The Fault’s Slip Rate Results in the Mid-Southern Section of the North-South Seismic Belt Calculated from the Block Theory
详细信息
- 责任者：Yan Wei (China Earthquake Networks Center ; Beijing 100045 ; China) ; Wu Yanqiang
- 刊名：Earthquake Research in China
- 出版年：2013
- 卷期：29(1)
- 关键词：地震带 ; seismic belts ; 滑移速率 ; slip rates ; 南北地震带 ; North-South Seismic Belt
- 页码：p.81-90
- 图表：illus., 2 tables, 37 refs.
- 分类号：0300
- issnNo：ISSN1001-4683
- isbnNo：CN11-2008/P
摘要
In this paper, using the 1999～2007 GPS velocity field data and choosing the block model, we researched the applicability of each block and gave the slip rate of each block boundary. The results show that the Baoxing-Wenchuan compression rate in the Longmenshan fault zone is smaller, about 0.5～1.8mm·a-1; the Wenchuan-Maoxian pressure rate is relatively obvious, at 1.8～3.8mm·a-1; the Xianshuihe fault belt tension pressure rate and slip rate has some spatial difference characteristics: the slip rate of north of Luhuo region (8.1mm·a-1) is bigger than the sinistral strike-slip rate (4.8mm·a-1); Luhuo-Dawu paragraph pressure characteristics and slip rate is basically the same; Dawu-Kangding section presents a decrease of the strike-slip rate, but there is a trend of rate increase; the Kangding-Shimian segment showed strike-slip nature; the Xiaojiang fault slip rate is significantly greater than pressure rate; the Red River fault zone spatial segmentation is more obvious: north west slip amount is smaller, but there are some tension pressure components (4.7mm·a-1 at Jingdong). The rate at south-east paragraph (west to Gejiu) is basically of strike-slip type (4.5mm·a-1).
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