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首页> 外文期刊>Geology, Geophysics & Environment >Salt tectonics in front of the Outer Carpathian thrust wedge in the Wieliczka area (S Poland) and its exposure in the underground salt mine
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Salt tectonics in front of the Outer Carpathian thrust wedge in the Wieliczka area (S Poland) and its exposure in the underground salt mine

机译：在Wieliczka地区的外喀尔巴阡山脉推力楔形前的盐构造楔子及其在地下盐矿的暴露

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摘要

Salt deposits in the Wieliczka area (Wieliczka Salt Deposit - WSD) in southern Poland comprise saltrich strata belonging to an evaporite succession that originated in the Carpathian Foredeep basin in the Middle Miocene Badenian (Serravallian) times, ca 13.81-13.45 Ma. Although they have been mined since the 13th century and decades of investigations provided abundant data on their origin and structure, some aspects of their geological evolution are still not fully understood. This study presents current concepts on the lithostratigraphy and tectonics of the WSD. The salt-bearing facies developed near to the southern basin margin, delineated by the Carpathian orogenic front. Such a location triggered the redeposition of sediments and gravity-driven deformation followed by tectonic deformation related to the forelandward advancement of the Carpathian thrusts. As a result, the WSD consists of folds and slices composed of two main salt members: (1) the stratified salt member, with intercalating salt, sulphates and siliciclastics, and (2) the boulder salt member, built of clays with large, isolated blocks of salt. The stratified member contains abundant meso-scale tectonic structures recording the soft-sediment deformation and deformation related to the northward tectonic push exerted by the advancing Carpathian thrust wedge. The boulder member originated due to the syntectonic erosion of evaporites along the basin margins and their redeposition during progressive northward migration of the Carpathian front. Recent interpretations of seismic data imply that the WSD constitutes the core of a triangle zone developed at the contact of the Carpathian orogenic wedge with the backthrust-displaced foredeep sedimentary fill. Meso-scale examples of sedimentary and tectonic structures in the salt-bearing succession exposed in the underground Wieliczka Salt Mine are described and their formation modes discussed.
机译：波兰南部的Wieliczka地区（Wieliczka盐矿床 - WSD）中的盐沉积包括属于蒸发岩山脉的Saltrich Strata，起源于中部喀尔巴阡山脉的帕登（Serravalian）时代，CA 13.81-13.45 ma。虽然自13世纪以来已经开采了几十年的调查，但在其起源和结构上提供了丰富的数据，但他们的地质演变的一些方面仍然没有完全理解。本研究提出了对WSD的岩石岩土和构造的当前概念。南部盆地边缘靠近南部盆地边缘的含盐面，由喀尔巴阡山脉的orenateform前面划清。这种位置引发了沉积物和重力驱动的变形的重新定位，然后是与喀尔巴阡山脉推力的前陆地推进相关的构造变形。结果，WSD由两个主要盐构件组成的褶皱和切片：（1）分层盐构件，具有插入盐，硫酸盐和硅化性，以及（2）巨石盐构件，由具有大，孤立的粘土构建盐块。分层构件包含丰富的中间尺度构造结构，记录与推进喀尔巴阡山脉推力楔施加的向北构造推动相关的软泥沙变形和变形。由于沿盆地边缘沿盆地边缘的蒸发晶体的映像侵蚀，巨石构件起源于爬行机前沿的逐步向北迁移期间的旋转沉积。最近对地震数据的解释意味着WSD构成了在喀尔巴阡山脉垂直楔形的接触时形成的三角形区域的核心，其具有深度流离失所的沉积填充。描述了地下Wieliczka盐矿暴露的沉积和构造结构中沉积和构造结构的中间规模示例，并讨论了它们的地层模式。

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