Abstract

The highly seismic Black-Sea–Caspian region contains conjugate mountain edifices of the Caucasus, Alborz, and Kopet Dagh, the Rioni and Kura intermontane troughs, and the deep southern Caspian basin. The goal of the present study is to determine potential sites of larger (М ≥ 7.0) earthquakes in the region. This was done using the methodology designed for identification of sites of possible large earthquakes. The earthquake-generating features are considered to be intersections of morphostructural lineaments as identified by morphostructural zoning. The epicenters of М ≥ 7.0 earthquakes correlate with lineament intersections. The Kora-3 pattern recognition algorithm was used to separate all intersections in the region into high- and low-seismicity ones with respect to М ≥ 7.0 based on the geological and geomorphologic parameters that characterize vicinities of intersections. The result was to recognize 150 intersections as having potential for М ≥ 7.0 earthquakes of a total of 510 intersections that were found in the region by morphostructural zoning. All of these intersections are within mountain belts. No intersections that can generate М ≥ 7.0 earthquakes have been identified in the intermontane troughs and within the southern Caspian deep-sea basin, whose crust is thinner. According to the geological and geomorphologic features of high seismicity intersections, as identified here, they are characterized by high contrasts in neotectonic movements and increased crustal fragmentation.

中文翻译：

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形态结构高地震交集：黑海-里海地区

摘要

地震烈度很高的黑海-里海地区包括高加索，阿尔伯兹和科佩特达，里奥尼和库拉的山间槽以及南部里海盆地深处的共轭山地。本研究的目的是确定该地区较大（М≥7.0）地震的潜在地点。这是使用旨在识别可能的大地震地点的方法完成的。发生地震的特征被认为是通过形态构造分区确定的形态构造线相交。М≥7.0级地震的震中与线性相交有关。使用Kora-3模式识别算法将区域中的所有交点相对于М分为高地震和低地震≥7.0基于表征交叉口附近区域的地质和地貌参数。其结果是承认150个交点为具有用于潜在М  ≥总共510个交点通过morphostructural分区在该区域中发现的7.0地震。所有这些交叉点都在山区内。在山间槽和里海南部深海盆地（地壳较薄）内，没有发现可能引起М≥7.0地震的交叉口。根据此处确定的高地震交集的地质和地貌特征，它们的特征是新构造运动的强烈反差和地壳破碎的增加。