Compressional strains may manifest along pre-existing structures within the lithosphere, far from the plate boundaries along which the causal stress is greatest. The style and magnitude of the related contraction is expressed in different ways, depending on the geometric and mechanical properties of the pre-existing structure. A three-dimensional approach is thus required to understand how compression may be partitioned and expressed along structures in space and time. We here examine how post-rift compressional strains are expressed along the northern margin of the Farsund Basin during Late Cretaceous inversion and Palaeogene–Neogene pulses of uplift. At the largest scale, stress localises along the lithosphere-scale Sorgenfrei-Tornquist Zone, where it is expressed in the upper crust as hangingwall folding, reverse reactivation of the basin-bounding normal fault, and bulk regional uplift. The geometry of the northern margin of the basin varies along strike, with a normal fault system passing eastward into an unfaulted ramp. Late Cretaceous compressive stresses, originating from the convergence between Africa, Iberia, and Europe, selectively reactivated geometrically simple, planar sections of the fault, producing hangingwall anticlines and causing long-wavelength folding of the basin fill. The amplitude of these anticlines decreases upwards due to tightening of pre-existing fault propagation folds at greater depths. In contrast, later Palaeogene–Neogene uplift is accommodated by long-wavelength folding and regional uplift of the entire basin. Subcrop mapping below a major, uplift-related unconformity and borehole-based compaction analysis show that uplift increases to the north and east, with the Sorgenfrei-Tornquist Zone representing a hinge line rather than a focal point to uplift, as was the case during earlier Late Cretaceous compression. We show how compressional stresses may be accommodated by different mechanisms within structurally complex settings. Furthermore, the prior history of a structure may also influence the mechanism and structural style of shortening that it experiences.

中文翻译：

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反演前的正断层几何形状控制反演的样式和幅度，挪威南部近海的Farsund盆地

压缩应变可能沿着岩石圈内的既有结构出现，远离因果应力最大的板块边界。相关收缩的样式和大小以不同的方式表示，具体取决于既有结构的几何和机械特性。因此，需要一种三维方法来理解如何可以沿空间和时间结构分割和表达压缩。我们在这里研究在晚白垩世反演和古近纪隆升的新近纪脉动过程中，沿法尔松盆地北缘如何表达裂谷后的压缩应变。在最大尺度上，应力沿岩石圈尺度的Sorgenfrei-Tornquist带分布，在上地壳中表现为悬壁折叠，盆地边界正断层的逆向活化，以及局部区域隆升。盆地北缘的几何形状沿走向变化，正常的断层系统向东进入未断裂的斜坡。源自非洲，伊比利亚和欧洲之间交汇的白垩纪晚期压应力选择性地重新激活了断层的几何简单平面部分，产生了上盘背斜，并引起盆地填充物的长波长折叠。这些背斜的振幅由于在更大深度上先前存在的断层传播褶皱的收紧而向上减小。相反，后来的古近纪隆隆被整个盆地的长波折叠和区域隆升所适应。主作物下方的子作物映射，与隆起有关的不整合面和基于钻孔的压实分析表明，隆起向北和向东增加，Sorgenfrei-Tornquist带代表铰链线，而不是隆起的焦点，就像早白垩世晚期受压的情况一样。我们展示了如何在结构复杂的环境中通过不同的机制来适应压应力。此外，结构的先验历史也可能影响其经历的缩短的机理和结构样式。