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首页> 外文期刊>International Journal of Earth Sciences >Active normal faulting along the Mt. Morrone south-western slopes (central Apennines, Italy)
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Active normal faulting along the Mt. Morrone south-western slopes (central Apennines, Italy)

机译：沿山活动正常断裂。 Morrone西南斜坡（意大利亚平宁山脉中部）

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In the present work we analyse one of the active normal faults affecting the central Apennines, i.e. the Mt. Morrone normal fault system. This tectonic structure, which comprises two parallel, NW-SE trending fault segments, is considered as potentially responsible for earthquakes of magnitude > 6.5 and its last activation probably occurred during the second century AD. Structural observations performed along the fault planes have allowed to define the mainly normal kinematics of the tectonic structure, fitting an approximately N 20° trending extensional deformation. Geological and geomorphological investigations performed along the whole Mt. Morrone south-western slopes permitted us to identify the displacement of alluvial fans, attributed to Middle and Late Pleistocene by means of tephro-stratigraphic analyses and geomorphological correlations with dated lacustrine sequences, along the western fault branch. This allowed to evaluate in 0.4 ± 0.07 mm/year the slip rate of this segment. On the other hand, the lack of synchronous land-forms and/or deposits that can be correlated across the eastern fault segment prevented the definition of the slip rate related to this fault branch. Nevertheless, basing on a critical review of the available literature dealing with normal fault systems evolution, we hypothesised a total slip rate of the fault system in the range of 0.4 ± 0.07 to 0.8 ± 0.09 mm/year. Moreover, basing on the length at surface of the Mt. Morrone fault system (i.e. 22-23 km) we estimated the maximum expected magnitude of an earthquake that might originate along this tectonic structure in the order of 6.6-6.7.
机译：在目前的工作中，我们分析了影响中央亚平宁山脉的活动正常断层之一，即Mt. Morrone正常故障系统。这种构造结构包括两个平行的NW-SE趋势断层，被认为是造成6.5级以上地震的潜在原因，其最后一次激活可能发生于公元二世纪。沿着断层平面进行的结构观测已经允许定义构造结构的主要法线运动学，拟合了大约N 20°的趋势延伸变形。沿整个山进行了地质和地貌调查。 Morrone西南斜坡使我们能够通过西部地层断层分支的年代学-地层学分析以及与日期相近的湖相序列的地貌相关性，来识别冲积扇的位移，这归因于中更新世和晚更新世。这样就可以以0.4±0.07 mm /年的速度评估该部分的滑移率。另一方面，由于缺乏可在东部断层段上关联的同步地貌和/或沉积物，因此无法确定与此断层分支有关的滑移率。然而，基于对有关正常断层系统演化的现有文献的严格评论，我们假设断层系统的总滑移率在0.4±0.07至0.8±0.09 mm /年的范围内。而且，根据山的表面长度。 Morrone断层系统（即22-23公里）我们估计可能沿着该构造结构发生的地震的最大预期震级约为6.6-6.7。

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