Recent Tectonic Activity of Bayankala Fault-Block and the Kunlun-Wenchuan Earthquake Series of the Tibetan Plateau
详细信息
- 责任者：Deng Qidong (National Center for Active Fault Studies ; Institute of Geology ; China Earthquake Administration ; Beijing 100029 ; China) ; Gao Xiang
- 刊名：Earth Science Frontiers
- 出版年：2010
- 卷期：17(5)
- 关键词：块断运动 ; block-fault movement ; 大震 ; great earthquakes ; 青藏高原 ; Qinghai-Tibetan Plateau
- 页码：p.163-178
- 图表：9 illus., 1 table, 41 refs.
- 分类号：0500
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
The Tibetan Plateau is a major region of earthquake activity in China. Five major earthquakes occurred in the Tibetan Plateau during the last decade. All of them occurred around the boundaries of the Bayankala fault-block of the Tibetan fault-block region and represented most recent activity of the block. The kinematics of these events suggest the southeastward movement of the Bayankala fault-block. Major regional seismicity in the Tibetan fault-block region and the Bayankala fault-block has shown the multi-period activities and migration from one region to another since 1900. The pattern of seismic activity and fault-block motions in the Tibetan fault-block region and the Bayankala fault-block may relate to the compression and penetration of the Australia-Indian plate into the Eurasian plate. Thus, the earthquake activity in the Tibetan Plateau and in the Bayankala fault-block may also relate to strong earthquake activity in Sumatra along the boundary of the Australia-Indian plate. Because great earthquakes are still occurring in the Sumatra region, great attention should be paid to the great earthquake risks in the Bayankala fault-block and the southern part of the Tibetan Plateau.