Abstract

The Liskin fault zone located in the southeastern part of the East European Platform at the boundary between two large neotectonic structures, that is, the Voronezh Uplift and the Oka–Don basin, is considered. Earthquake epicenters are concentrated in the fault zone and the adjacent territory. The neotectonic structures of the territory, topography, structure of the multi-depth and age horizons of the sedimentary cover, basement, crust, Moho surface are investigated, and the causes of neotectonic and seismic activity of the zone are determined. At present, the Liskin fault develops as a thrust fault with a dextral strike-slip component under the conditions of submeridional compression and the adjacent territory is under the influence of multidirectional tectonic compression stresses: from the north, from the Oka–Don basin and from the south, from the Caucasian segment of the Alpine collision belt. This is reflected in the morphology and structure of the neotectonic structures. The deformation of multi-depth horizons as well as the Earth’s surface and the activation of seismicity are associated with the submeridional compression. The deep material and structural inhomogeneities of the Earth’s crust are of great importance. The collision zone between two oncoming submeridional stresses that led to active seismicity has been identified in the neotectonic structure of the south-eastern part of the East European Platform for the first time.

中文翻译：

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利斯金断裂带（沃罗涅日隆起东南部、东欧地台）构造与地震活动成因

摘要

利斯金断裂带位于东欧地台东南部，位于沃罗涅日隆起和奥卡顿盆地这两个大型新构造构造的边界处。地震震中集中在断裂带及邻近地区。调查了该区的疆域新构造结构、地形地貌、沉积盖层、基底、地壳、莫霍面的多深度、多时代层位结构，确定了该区新构造运动和地震活动的成因。目前，利斯金断层在俯冲挤压条件下发育为具有右旋走滑分量的逆冲断层，邻近地区受到多向构造挤压应力的影响：来自北部、来自奥卡-顿河盆地和来自南部，来自阿尔卑斯碰撞带的高加索部分。这反映在新构造构造的形态和结构上。多深度层位以及地球表面的变形和地震活动的激活与地下压缩有关。地壳深层物质和结构的不均匀性非常重要。首次在东欧地台东南部的新构造结构中发现了导致活跃地震活动的两个迎面而来的地下应力之间的碰撞带。