Brittle structures identified within the largest karstic cave of the Sudetes (the Niedźwiedzia Cave) were studied to reconstruct the paleostress driving post-Variscan tectonic activity in the NE Bohemian Massif. Individual fault population datasets, including local strike and dip of fault planes, striations, and Riedel shear, enabled us to discuss the orientation of the principal stresses tensor. The (meso) fault-slip data analysis performed both with Dihedra and an inverse method revealed two possible main opposing compressional regimes: (1) NE–SW compression with the formation of strike-slip (transpressional) faults and (2) WNW–ESE horizontal compression related to fault-block tectonics. The (older) NE-SW compression was most probably associated with the Late Cretaceous–Paleogene pan-regional basin inversion throughout Central Europe, as a reaction to ongoing African-Iberian-European convergence. Second WNW–ESE compression was active as of the Middle Miocene, at the latest, and might represent the Neogene–Quaternary tectonic regime of the NE Bohemian Massif. Exposed fault plane surfaces in a dissolution-collapse marble cave system provided insights into the Meso-Cenozoic tectonic history of the Earth’s uppermost crust in Central Europe, and were also identified as important guiding structures controlling the origin of the Niedźwiedzia Cave and the evolution of subsequent karstic conduits during the Late Cenozoic.

研究了在Sudetes最大的岩溶洞穴（Niedźwiedzia洞穴）中发现的脆性结构，以重建东北波西米亚地块瓦里斯卡纳构造后的古应力驱动型构造活动。各个断层人口数据集，包括断层平面的局部走向和倾角，条纹和Riedel剪切力，使我们能够讨论主应力张量的方向。用Dihedra和反演方法进行的（中观）断层滑动数据分析揭示了两种可能的主要相对压缩方式：（1）NE-SW压缩，形成走滑（压性）断层；（2）WNW-ESE与断块构造有关的水平压缩。（较旧的）NE-SW压缩很可能与整个中欧晚白垩世-古近纪泛区域盆地倒转有关，作为对持续的非洲-伊比利亚-欧洲融合的反应。直到中新世以来，第二次WNW–ESE压缩作用一直很活跃，可能代表了NE波西米亚地块的新近纪—第四纪构造体制。溶蚀塌陷的大理石洞穴系统中暴露的断层平面表面提供了对中欧地球最上层地壳的中新生代构造历史的见识，也被认为是控制Niededwiedzia洞穴的起源和后续演化的重要指导结构。新生代晚期的岩溶导管。