi and Givonne inliers (Belgium) and geological implications

IF 1.2 4区 地球科学 Q2 GEOLOGY
A. Herbosch
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引用次数: 1

Abstract

The Caledonian basement crops out in the middle and southern part of Belgium in two major tectonic units: the Brabant Massif in the Brabant Parautochthon and the Stavelot-Venn, Rocroi, Givonne and Serpont inliers in the Ardenne Allochthon. The main aim of this work is to achieve a chronostratigraphic correlation between the Brabant Massif and the Ardenne inliers, from the lower Cambrian to the Middle Ordovician. Throughout his career, Michel Vanguestaine established an informal acritarch biozonation for this basement, which is only linked to the international stratigraphic scale in vigour at that time. Our first step was to correlate these informal biozones with the trilobite (Cambrian) and graptolite (Ordovician) biozonations which are currently well correlated with the chronostratigraphy. Then, compilation of the literature concerning each of these sedimentary units makes it possible to assign a chronostratigraphic position to their constituent formations. This work has permitted the establishment of a complete chart of the stratigraphic correlations between the Brabant Massif and the three main Ardenne inliers (Stavelot-Venn, Rocroi and Givonne). Geological implications are discussed: the Brabant Massif and the Ardenne inliers formed a single sedimentation basin with different and rheologically contrasting basements (rift and shoulder). New arguments confirm the presence of a Caledonian orogeny in the Ardenne.
Brabant地块与比利时Stavelot、Rocroi和Givonne inliers的地层对比及其地质意义
加里东基底在比利时中南部发育为两个主要构造单元:布拉班特副陆块中的布拉班特地块和阿登原陆块中的斯塔韦洛特-维恩、罗克罗伊、吉冯内和塞尔庞特内列尔。本研究的主要目的是建立布拉班特地块与阿登内系下寒武统至中奥陶统的年代地层对比。在他的整个职业生涯中,Michel Vanguestaine为这个地下室建立了一个非正式的生物区隔,这在当时只与国际地层规模相联系。我们的第一步是将这些非正式生物带与三叶虫(寒武纪)和笔石(奥陶纪)生物带联系起来,这些生物带目前与年代地层学有很好的联系。然后,对有关这些沉积单元的文献进行汇编,就有可能为它们的组成地层指定一个年代地层位置。这项工作建立了布拉班特地块与阿登地区三条主要河流(斯塔韦洛特-维恩、罗克罗瓦和吉冯内)之间地层对比的完整图表。讨论了地质意义:布拉班特地块和阿登内河形成了一个单一的沉积盆地,具有不同的流变基底(裂谷和肩)。新的论据证实了在阿登地区存在加里东造山运动。
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来源期刊
Geologica Belgica
Geologica Belgica 地学-地质学
CiteScore
4.70
自引率
27.80%
发文量
8
审稿时长
>12 weeks
期刊介绍: Geologica Belgica is a Belgian journal that welcomes papers concerning all aspects of the earth sciences, with a particular emphasis on the regional geology of Belgium, North West Europe and central Africa. Papers not dedicated to the geology of Belgium, North West Europe and central Africa are only accepted when one of the authors is linked to a Belgian University or Institution. Thematic issues are highly appreciated. In this case, guest editors take in charge the selection of the manuscripts and the subject of the papers can be enlarged. The journal is in open access. Submitted manuscripts should be concise, presenting material not previously published. The journal also encourages the publication of papers from Belgian junior authors. Short letters are accepted. Papers written in English are preferred. Each mansucript will be reviewed by at least two reviewers.
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