Structural balancing at the southern border of the North East German basin: results and challenges

F. Jähne, J. Kley
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Abstract

Different types of salt-related structures and more or less strongly folded basement uplifts formed on the complex southern border of the North German Basin (NGB). The data resolution in this region offers excellent possibilities to study the relations of major basement thrusts with shortening in the sedimentary cover. Being still largely covered by Triassic and Jurassic sediments, the basement uplift in the south of the Lower Saxony basin (LSB) looks more subdued than its exposed eastern counterparts (Harz, Flechtingen High), but its size and vertical offset are apparently of the same order. In the Subhercynian basin and in the Northeast German Basin (NEGB) the Zechstein salt decouples the structures in the sedimentary cover from basement faults. In contrast, there is no clear evidence for regional detachments in the LSB. Cover deformation is more closely tied to underlying basement structures which are sometimes obscured by inversion (Kockel 2002). To test the hypothesis that the amount of shortening in parts of the NGB east and west of the Gifhorn fault array is roughly similar, we have investigated in detail the thin-skinned and thick-skinned deformation from the southern border of NEGB up to the complex inverted structures in the northern foreland of the Thuringian forest.
东北德意志盆地南部边界的结构平衡:结果与挑战
在北德意志盆地(NGB)复杂的南部边界上形成了不同类型的盐相关构造和或多或少强烈褶皱的基底隆升。该地区的资料分辨率为研究主要基底逆冲与沉积盖层缩短的关系提供了极好的可能性。下萨克森州盆地(LSB)南部的基底隆起大部分仍被三叠纪和侏罗纪沉积物覆盖,与东部暴露的同类盆地(Harz, Flechtingen High)相比,基底隆起看起来更为平缓,但其规模和垂直偏移量显然是相同的。在下海西期盆地和德国东北部盆地(NEGB),泽克斯坦盐使沉积盖层中的构造与基底断裂解耦。相比之下,没有明确的证据表明LSB有地区支队。盖层变形与下伏的基底构造关系更密切,而基底构造有时被反演掩盖(Kockel 2002)。为了验证Gifhorn断层阵列东西部部分NGB的缩短量大致相似的假设,我们详细研究了从NEGB南部边界到图林根森林北部前陆复杂倒转构造的薄皮变形和厚皮变形。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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