Fault interactons on different time and length scales: the North-Tehran-Thrust (NTT) and the Mosha-Fasham-Fault (MFF), Alborz mountains, Nothern Iran

断层的传播模式和相邻断层段在挤压环境中的相互作用还没有得到很好的理解。重要的是，对断层活动性、滑动速率和运动学的分析往往导致相互矛盾的评估，需要在不同的时间尺度上对这些问题进行严格的定量评估。北德黑兰逆冲断层（NTT）和莫沙-法沙姆断层（MFF）是伊朗北方阿尔博尔兹山脉的相邻断层，它们适应了阿拉伯-欧亚大陆碰撞的斜向缩短。这两个断层系统的密切接近提供了独特的机会，研究不同时间和长度尺度上的断层段的相互作用，并评估其可能的联系。特别是，几何形状，运动学，分段，和横向传播沿着两个故障可以评估。为了解释空间和时间的断层行为，我们提出了大地构造场映射，支持航空照片，高分辨率卫星图像和数字高程模型。为了建立南部Alborz前陆的断层和变形迁移的年代学，我们将用磁性地层学、火山灰的40 Ar/39 Ar定年和地貌表面的宇宙成因核素定年（36 Cl）研究碎屑岩单元。因此，我们的工作将有助于解决测得的大地和地质派生变形率之间的差异，并有助于对破坏性地震的来源进行评估，从而有助于评估和减轻地震和相关的自然灾害。

Fault propagation patterns and interaction of neighbouring fault segments in compressional environments are not well understood. Importantly, the analysis of fault activity, slip rates, and kinematics has often resulted in contradictory assessments that call for a rigorous, quantitative assessment of these issues on different timescales. The North Tehran Thrust (NTT) and the sinsitral Mosha Fasham Fault (MFF) are neighbouring faults in the Alborz Mountains, northern Iran, which accommodate oblique shortening of the Arabia-Eurasia collision. The close proximity of both fault systems offers the unique opportunity to study the interaction of fault segments on different time and length scales and evaluate their possible linkage. In particular, geometry, kinematics, segmentation, and lateral propagation along both faults can be assessed. To decipher spatial and temporal fault behavior we propose geotectonic field mapping, supported by air photos, high-resolution satellite imagery, and digital elevation models. To develop a chronology of faulting and migration of deformation in the southern Alborz foreland, we will study clastic units with magnetostratigraphy, 40Ar/39Ar dating of tephra, and cosmogenic nuclide-dating (36Cl) of geomorphic surfaces. Our work will thus help to resolve discrepancies between measured geodetic and geologically derived deformation rates and contribute toward an assessment of the source of destructive earthquakes, and thus help to evaluate and mitigate seismic and related natural hazards.