Abstract—In 2014–2019, integrated geological and geophysical studies were carried out in the largest flexural-rupture and fold-and-fault zones of the Northwest Caucasus (the Anapa, Akhtyr, Moldavanovka, Karabetov, Fanagoria and Azov anticlinal ridges and the Pshekha–Adler, Kerch–Tuzla, and Kerch Strait faults). Microseismic sounding method (MSM) was the main geophysical approach. The MSM studies identified the deep structural features of the Earth’s crust in the study region and made it possible to correlate them with the specific tectonic structures on the surface. The correlation was established by reconciling the results of the MSM studies, the parameters of sedimentary cover section, and crustal discontinuities revealed by drilling and previous studies of the converted waves from the earthquakes. It is found out that the Anapa flexure and longitudinal tectonic zones have the distinct deep roots beneath them. The trans-Caucasian Anapa flexural-rupture zone separates the pericline of the Northwest Caucasus from the region of the Taman Peninsula, whereas longitudinal flexures and fault structures divide the meganticlinorium from the subsided West Kuban and Azov blocks of the northern slope of the folded system and from the Kerch–Taman trough of the southern framing of the Northwest Caucasus. The faults in the study region are distinguished into deep faults penetrating into the lower crust and even reaching the upper mantle and near-surface faults localized within the sedimentary cover in the Earth’s interior. The seismogenic role of these tectonic deformations in the studied seismic region is determined.

中文翻译：

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从新地质和地球物理数据看高加索西北端深部结构

摘要——2014-2019 年，在西北高加索最大的弯曲断裂和褶皱断层带（Anapa、Akhtyr、Moldavanovka、Karabetov、Fanagoria 和 Azov 背斜脊和 Pshekha –阿德勒断层、刻赤-图兹拉断层和刻赤海峡断层）。微地震探测方法（MSM）是主要的地球物理方法。MSM 研究确定了研究区域地壳的深层结构特征，并使它们与地表的特定构造结构相关联成为可能。这种相关性是通过将 MSM 研究的结果、沉积盖层剖面参数和钻井揭示的地壳不连续性和先前对地震转换波的研究进行调和来建立的。发现阿纳帕弯曲和纵向构造带在其下方具有明显的深根。跨高加索阿纳帕弯曲破裂带将西北高加索的周线与塔曼半岛地区分开，而纵向弯曲和断层结构将巨斜线与折叠系统北坡的下沉西库班和亚速块分开，来自西北高加索南部框架的刻赤-塔曼海槽。研究区断层分为穿透下地壳甚至到达上地幔的深断层和位于地球内部沉积盖层内的近地表断层。确定了这些构造变形在所研究的地震区中的发震作用。