Laplace‐like resonances among Ganymede, Europa, and Io may have once led Ganymede to have an eccentricity (presently e  = 0.0013) as high as ~0.07 (Showman & Malhotra, 1997, https://doi.org/10.1006/icar.1996.5669). While diurnal stresses at Ganymede today are small (less than 10 kPa), a previous period of higher eccentricity may have allowed for an order of magnitude increase in the diurnal tidal stresses that could drive fault initiation and result in a past period of active tectonism. To investigate the role of tidal stresses on faulting, we use the numerical model SatStress (Wahr et al., 2009, https://doi.org/10.1016/j.icarus.2008.11.002) to calculate diurnal tidal stresses on Ganymede's surface assuming e  = 0.05, representative of a more eccentric orbit in Ganymede's past. We resolve normal and shear stresses onto discrete mapped fault segments and assess Coulomb failure criteria along three inferred shear zones on Ganymede's surface: Dardanus Sulcus, Tiamat Sulcus, and Nun Sulci. While Coulomb failure is not expected from diurnal stressing at any of the three shear zones for a diurnal model of present‐day (low) eccentricity, we do predict Coulomb failure for a past, high eccentricity case, in isolated diurnal slip windows and limited to very shallow depths (~100 to 250 m). In these cases, this model may provide an alternative to invoking additional stresses such as nonsynchronous rotation or true polar wander, as in previous studies (Cameron et al., 2019, https://doi.org/10.1016/j.icarus.2018.09.002). Additionally, this model is in general agreement with the sense of inferred shear from imagery and structural mapping.

中文翻译：

---

过去和现在的木卫三：过去的离心率如何改变潮汐驱动的库仑故障

Ganymede，Europa和Io之间类似拉普拉斯的共振可能曾经导致Ganymede的偏心率（目前为e  = 0.0013）高达〜0.07（Showman＆Malhotra，1997，https：//doi.org/10.1006/icar）。 1996.5669）。尽管今天的Ganymede的昼夜压力很小（小于10 kPa），但先前较高的偏心期可能会使昼夜潮汐压力增加了一个数量级，这可能会导致断层萌生并导致过去的活跃构造运动。为了研究潮汐应力在断层上的作用，我们使用数值模型SatStress（Wahr等人，2009，https：//doi.org/10.1016/j.icarus.2008.11.002）来计算木卫三表面的日潮汐应力。假设e = 0.05，代表了Ganymede过去更偏心的轨道。我们将法向应力和剪应力解析到离散的映射断层段上，并沿木卫三表面上的三个推断的剪切带评估了库仑破坏准则：达达努斯沟，提亚马特沟和南尼·苏尔奇。虽然对于当前（低）偏心率的日间模型，三个剪切区中任何一个的日应力都不期望发生库仑破坏，但我们确实会在过去的高偏心率情况下，在孤立的日间滑动窗口中预测库仑破坏，并且仅限于非常浅的深度（约100至250 m）。在这些情况下，如先前的研究一样，该模型可能提供了替代方法来调用其他应力，例如非同步旋转或真正的极地漂移（Cameron等人，2019，https：//doi.org/10.1016/j.icarus.2018.09 .002）。另外，