This study examines subsurface deformation at the northern end of the Wadi Araba Fault (WAF), focusing on the Amman-Hallabat Fault (AHF) and the Wadi Shueib Fault (WSF). While surface evidence shows their tectonic impact from the Late Cretaceous to the present, research on their subsurface structures, contributing to the WAF, is limited. Using seismic data and well report, five seismo-stratigraphic units with significant unconformities were identified. The seismo-structural interpretation reveals a complex deformational fault zone with numerous reverse and normal faults intersecting strata from post-Precambrian rocks to the uppermost Cretaceous deposits, forming a composite flower structure with positive and negative flower characteristics. These structures show significant folding and thrusting of deposits from the uppermost Cretaceous to recent times. Seismic evidence indicates that the AHF and WSF extend upward to the Earth's surface. Fault mechanism analysis suggests a NE-SW transpressional deformation pattern, with fault formation and associated structures influenced by the Syrian Arc stress field since the Turonian. Changes in stress field orientation have significantly affected their reactivation. At its northern termination, the WAF may intersect or terminate against pre-existing faults like the AHF and WSF, influencing the WAF's behavior by accommodating strain, dissipating energy, or being reactivated as restraining bends due to the NNW-SSE-trending Dead Sea stress, leading to a complex network of distributed movement.

中文翻译：

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抑制瓦迪阿拉巴断层北端的弯曲变形：反射地震数据和震源机制解决方案的见解


本研究研究了阿拉巴干河断层 (WAF) 北端的地下变形，重点关注安曼-哈拉巴特断层 (AHF) 和舒伊布干河断层 (WSF)。虽然地表证据显示了它们从白垩纪晚期至今的构造影响，但对 WAF 的地下结构的研究却很有限。利用地震数据和井报告，确定了五个具有显着不整合面的地震地层单元。地震构造解释揭示了一个复杂的变形断裂带，有大量逆断层和正断层相交，从后前寒武纪岩石到白垩系最上部沉积层，形成具有正花和负花特征的复合花结构。这些结构显示了从白垩纪最上部到近代沉积物的显着褶皱和逆冲。地震证据表明 AHF 和 WSF 向上延伸到地球表面。断层机制分析表明，断层形成和相关构造呈北东-西向压变形模式，自土伦纪以来就受到叙利亚弧应力场的影响。应力场方向的变化显着影响了它们的重新激活。在其北端，WAF 可能会与 AHF 和 WSF 等预先存在的断层相交或终止，通过调节应变、耗散能量或由于 NNW-SSE 趋势的死海应力而重新激活为限制弯道来影响 WAF 的行为，导致分布式运动的复杂网络。