The Dead Sea Transform (DST) was formed in the Mid-Cenozoic, about 18 Myr ago, as a result of the breakaway of the Arabian plate from the African plate. Higher resolution information about the sub-Moho structure is still sparse in this region. Here we study seismic discontinuities in the mantle lithosphere in the region of the DST using a modified version of the P- and S-receiver function method. We use open data from permanent and temporary seismic stations. The results are displayed in a number of depth profiles through the study area. The Moho is observed on both sides of the transform at nearly 40 km depth by S-to-p and in P-to-s converted signals. The lithosphere-asthenosphere boundary (LAB) on the eastern side of the DST is observed near 180–200 km depth, which is according to our knowledge the first LAB observation at that depth in this region. This observation could lead to the conclusion that the thickness of the Arabian lithosphere east of the DST is likely cratonic. In addition, we observe in the entire area a negative velocity gradient (NVG) at 60–80 km depth, which was previously interpreted as LAB.

中文翻译：

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死海转变中岩石圈地幔的地震不连续性

死海转化（DST）是在约18 Myr以前的中新生代形成的，这是阿拉伯板块从非洲板块脱离的结果。在此区域中，有关子Moho结构的高分辨率信息仍然很少。在这里，我们使用P和S接收器函数方法的改进版本来研究DST区域地幔岩石层中的地震不连续性。我们使用来自永久性和临时性地震台站的开放数据。结果显示在整个研究区域的许多深度剖面中。通过S-to-p和P-to-s转换信号，可以在近40 km深度的变换的两侧观察到Moho。在DST东侧的岩石圈-软流圈边界（LAB）的观测深度约为180-200 km，据我们所知，这是该区域内该深度的首次LAB观测。这一观察结果可以得出这样的结论，即DST以东的阿拉伯岩石圈的厚度可能是克拉通的。此外，我们在整个区域观察到60-80 km深度处的负速度梯度（NVG），以前将其解释为LAB。