Abstract. A brief, regional-scale review of the Late Cretaceous – Early Palaeogene inversion-related tectonic structures affecting the Sudetes and their foreland at the NE margin of the Bohemian Massif is presented and complemented with results of new seismic studies. The Sudetes expose Variscan-deformed basement, partly overlain by post-orogenic Permo-Mesozoic cover, containing a wide spectrum of tectonic structures, both brittle and ductile, in the past in this area referred to as young Saxonian or Laramide. We have used newly reprocessed legacy seismics to study these structures at the two main post-Variscan structural units of the area, the North-Sudetic and Intra-Sudetic synclinoria, and discuss the results together with regionally-distributed examples coming from quarries and underground mines as well as those from the literature. The Late Cretaceous – Early Palaeogene tectonic structures in consecutively reviewed Sudetic tectonic units, from the north to south, typically include gentle to moderate buckle folds of detachment type or fault-related, high-angle reverse and normal faults, as well as low-angle thrusts – often rooted in the crystalline basement. The structures hitherto described as grabens, are frequently believed to be bounded by reverse faults (hence we use the term ‘reverse grabens’) and typically reveal strongly synclinal pattern of their sedimentary fill. The crystalline basement top, as imaged by seismic sections in the North Sudetic Synclinorium below the detachment-folded cover, is synformally down-warped with a wavelength of up to 30 km, whereas on the elevated areas, where the basement top is exposed at the surface, it is up-warped (i.e. tectonically buckled). The reviewed compressional structures typically show an orientation fitting the regionally-known Late Cretaceous – Early Palaeogene tectonic shortening direction of NE-SW to NNE-SSW The same applies to the regional joint pattern, typically comprising an orthogonal system of steep joints of c. NW-SE and NE-SW strikes. All the reviewed structures are considered as due to the Late Cretaceous – Early Palaeogene tectonic shortening episode, although some of the discussed faults with a strike-slip component of motion may have been modified, or even produced, by later, Late Cenozoic, tectonism.

中文翻译：

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晚白垩世 – 波西米亚地块东北缘（波兰西南部和捷克北部）与早古近纪反转相关的构造结构

摘要。对影响波西米亚地块东北边缘苏台德山脉及其前陆的晚白垩世-早古近纪反演相关的构造结构进行了简要的区域尺度回顾，并补充了新的地震研究结果。苏台德山脉暴露了瓦里斯坎变形的基底，部分被造山后的二中生代覆盖层覆盖，包含广泛的构造结构，包括脆性和韧性，过去在该地区被称为年轻的撒克逊或拉拉米德。我们使用新处理的遗留地震资料研究了该地区两个主要的后瓦里斯坎构造单元，即北苏德蒂克和苏德蒂克内向斜处的这些结构，并与来自采石场和地下矿山的区域分布示例一起讨论了结果以及文学作品中的那些。晚白垩世 – 早古近纪构造单元在连续回顾的苏德蒂构造单元中，从北到南，通常包括分离型或断层相关的平缓至中等扣褶皱褶，高角度反向和正断层，以及低角度推力——通常植根于水晶基底。迄今为止被描述为地堑的结构，通常被认为以逆断层为界（因此我们使用术语“逆地堑”），并且通常显示出其沉积充填的强烈向斜模式。结晶基底顶部，如分离折叠覆盖层下方的 North Sudetic Synclinorium 的地震剖面所成像，同形下翘，波长高达 30 公里，而在高架区域，基底顶部暴露在表面，它是向上翘曲的（即 构造弯曲）。审查的压缩结构通常显示出适合区域已知的晚白垩世 - 早古近纪构造缩短方向 NE-SW 到 NNE-SSW 的方向 这同样适用于区域节理模式，通常包括 c. 陡峭节理的正交系统。NW-SE 和 NE-SW 罢工。所有审查的结构都被认为是由于晚白垩世 - 早古近纪构造缩短事件，尽管一些讨论的具有走滑运动分量的断层可能已经被后期的晚新生代构造运动修改，甚至产生。通常包括 c 的陡峭接头的正交系统。NW-SE 和 NE-SW 罢工。所有审查的结构都被认为是由于晚白垩世 - 早古近纪构造缩短事件，尽管一些讨论的具有走滑运动分量的断层可能已经被后期的晚新生代构造运动修改，甚至产生。通常包括 c 的陡峭接头的正交系统。NW-SE 和 NE-SW 罢工。所有审查的结构都被认为是由于晚白垩世 - 早古近纪构造缩短事件，尽管一些讨论的具有走滑运动分量的断层可能已经被后期的晚新生代构造运动修改，甚至产生。