We identify and analyze a large shortening structure (surface expression of a thrust fault) in western Arabia Terra, Mars, exhibiting recent, repeated, and long-lasting tectonic activity. Where the fault system deforms Marsabit crater rim, four landslides with differing degradation states extend onto the crater floor. We propose these were triggered by episodic re-activation of the thrust system. Using a morphological map and crater size frequency statistics we show that the fault system experienced at least four landslide-inducing events during the Middle to Late Amazonian. We note that 1.4 km total displacement on the fault plane must have required many events to accumulate if motion was by brittle failure rather than continuous creep. The current understanding of tectonic activity and stress-sources since 3.6 Ga, cannot account for these repeated and large Amazonian marsquakes—suggesting revaluation of sources of stress to account for a more active and complex Amazonian tectonic history.

中文翻译：

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构造引起的山体滑坡证明了亚马逊火星上反复且持久的断层激活

我们识别并分析了火星阿拉伯地区西部的一个大型缩短结构（逆冲断层的表面表现），展示了近期、重复和长期的构造活动。在断层系统使马萨比特陨石坑边缘变形的地方，四个具有不同退化状态的滑坡延伸到陨石坑底部。我们认为这些是由推力系统的间歇性重新激活触发的。使用形态图和火山口大小频率统计数据，我们表明断层系统在亚马逊中晚期至少经历了四次滑坡诱发事件。我们注意到，如果运动是通过脆性破坏而不是连续蠕变，那么断层面上 1.4 公里的总位移必定需要许多事件来累积。目前对 3.6 Ga 以来的构造活动和应力源的理解无法解释这些重复的大型亚马逊火星地震，这表明需要重新评估应力源以解释更活跃和复杂的亚马逊构造历史。