Style and evolution of salt pillows and related structures in the northern part of the Northeast German Basin
Style and evolution of salt pillows and related structures in the northern part of the Northeast German Basin
复制标题
德国东北盆地北部盐枕及相关构造的样式和演化
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
J. Negendank
中科院分区：
文献类型：
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作者：
D. Kossow;C. Krawczyk;T. Mccann;M. Strecker;J. Negendank
抽象的。德国东北盆地的北方部分含有大量的晚二叠世（Zechstein）盐枕，而底辟构造几乎完全不存在。这种底辟构造的缺乏促进了盆地盐运动早期阶段的研究。在区域地质背景下，对盐枕和相关构造的分布、几何形状和盐流起始时间进行了研究。重建了研究区的原始Zechstein厚度，以更深入地了解盐层几何形状与盐相关构造样式之间的关系。在这项研究中，盐构造和基底断裂之间没有明确的空间关系，盐构造在这个地区的位置似乎是高度独立的下伏构造颗粒。覆盖层受小断层影响。我们认为，由于区域挤压的上覆岩层的屈曲显着贡献了晚侏罗世至早白垩世盐构造在盆地中的启动。Gardelegen和Haldensleben断层的逆断层与反转构造有关，并对盆地填充物施加了挤压。在变形过程中，晚二叠世盐层作为一个有效的拆离，并导致了显着的脱耦中生代覆盖层从下面的前Zechstein岩石。
Abstract. The northern part of the Northeast German Basin contains a large number of Late Permian (Zechstein) salt pillows, whereas diapiric structures are almost completely absent. This lack of diapirs facilitated the study of early stages of salt movement in the basin. Salt pillows and related structures were investigated in terms of distribution, geometry and time of initiation of salt flow within the regional geological context. The primary Zechstein thickness in the study area was reconstructed to gain more insight into the relationship between the geometry of the salt layer and the style of the salt-related structures. In this study, no clear spatial relationship between the salt structures and basement faults has been found and the location of the salt structures in this area appears to be highly independent of the underlying structural grain. The overburden is affected by minor faulting. We propose that buckling of the overburden due to regional compression significantly contributed to the initiation of the Late Jurassic to Early Cretaceous salt structures in the basin. Reverse faulting of the Gardelegen and Haldensleben Faults is related to inversion tectonics and exerted a compression on the basin fill. During the deformation, the Late Permian salt layer acted as an efficient detachment and led to a marked decoupling of the Mesozoic overburden from the underlying pre-Zechstein rocks.