地震地质 ›› 2006, Vol. 28 ›› Issue (1): 12-21.

• 研究论文 • 上一篇    下一篇

对1937年托索湖7.5级地震若干问题的探讨

李陈侠1,2, 戴华光2, 陈永明2, 徐锡伟1, 代炜2   

  1. 1. 中国地震局地质研究所, 北京, 100029;
    2. 中国地震局地震预测研究所兰州基地, 兰州, 730000
  • 收稿日期:2004-04-05 修回日期:2005-11-27 出版日期:2006-03-09 发布日期:2009-08-27
  • 作者简介:李陈侠,女,1975年生,1998年毕业于河北地质学院水文地质与工程地质专业,2003年在中国地震局兰州地震研究所获得构造地质学硕士学位,2003年至今在中国地震局地质研究所攻读博士学位,研究方向为活动构造和数据库,电话:010-62009416,E-mail:lcxwzx@sohu.com.
  • 基金资助:
    科技部基础专项(JC200016)资助。

THE DISCUSSION ON SOME PROBLEMS OF THE Ms7.5 TUOSUOHU LAKE EARTHQUAKE IN 1937

LI Chen-xia1,2, DAI Hua-guang2, CHEN Yong-ming2, XU Xi-wei1, DAI Wei2   

  1. 1. Institute of Geology, China Earthquake Administration, Beijing 100029, China;
    2. Lanzhou Base of Institute of Earthquake Prediction, China Earthquake Adiministration, Lanzhou 730000, China
  • Received:2004-04-05 Revised:2005-11-27 Online:2006-03-09 Published:2009-08-27

摘要: 1937年托索湖7.5级地震发生在东昆仑活动断裂带的东段,前人曾对该地震组织过4次不同程度的考察,并得出了4种不同的结果。带着上述问题对该地震地表破裂带重新进行了实地考察、测量和综合研究,然后对该地震地表破裂带的西端点、最大左旋水平位移量、最大垂直位移量、宏观震中等问题进行了重新厘定,认为1937年托索湖7.5级地震地表破裂带西端点在阿拉克湖以西,长度至少为240km,最大左旋水平位移量为8m,垂直位移量为3.5m,宏观震中在三岔口一带。

关键词: 东昆仑活动断裂带, 托索湖7.5级地震, 地震地表破裂带, 宏观震中

Abstract: The East Kunlun active fault zone, which lies in the valley of the Kunlun Mountains above the elevation of 4,000 meters, is an important active fault in the Northeast Tibetan Plateau. The Tuosuohu Lake earthquake of magnitude 7.5 in 1937 occurred in the eastern segment of the East Kunlun active fault zone. Four field investigations have been launched on this seism in 1963,1971 and between 1986 and 1990 respectively, and four different conclusions have been gained. From the length aspect of the surface deformation zone of this earthquake, it is commonly recognized that its east end lies in the west side of the main Ridge of Animaqing Mountains; the opinion about the west end and the location of the macro-epicenter is different. Based on our investigation and comprehensive study, a series scientific problems like geometric and kinetic characteristics, the length of the rupture zone, the maximum sinistrally horizontal displacement and the macro-epicenter were reestimated. It is considered that the total length of this zone should be at least 240km; the maximum sinistrally horizontal displacement is 8m, the maximum vertical displacement is 3.5m; the macro-epicenter is in Sanchakou.

Key words: the East Kunlun active fault zone, the Ms7.5 Tuosuohu Lake earthquake in 1937, the earthquake surface rupture zone, Macro-epicenter

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