板内逆断层地震破裂的基本特征及分段标志研究
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摘要
通过对１６ 个板内逆断层地震的基本类型、构造环境、地震地表破裂尺度、几何形态、运动学特征及余震分布图像的研究分析，较系统地归纳了板内逆断层地震破裂的基本特征及分段标志．研究表明：（１） 逆断层破裂往往沿走向延伸较短，常表现为二维面状分布形态；（２） 地震断层未出露地表或仅有部分出露地表；（３） 逆断层地震破裂较走滑断层和正断层产生的地震破裂更为复杂，不仅表现在构成整体破裂带的各个单条破裂的力学性质差异方面，而且表现在几何结构方面．
The basic characteristics of earthquake rupture of intraplate reverse fault and sign of its segmentation have been discussed in detail based on the type and size of surface rupture,tectonic environment, geometric form,kinematics character,as well as the aftershock distribution patterns for 16 intraplate earthquakes produced by reverse fault in the world wide.The result shows that earthquake ruptures of reverse fault are different from that of strike slip fault and normal fault.The rupture size along the strike for reverse fault is much more short,and the rupture pattern often has a two dimensional plane distribution.The seismic fault does not show on the ground or only part of seismic fault shows on the ground.The earthquake ruptures of reverse fault are still complexer than that of the strike slip fault and normal fault in the mechanics character of an individual fracture and the geometric structure.
The basic characteristics of earthquake rupture of intraplate reverse fault and sign of its segmentation have been discussed in detail based on the type and size of surface rupture,tectonic environment, geometric form,kinematics character,as well as the aftershock distribution patterns for 16 intraplate earthquakes produced by reverse fault in the world wide.The result shows that earthquake ruptures of reverse fault are different from that of strike slip fault and normal fault.The rupture size along the strike for reverse fault is much more short,and the rupture pattern often has a two dimensional plane distribution.The seismic fault does not show on the ground or only part of seismic fault shows on the ground.The earthquake ruptures of reverse fault are still complexer than that of the strike slip fault and normal fault in the mechanics character of an individual fracture and the geometric structure.
引文
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[2] Mason H L. Earthquake and folding[ J] . Conlinga Geology ,1984 ,12 :711 ～722 .
[3] 邓起东.断层性状、盆地类型及其形成机制[ J] .地震科学研究,1984 ,(5) :58 ～64 .
[4] Jamison W R. Geometric analysis of fold developmentin overthrust terranes[ J] . J Str Geo ,1987 ,9(2) :231 ～243 .
[5] Berberian M. Aftershock tectonics ofthe 1978 Tabase Golshan( Iron) earthquake sequence:a documented active“thinandthickshinned”[ J] . Geophys J R Astr Soc,1982 ,68 :499 ～530 .
[6] 丁国瑜,田勤俭,孔凡臣,等.活断层分段原则、方法及应用[ M] .北京:地震出版社,1993 .
[7] 侯康明.1927 年古浪8 级大震地表破裂特征及形成机制[ J] .地震地质,1998 ,20(1) :9 ～19 .
[8] 张培震,邓起东,徐锡伟,等.盲断裂、“褶皱地震”与1906 年玛纳斯地震[ J] .地震地质,1994 ,16(3) :193 ～204 .
[9] 马宗晋( 编) .活动构造基础与工程地震[ M] .北京:地震出版社,1992
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