The Causes of Tectonic and Seismic Activity of the Liskin Fault Zone (the Southeastern Voronezh Uplift, the East European Platform)

IF 0.3 Q4 GEOLOGY Moscow University Geology Bulletin Pub Date : 2023-11-16 DOI:10.3103/s0145875223040129

T. V. Sukhanova, N. V. Makarova, A. N. Stafeev, L. I. Nadezhka, A. I. Tregub, I. T. Ezhova, A. E. Semenov

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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.

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东欧地台东南沃罗涅日隆起带利斯金断裂带构造与地震活动成因

摘要本文考虑了位于东欧地台东南部的利斯金断裂带，该断裂带位于沃罗涅日隆起和奥卡顿盆地两个大型新构造的交界处。地震震中集中在断裂带及其邻近地区。研究了区内新构造构造、地形、沉积盖层、基底、地壳、莫霍面多深度和年龄层的构造，确定了该区新构造和地震活动的原因。目前，利斯金断裂发育为一条在淹没挤压条件下具有右旋走滑成分的逆冲断裂，邻近地区受多方向构造挤压应力的影响:北至欧卡东盆地，南至阿尔卑斯碰撞带高加索段。这反映在新构造构造的形态和构造上。多深度层位的变形以及地表的变形和地震活动性的激活都与淹没压缩有关。地壳深层物质和结构的不均匀性是非常重要的。在东欧地台东南部新构造构造中，首次发现了导致地震活动的两个对向俯冲应力碰撞带。

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来源期刊

Moscow University Geology Bulletin GEOLOGY-

CiteScore

0.60

自引率

25.00%

发文量

期刊介绍： Moscow University Geology Bulletin is the journal that mainly publishes scientific articles, short reports of graduate students, and reviews. Publications made by the members of the Faculty of Geology of the Moscow State University and their collaborators are published. Publications encompass all branches of geology.