Abstract This study focuses on structure and kinematics of the 1979 Mw 7.1 Montenegro earthquake. Although this event represents the strongest instrumentally recorded event in the entire Dinarides-Hellenides fold-and-thrust belt, no tectonic model relating this event to any particular fault existed so far. We combined onshore geological information with well logs, seismic lines, bathymetric data, seismotectonic and seismological data as well as cross-section balancing techniques into a new structural model for the area. Our results suggest that main shock and strongest aftershock (MW 6.2) occurred on the NE-dipping basal thrust of a largely Palaeogene-age nappe system involving Cretaceous neritic carbonates. Ongoing propagation of this thrust system is documented by the existence of elongated ridges located 15 km offshore. Reflection seismic and bathymetry data reveal that the ridges form crests of actively growing fault-related anticlines. Slip distribution models of the strongest events imply that the basal thrust below the ridges accommodated up to 2.7 m of coseismic displacement. Ongoing shortening along the basal thrust also induced surface uplift of structurally higher thrust imbricates, evidenced by dry valleys incising onshore anticline crests. Combining all evidence, we speculate that the observed structural and geomorphic features resulted from repeated seismogenic faulting events as in 1979.

中文翻译：

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Dinarides 褶皱冲断带的持续缩短：1979 年（Mw 7.1）黑山地震震中区的新结构模型

摘要 本研究侧重于 1979 年 Mw 7.1 黑山地震的结构和运动学。尽管该事件代表了整个 Dinarides-Hellenides 褶皱冲断带中最强的仪器记录事件，但迄今为止尚不存在将此事件与任何特定断层相关联的构造模型。我们将陆上地质信息与测井、地震测线、测深数据、地震构造和地震学数据以及横截面平衡技术相结合，形成了该地区的新结构模型。我们的研究结果表明，主震和最强余震（MW 6.2）发生在一个主要涉及白垩纪浅海碳酸盐岩的古近纪推覆系统的 NE 倾角基底逆冲断层上。位于离岸 15 公里处的细长脊的存在记录了该推力系统的持续传播。反射地震和测深数据表明，这些脊形成了活跃生长的断层相关背斜的波峰。最强事件的滑动分布模型意味着山脊下方的基底推力可容纳高达 2.7 m 的同震位移。沿着基底逆冲断层的持续缩短也导致构造较高逆冲覆瓦状结构的地表隆升，干谷切割陆上背斜波峰就证明了这一点。结合所有证据，我们推测观察到的结构和地貌特征是由 1979 年的重复发震断层事件造成的。沿着基底逆冲断层的持续缩短也导致构造较高逆冲覆瓦状结构的地表隆起，干谷切割陆上背斜波峰就证明了这一点。结合所有证据，我们推测观察到的结构和地貌特征是由 1979 年的重复发震断层事件造成的。沿着基底逆冲断层的持续缩短也导致构造较高逆冲覆瓦状结构的地表隆升，干谷切割陆上背斜波峰就证明了这一点。结合所有证据，我们推测观察到的结构和地貌特征是由 1979 年的重复发震断层事件造成的。