| 摘要: |
| 利用山东地震台网记录到的近场源地震波形数据，基于剪切波分裂研究，获得山东地区多个台站的剪切波分裂参数。研究结果表明，快剪切波偏振优势方向反映了该地区构造应力空间分布特征，CHD台和LIS台显示出2个优势偏振方向，揭示山东地区地壳介质各向异性受到区域背景应力及局部断裂构造的双重制约。 |
| 关键词: 山东地区 剪切波分裂 偏振方向 地震各向异性 构造应力 |
| DOI： |
| 分类号: |
| 基金项目:山东省自然科学基金(ZR2014DQ019)、地震科技星火计划资助项目(XH15026)、山东省地震局重点基金项目(JJ1407Y)、山东省地震局合同制项目(15Y102)资助 |
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| Tectonic stress analysis based on the crustal seismic anisotropy in the Shandong area |
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Miao Qingjie Liu Xiqiang Shi Yuyan Qu Junhao Zheng Jianchang Tian Fengdong
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Earthquake Administration of Shandong Province，Jinan 250102，China
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| Abstract: |
| Based on the seismic data of near-field source from Shandong Digital Seismic Network，the paper obtains the shear-wave splitting parameters from a number of stations in Shandong Province. The results show that dominant directions of polarizations of fast shear-waves reflect the spatial distribution characteristics of tectonic stress in this area. CHD and LIS stations show 2 dominant directions，revealing that the crustal seismic anisotropy in the Shandong area is constrained by regional stress background and local failure structure. |
| Key words: Shandong area Shearwave splitting Polarization Seismic anisotropy Tectonic stress |
