| 新丰江水库地震震源应力场与构造应力场 |
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| 引用本文： | 魏柏林. 新丰江水库地震震源应力场与构造应力场[J]. 地震地质, 1981, 3(1): 75 |
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| 作者姓名： | 魏柏林 |
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| 作者单位： | 广东省地震局 |
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| 摘 要： | 引言新丰江水库自蓄水后,发生了一系列地震。区内存在三件基本事实:一、河源断裂近期具左旋错动;二、地震主要沿水库狭谷区呈北西西向分布,河源断裂本身很少地震活动;三、震源机制解表明,主张应力轴(T)稳定于北北东向,近于水平,主压应力轴(P)则在垂
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| 关 键 词： | 新丰江水库 构造应力场 地震震源 北北东向 倾滑型地震 震源应力场 岩块 转换应力场 左旋错动 震源机制解 |
FOCAL STRESS FIELD AND TECTONIC STRESS FIELD OF THE XINFENGJIANG RESERVOIR INDUCED EARTHQUAKES |
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| Abstract: | The focal stress field of the Xinfengjiang earthquakes shows that the T-axis constantly trends towards NNE and is nearly horizontal, but the P-axis rotates from 0?to 180?in a vertical plane perpendicular to the T-axis. Under the N-S horizontal tectonic compression the focal stress field is induced by a left-lateral transform fault at Heyuan resulting from the relative sliding between the rock mass in the reservoir area and on its southern side at different rate |
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