The axial fault-bounded depression of the South Kenya rift (SKR) locally displays anomalously wide sectors resulting from the presence of one (or many) elevated and offset block(s) on the flanks of the main trough. Very little attention has been paid so far to the nature of the driving mechanisms responsible for these atypical rift patterns. New insights are supplied by the Natron-Ol Doinyo Ogol rift segment at the southern extremity of the SKR, immediately north of the North Tanzanian Divergence (NTD). On the basis of interpreted SRTM-30 satellite imagery and Digital Elevation Models, our work allows us: i) to depict the highly-segmented arrangement of the ~7 Ma-lasted SKR system, ii) to establish a two-stage kinematic rift model that emphasizes the role of an inherited transverse discontinuity on the arrest, as well as lateral jump and off-axis development of anomalously-propagating rift structures, iii) to define the relative contribution of border vs inner fault networks to the total extension, which is estimated at 7–6 km (11.6–9.2%), and iv) to emphasize that inner faulting was not the dominant mode of strain accommodation during recent inward focussing of strain, and that no sharp transition exists from border fault- to intra-rift fault-dominated strain accommodation over time in the SKR immature rift system.

南肯尼亚裂谷 (SKR) 的轴向断层边界凹陷局部显示出异常宽的扇区，这是由于主槽侧翼存在一个（或多个）抬高和偏移块体。到目前为止，很少有人关注导致这些非典型裂谷模式的驱动机制的性质。位于 SKR 南端的 Natron-Ol Doinyo Ogol 裂谷段提供了新的见解，紧邻北坦桑尼亚分流 (NTD) 以北。在解释的 SRTM-30 卫星图像和数字高程模型的基础上，我们的工作使我们能够：i) 描绘 ~7 Ma 持续 SKR 系统的高度分段排列，ii) 建立两阶段运动学裂谷模型强调了继承的横向不连续性对逮捕的作用，与内部断层网络相对于总延伸，估计为 7-6 公里（11.6-9.2%），和 iv) 强调在最近的应变向内集中期间，内部断层不是应变调节的主要模式，并且没有在 SKR 未成熟裂谷系统中，随着时间的推移，存在从边界断层到裂谷内断层主导的应变适应的急剧转变。