摘要
塔城盆地在大地构造上,位于哈萨克斯坦—准噶尔板块内,是西准噶尔山地的一山间盆地。在盆地周边及邻近地区主要分布有塔克台断裂、冬格列克断裂、裕民南断裂、巴尔鲁克山东缘断裂等。这些断裂在晚第四纪以来发生过显著的活动,断错了山前洪积扇和河流阶地及河漫滩,并形成连续分布的地表错动形变带。形变带主要由断层陡坎、断塞塘、挤压鼓包、沟槽等组成。经调查研究,形变带为古地震形变带。通过野外实地调查和大型探槽开挖及光释光年代测定,断裂在晚更新世或全新世时期发生过新活动及古地震。
Tacheng basin was located in Kazakhstan-Junggar plate in West Junggar mountain. Taket- ai fault , Donggelieke fault , southern Yumin fault and eastern Baerluke fault were distributed a- round Tacheng basin. These faults had significant activities in Late Quaternary, thus piedmont allu- vial fan, fluvial terraces, floodplains, and continuous dislocation deformation zone surface formed. Deformation zone is mainly composed of fault scarp, sag ponds, extrusion bulging, trench. After in- vestigation, deformation band was paleoearthquake deformation belt. Stimulated by field investiga- tion, large trench excavation and thermoluminescence（TL） quake occurred in the epipleistocene or holocene. dating , fault activity and ancient earth-
出处
《内陆地震》
2015年第3期195-202,共8页
Inland Earthquake
关键词
塔城盆地
晚第四纪
活动断裂
古地震形变带
Tacheng basin
Late Quaternary
Active fault
Paleoearthquake deformation belt
