福建街面水库现代构造应力场分析
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摘要
福建街面水库将于2006年底下闸蓄水,通过收集库区的地震震源机制解资料和本次工作得到的地震震源机制解结果,以及利用中小地震求解的综合震源机制解,本文分析了街面水库库区现代构造应力场特征:最大主压应力P轴为NW—SE方向,P轴倾角为23°;主张应力T轴为NE—SW方向,T轴倾角为3°。在这样的应力场中,主要以发生走滑型断裂运动性质的地震为主,同时还具有发生正断层运动性质的地震。
This paper collects and analyzes the data of focal mechanism solution from previous researchers as well as from our own study. Our results show that the present tectonic stress field in Jiemian reservoir area is characterized by the principal compressive stress axis in NW-SE direction with obliquity of 23°, and the principal tensile stress axis in NE-SW direction with obliquity of 3°. Under the condition of such tectonic stress field earthquakes will be very likely occur in strike slip faulting and tensile slip faulting mechanism.
This paper collects and analyzes the data of focal mechanism solution from previous researchers as well as from our own study. Our results show that the present tectonic stress field in Jiemian reservoir area is characterized by the principal compressive stress axis in NW-SE direction with obliquity of 23°, and the principal tensile stress axis in NE-SW direction with obliquity of 3°. Under the condition of such tectonic stress field earthquakes will be very likely occur in strike slip faulting and tensile slip faulting mechanism.
引文
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林松建,连玉平,陈伟为,2007.水口水库地区地震震源机制解特征分析.地震,27(1):114—119.
林松建,2006.福建街面水库地震活动背景.华南地震,26(4):41—47.
宋惠珍,黄立人,华祥文,1990.地应力场综合研究.北京:石油出版社.
汪素云,许忠淮,1985.中国东部大陆的地震构造应力场.地震学报,7(1):17—32.
张林洪,周建芬,阮莉,2001.水库地震研究概述.云南水电技术,1期:70—72.
林松建,连玉平,陈伟为,2007.水口水库地区地震震源机制解特征分析.地震,27(1):114—119.
林松建,2006.福建街面水库地震活动背景.华南地震,26(4):41—47.
宋惠珍,黄立人,华祥文,1990.地应力场综合研究.北京:石油出版社.
汪素云,许忠淮,1985.中国东部大陆的地震构造应力场.地震学报,7(1):17—32.
张林洪,周建芬,阮莉,2001.水库地震研究概述.云南水电技术,1期:70—72.
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