Gravitational forcing of oversteepened rock mass leads to progressive failure, including rupture, creeping, sliding and eventual avalanching of the unstable mass. As the point of rupture initiation typically follows pre-existing structural discontinuities within the rock mass, understanding the structural setting of slopes is necessary for an accurate characterisation of the hazards and estimation of the risk to life and infrastructure. Northern Norway is an alpine region with a high frequency of large rock slope deformations. Inherited structures in the metamorphic bedrock create a recurring pattern of anisotropy, that, given certain valley orientations, causes mass instability. We review the geomorphology, structural mechanics and kinematics of nine deforming rock slopes in Troms County, with the aim of linking styles of deformation. The limits of the unstable rock mass follow either foliation planes, joint planes or inherited faults, depending on the valley aspect, slope angle, foliation dip and proximity to fault structures. We present an updated geotechnical model of the different failure mechanisms, based on the interpretations at each site of the review.

中文翻译：

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挪威北部结构控制的岩质边坡变形

过度陡峭岩体的重力强迫导致渐进式破坏，包括不稳定体的破裂、蠕动、滑动和最终雪崩。由于破裂起始点通常遵循岩体中预先存在的结构不连续性，因此了解斜坡的结构设置对于准确表征危害以及评估对生命和基础设施的风险来说是必要的。挪威北部是一个高山地区，大岩坡变形频率很高。变质基岩中的继承结构产生了反复出现的各向异性模式，在给定某些山谷方向时，会导致质量不稳定。我们回顾了特罗姆斯县九个变形岩质边坡的地貌、结构力学和运动学，目的是将变形类型联系起来。不稳定岩体的极限遵循叶理面、节理面或继承的断层，这取决于谷面、斜坡角度、叶理倾角和与断层结构的接近程度。我们根据审查的每个站点的解释，提出了不同破坏机制的更新岩土模型。