The South Polar Terrain (SPT) of Enceladus is a site with eruptions of gas and water ice particle plumes, which indicate internal geodynamic activity. These eruptions are located along a series of tectonic structures, that is, the Tiger Stripe Fractures (TSF), which are composed of regularly spaced, linear depressions. The SPT is surrounded by sinuous chains of ridges and troughs (the Marginal Zone). To unravel the tectonics that affect the region and its evolution, we performed specific structural mapping and quantitative analyses of brittle features from remotely sensed images. The results are consistent with a block rotation model, in which several tectonic regimes coexist. The TSF are left‐lateral strike‐slip faults that bound rigid elongated blocks. The blocks rotate clockwise and are enclosed in a regional scale right‐lateral kinematic framework expressed in the Marginal Zone. These two opposite and complementary kinematic regimes induce transtensional and transpressional regimes within the SPT. An evolutionary tectonic model is proposed for the past and future evolution of the SPT. This model confirms the role of tectonic‐related kinematics in icy satellites and contributes to preparations for future missions.

中文翻译：

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土卫二南极构造：老虎条纹的块状旋转

土卫二的南极地形（SPT）是一个带有气态和水冰状粒子羽状喷发的地点，这表明了内部的地球动力学活动。这些火山喷发沿一系列构造结构定位，即老虎条纹断裂（TSF），由规则间隔的线性凹陷组成。SPT周围是蜿蜒的山脊和低谷（边缘区）。为了弄清影响该地区及其演化的构造，我们对遥感图像进行了特定的结构映射和脆性特征的定量分析。结果与一个块旋转模型一致，在该模型中几种构造机制共存。TSF是界定刚性细长块的左走向走滑断层。这些块顺时针旋转，并封装在以边际带表示的区域尺度的右侧运动学框架中。这两个相反的和互补的运动学方案在SPT内诱发了张性和压性方案。提出了SPT的过去和未来演化的演化构造模型。该模型证实了与构造有关的运动学在冰冷卫星中的作用，并为未来任务的准备做出了贡献。