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首页> 外文期刊>Oceanographic Literature Review >Present Tectonic Stress Field in Liaoning Area Based on Earthquake Focal Mechanisms
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Present Tectonic Stress Field in Liaoning Area Based on Earthquake Focal Mechanisms

机译：基于地震焦点机制的辽宁地区目前的构造应力场

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摘要

The Liaoning Seismic Network has been continuously improved in recent years, which provides a better data basis for solving tectonic stress fields through earthquake focal mechanisms than before. We selected a total of 228 focal mechanisms from Global CMT and domestic publications from 1976 to 2015, weighted the data according to the magnitude of the earthquake, inversed the present tectonic stress field in Liaoning and gave its uncertainty range by the global grid search method. The results show that the principal compressive stress axis of the entire Liaoning region is in NEE direction, and the tensile stress axis is mainly NNW direction, and it is nearly north-south direction in the Western Liaoning uplifts. The stress shape ratio close to 1 reflects that due to the northwest-west subduction of the Eurasian plate by the western Pacific plate, the upper mantle asthenosphere is uplifted, and the Liaoning region is in a state of tension. The results of this study and the tectonic features revealed can provide some reference for the further research on the earthquake preparation mechanism and geodynamic process in Liaoning.
机译：近年来，辽宁地震网络一直在不断改进，为通过地震焦点机制求解构造应力场提供更好的数据依据。我们从1976年到2015年的全球CMT和国内出版物中选择了228个局灶权机制，根据地震幅度加权数据，反映了辽宁当前构造应力场，并通过全球网格搜索方法给出了不确定性范围。结果表明，整个辽宁区域的主要压缩应力轴线处于NEE方向，拉伸应力轴线主要是NNW方向，并且在辽宁西部隆起中几乎南北方向。靠近1的应力形状比反映了由于西太平洋板欧亚板材的西北刨削，升高的壁球圈被提升，辽宁地区处于张力状态。本研究的结果和所揭示的构造特征可以对辽宁地震制备机理和地球动力学过程进行进一步研究。

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