| 东昆仑活动断裂带及其强震活动 |
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| 引用本文： | 刘光勋.东昆仑活动断裂带及其强震活动[J].中国地震,1996,12(2):119-126. |
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| 作者姓名： | 刘光勋 |
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| 作者单位： | 国家地震局地壳应力研究所 100085 |
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| 摘 要： | 本文在简述东昆仑活动断裂带的构造背景与演化历史的基础上，重点叙述了该活动断裂带的展布，几何结构，第四纪运动和强震活动等特征，指出，这是一条具有长期演化历史，深部构造背景和第四纪乃至全新强烈活动的断裂带。因而在我国大地构造演化，尤其在青藏高原隆起形成，占有重要地位，同时，它还是我国西部地区一条主要的强震活动构造带，根据现代强震活动记录和在全带新发现的多期全新世古地震及其地表破裂带，分析了大震在断裂带
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| 关 键 词： | 青藏高原 活动断裂 地震构造 古地震 地震活动性 |
Eastern Kunlun Active Fault Zone and Its Seismic Activity |
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| Liu Guangxun.Eastern Kunlun Active Fault Zone and Its Seismic Activity[J].Earthquake Research in China,1996,12(2):119-126. |
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| Authors: | Liu Guangxun |
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| Abstract: | Eastern Kunlun active fault zone is one of important large fault in the northern Tibet plateau. The fault zone consists of six secondary faults and shows a pattern of left-steping plume structure. Among secondary faults, it forms three pull-apart basins the Xiugou basin, the Alaghu lake basin and the Tuosuohu lake basin. Eastern Kunlun fault zone has showed intence left-lateral strike-slip movement since mid-Pleistocene. From late-Pleistocene, its average slip-rate is 6-7mm/a, western segment is 12-14mm/a, and it is smaller towards east. Many paleoearthquakes occurred along the fault zone in Holocene, and it formed a series of surface ruptures preserved well. Calculated recurrence interval of large earthquakes is 2000 years. Field studies indicate that the 1937 Huashixia
earthquake M71/2 formed a surface rupture which length was 180km, most level displace-
ment was 7m, and the macroscopic epicenter located at eastern coast of the Tuosuohu lake. |
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| Keywords: | Tibet plateau Active fault Seismotectonics Seismic activity Paleoearthquake |
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