| 断层滑动速率,地震重复时间和平均应力降 |
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| 引用本文： | 程海旭,吴开统.断层滑动速率,地震重复时间和平均应力降[J].地球物理学进展,1996,11(1):75-87. |
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| 作者姓名： | 程海旭 吴开统 |
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| 作者单位： | 国家地震局分析预报中心 |
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| 摘 要： | 本文综述了国内外大地震复发间隔研究的现状，系统整理了中国大陆活断层滑运速率，已发现的古地震遗迹及古地震复发间隔，结果表明，在滑动速率较在的活断层发现的古地震复发间隔较短，Ｋａｎａｍｏｒｉ和Ａｌｌｅ（１９８５）研究了具有大范围重复时间（２０年到几千年）的板内大地震的震源参数，发现复发间隔较长的大地震具有较高的平均应力降，我们在实验室内研究了应变速率不同时固体围压三轴压缩下完整花岗岩破裂后的粘滑现象。
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| 关 键 词： | 断层 滑动速率 地震 重复时间 应力降 |
FAULT SLIP RATE, EARTHQUAKE RECURRENCE INTERVALS AND AVERAGE STRESS DROP |
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| CHENG Haixu, WU Kaitong, ZHUANG Caotao.FAULT SLIP RATE, EARTHQUAKE RECURRENCE INTERVALS AND AVERAGE STRESS DROP[J].Progress in Geophysics,1996,11(1):75-87. |
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| Authors: | CHENG Haixu WU Kaitong ZHUANG Caotao |
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| Abstract: | In this paper, the Holocene active fault slip rate, relic locations and recurrence intervals of paleoearthquakes in China continent were systemized. The results show that active faults with large slip rate characterizes shorter paleoearthquake recurrence intervals and the average stress drop. The friction slip after the intact granite fracturing under solid confining medium triaxial pressure were studied in this paper. The results show that the increasing of strain rate the mode of temporal distribution and the recurrence intervals are quite diverse.There are three modes of recurrence: single mode, clustering mode and mixed mode.When strain rate is lower, strain rate produce a weak impact on the stress drop, but there a more rapid decrease in stress drop with the increasing of strain rate. With increasing strain rate, the main fracture developed into a single fracture. The stress drop of stick slip events seem corresponding to the geometry patterns of main fracture. When the main fracture appears as two conjugate fractures, the stress drop is higher. When the main fracture appears as a single fracture, the stress drop is lower. There is only a weak relation between stress drops and recurrence intervals of stick slip events.We can conclude that the strain rate produce a great impact on stress and recurrence intervals of stick slip events and roughness and patterns of rock samples. |
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| Keywords: | Active faults slip rate paleoearthquake recurrence intervals stick slip stress drop strain rate |
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