活动走向滑动断层、断裂和地震灾害。伊朗西南部扎格罗斯山脉 Kareh Bas 断层及相关的 Dandenjan 盐挤压案例

IF 2.6 2区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY Journal of Structural Geology Pub Date : 2024-08-22 DOI:10.1016/j.jsg.2024.105239
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引用次数: 0

摘要

人们很少对走向滑动的盐陡坡系统进行研究,可能对其认识不足。在扎格罗斯山脉的法尔斯弧西部,有一个最显著的例子,即在斜碰撞环境中与地震发生的走向滑动断层相关的盐层挤压。本研究主要基于在 Kareh Bas 断层系统和 Dandenjan Diapir 进行的实地测绘和观测,探讨了与这些活跃断层-盐系统有关的几个具有实际意义的问题:(1) 前兆断裂带对缩短结构形成的作用;(2) 受前兆断裂带控制的断层分段、断裂带的出现以及拉裂盆地的形成;(3) 与走向滑动断层扩展相关的盐挤压出现的相对时间;(4) 与 Kareh Bas 断层相关的第四纪变形和古地震证据;(5) 盐脱离深度对分段 Kareh Bas 断层系统的成震潜力的影响;(6) Kareh Bas 断层系统附近可能发生共震的大型滑坡群。
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Active strike-slip faulting, diapirism and seismic hazards. The case of the Kareh Bas fault and the associated Dandenjan salt extrusion in the zagros Mountains, SW Iran

Strike-slip salt diapir systems have been scarcely investigated and have probably been underrecognized. The western Fars Arc of the Zagros Mountains hosts the most remarkable example of salt extrusions associated with seismogenic strike-slip faults within an oblique collisional setting. This study, mainly based on field mapping and observations carried out in the Kareh Bas fault system and the Dandenjan Diapir, explores several issues with practical implications related to these active fault-salt systems: (1) role of precursor diapirs on the initiation of shortening structures; (2) fault segmentation controlled by precursor diapirs, emergence of diapirs, and the development of pull-apart basins; (3) the relative timing of emergence of salt extrusions associated with a propagating strike-slip fault; (4) Quaternary deformation and paleoseismic evidence associated with the Kareh Bas fault; (5) the impact of the salt detachment depth on the seismogenic potential of the segmented Kareh Bas fault system; and (6) clustering of large potentially coseismic landslides in the vicinity of the Kareh Bas fault system.

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来源期刊
Journal of Structural Geology
Journal of Structural Geology 地学-地球科学综合
CiteScore
6.00
自引率
19.40%
发文量
192
审稿时长
15.7 weeks
期刊介绍: The Journal of Structural Geology publishes process-oriented investigations about structural geology using appropriate combinations of analog and digital field data, seismic reflection data, satellite-derived data, geometric analysis, kinematic analysis, laboratory experiments, computer visualizations, and analogue or numerical modelling on all scales. Contributions are encouraged to draw perspectives from rheology, rock mechanics, geophysics,metamorphism, sedimentology, petroleum geology, economic geology, geodynamics, planetary geology, tectonics and neotectonics to provide a more powerful understanding of deformation processes and systems. Given the visual nature of the discipline, supplementary materials that portray the data and analysis in 3-D or quasi 3-D manners, including the use of videos, and/or graphical abstracts can significantly strengthen the impact of contributions.
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