摘要
受近南北向挤压应力作用的影响,新疆北天山地震带东段博格达山北缘发育多条晚第四纪活断裂,呈向北凸起的弧形,构成了博格达推覆体。这些晚第四纪活断裂现今活动方式继承了新构造运动以来的活动特点,博格达山由南向北继续推覆,在其北缘于1934年8月7日及1965年11月13日分别发生了6.0、6.6级地震。目前该处地震活动处于相对平静状态,未来存在发生6级地震的潜在危险。
With the action of NS compressional stress, there exists lots of the late Quaternary active faults on the northern verge of Bogurda mountain of the eastern section of northern Tienshan seismic belt, which is arc- thrust block. Modern motion mode shaped and projects in the N direction, and forms Bogurda of these late Quaternary active faults succeeds to activity character since neotectonic motion, Bogurda mountain continues to thrust from south to north, and there occurred Ms 6.0 earthquake on Aug. 7,1934, and Ms 6.6 earthquake on Nov. 13,1965 on its northem verge. Now seismicity is relatively quiescent, and there occurs Ms 6 earthquake txassibly in the future.
出处
《内陆地震》
2006年第2期109-114,共6页
Inland Earthquake
关键词
新疆
博格达山
现今构造运动
活断裂
地震活动
Xinjiang
Bogurda mountain
modern tectonic motion
active fault
seismicity
