汉江丹江口水库地震ht
ON THE HANJIANG-DANJIANGKOU RESERVOIR EARTHQUAKES
-
摘要: 汉江丹江口水库由汉江、丹江两个库段组成.在丹库的峡谷灰岩地带,断裂、节理发育,利于水的渗透和循环.1967年11月蓄水后,随水位的变化,地震活动增加,几年来由 Mss=4.7,并在丹库的峡谷附近形成北北西方向延伸的三个地震密集区.地震频度、强度与水位(库容)变化有一定的相关性.蓄水后地壳形变明显,并讨论了形变应力分布特征及诱发机制.Abstract: The Hanjiang-Danjiangkou Keservoir is composed of two parts, the Dan River and Han River Reservoirs. In the gorge district of the Dan River Reservoir, the limestone area consists of well-developed faults and joints, favourable to the permeation and circulation of water.After impounding of water in November 1967, seismicity increased with the changes of water level. The earthquake magnitude of the past few years rose from Mss=4.7 and three earth-quake clustered areas, elongating in the NNW direction were formed near the gorge district of the Dan River Reservoir. Earthquake frequency and intensity correlate to certain extent with the change of water level in the reservoirs.Obvious crustal deformation was observed after filling up of the reservoirs. Distribution of the stress field causing the deformation and the mechanism of earthquake inducing are discussed.
-
-
[1] 李四光,地质力学概论,科学出版社,41, 1973.
[2] N. I. Nikolaev, Tectonic conditions favourable for cauaing earthquakes occurring in connection with reservoir filling, Engineeering Geology, B, 171——189, 1974.
[3] D. I. Dough, W. I. Dough, Load induces earthquakes at lake kariba——II geophys., J. R. Astr. Soc.21. 79——101.1970.
[4] 王妙月等,新丰江水库地震的震源机制及其成因初步探讨,中国科学,1, 85——97, 1976.
[5] 沈崇刚等,新丰江水库地震及其对大坝的影响,中国科学,2, 187——205, 1974.
[6] A. Ryall, W. A. Peppin and J. D. Vanwormer, Field——Seiamic investigation of the August 1975 oroville California, earthquake sequence, Engineering Geology, 10, 353——369. 1976.[1] 李四光,地质力学概论,科学出版社,41, 1973.
[2] N. I. Nikolaev, Tectonic conditions favourable for cauaing earthquakes occurring in connection with reservoir filling, Engineeering Geology, B, 171——189, 1974.
[3] D. I. Dough, W. I. Dough, Load induces earthquakes at lake kariba——II geophys., J. R. Astr. Soc.21. 79——101.1970.
[4] 王妙月等,新丰江水库地震的震源机制及其成因初步探讨,中国科学,1, 85——97, 1976.
[5] 沈崇刚等,新丰江水库地震及其对大坝的影响,中国科学,2, 187——205, 1974.
[6] A. Ryall, W. A. Peppin and J. D. Vanwormer, Field——Seiamic investigation of the August 1975 oroville California, earthquake sequence, Engineering Geology, 10, 353——369. 1976.
计量
- 文章访问数: 1039
- HTML全文浏览量: 30
- PDF下载量: 127
下载:
