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The Mid-Variscan Allochthon: Keys from correlation, partial retrodeformation and plate-tectonic reconstruction to unlock the geometry of a non-cylindrical belt
Earth-Science Reviews ( IF 10.8 ) Pub Date : 2021-06-02 , DOI: 10.1016/j.earscirev.2021.103700
José R. Martínez Catalán , Karel Schulmann , Jean-François Ghienne

The non-cylindrical character of the Variscan Belt is established via a description of its most salient geological characteristics and correlations among the main and relatively minor massifs from Bohemia to Morocco on the basis of a bibliographical synthesis. Using the firmly established tectonostratigraphic domains, the continuity of Variscan zones is discussed, as well as the western termination of the one that occupies most of the central part of the belt. This zone is characterized by its allochthony, and breaks the continuity of the zonation, that is, the cylindrism of the belt. A proposal is made to call this zone the Mid-Variscan Allochthon and its wedge shape in map view is explained performing a step by step restoration of late Variscan deformation. Once the geometry of the belt is interpreted by a succession of regionally significant deformation events, a kinematic reconstruction is proposed. It is based on recent developments on the knowledge of Paleozoic plate tectonics and intended to show that the deformation model is compatible with current paleogeographical developments.



中文翻译:

Mid-Variscan Allochthon:来自相关性、部分变形和板块构造重建的关键,以解开非圆柱形带的几何形状

Variscan 带的非圆柱形特征是通过在文献综合的基础上描述其最显着的地质特征以及从波西米亚到摩洛哥的主要和相对次要地块之间的相关性来确定的。使用牢固建立的构造地层域,讨论了瓦里斯坎带的连续性,以及占据带大部分中央部分的西端。该带的特点是异地性,打破了分带的连续性,即带的圆柱状。建议将这个区域称为中瓦里斯坎异质区,并解释其在地图视图中的楔形,执行晚期瓦里斯坎变形的逐步恢复。一旦带的几何形状被一系列区域性显着变形事件解释,运动学重建被提出。它基于古生代板块构造知识的最新发展,旨在表明变形模型与当前古地理发展相兼容。

更新日期:2021-07-09
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