郯庐断裂带及邻区深孔地应力测量与地震地质意义

发布时间：2018-05-26 04:30

本文选题：郯庐断裂带 + 地应力　；参考：《地球物理学进展》2017年03期

【摘要】：郯庐断裂带是中国东部大陆一条深大断裂带,也是规模最大的第四纪活动构造带和地震活动带,断裂带及邻区现代构造应力场明显控制了活动断裂的运动方式、活动强度和地震活动等,深入研究郯庐断裂带及邻区地壳浅层应力环境,对于探讨断裂带现今活动性无疑具有重要的科学意义.在总结前人研究成果的基础上,本文首先依据郯庐断裂带及邻区(山东-环渤海-辽宁)6个600~1000 m深孔地应力实测数据,初步揭示断裂带及邻区地壳浅层应力分布规律,并分析其在不同构造部位之间的差异;其次,结合研究区已有其他基础应力数据(震源机制解、钻孔崩落、应力解除及断层滑动矢量反演数据等),详细分析断裂带及邻区现今构造应力场及其对断裂活动方式的影响;最后依据库仑破裂摩擦准则,从力学角度分别探讨不同的应力状态和摩擦强度对郯庐断裂带山东、渤海及辽宁段现今活动稳定性的影响,同时参考断裂带及邻区近代地震活动分布特征,积极探索活动断裂带附近深孔地应力测量在地震地质研究领域中的应用思路.
[Abstract]:The Tanlu fault zone is a deep fault zone in eastern China, and is also the largest Quaternary active tectonic belt and seismicity zone. The modern tectonic stress field in the fault zone and its adjacent area has obviously controlled the movement of active faults. It is undoubtedly of great scientific significance to study the crustal shallow stress environment of the Tanlu fault zone and its adjacent area, such as the active intensity and seismic activity, which is of great scientific significance to the study of the present activity of the fault zone. On the basis of summing up the previous research results, this paper first reveals the distribution of crustal stress in the fault zone and its adjacent area (Shandong, Bohai Rim and Liaoning), based on the measured data of 6 600 ~ 1 000 m deep holes in the fault zone and its adjacent area. The differences between different structural sites are analyzed. Secondly, there are other basic stress data (focal mechanism solution, borehole caving, and so on) in the study area. Stress relief and inversion data of fault sliding vector are used to analyze the current tectonic stress field in the fault zone and adjacent area and its influence on the mode of fault activity, and finally, according to the Coulomb fracture friction criterion, the current tectonic stress field in the fault zone and its adjacent area are analyzed in detail. The effects of different stress states and friction strength on the present active stability of the Shandong, Bohai and Liaoning sections of the Tanlu fault zone are discussed from the mechanical point of view, and the distribution characteristics of modern seismic activities in the fault zone and adjacent areas are also referred to. This paper actively explores the application of deep hole stress measurement near active fault zone in the field of seismic geology.
【作者单位】：中国地质科学院地质力学研究所;国土资源部新构造运动与地质灾害重点实验室;
【基金】：中国地质调查局项目“京津冀协同发展区活动构造与区域地壳稳定性调查”(121201104000150012) 中国地质科学院地质力学研究所基本科研业务费项目“京津冀地区地下空间地质环境调查预研究”联合资助
【分类号】：P315.2

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