【摘要】 阜康-吉木萨尔断层是博格达山体与山前冲洪积平原的分界断层,全新世以来仍在活动,山前的冲洪积平原和河流低级阶地均发生了不同程度的拱曲变形,断层剖面揭示了该断层晚更新世末期有3次古地震事件。断层近地表后倾角变缓,地表的陡坎地形主要是由地层的拱曲变形形成的,反映了断层近地表位错的消减和分配规律。更多还原

【Abstract】 The Fukang-Jimsar fault, a Holocene active fault, is considered as a borderline fault between Bogeda Mountainand piedmontalluvial-pluvial fans. Piedmont alluvial-pluvial fans and low terraces of rivers were bended in different degrees since the middle and late Holocene. The fault cross-section near Dalongkou indicates there were three paleoseismic events during late Pleistocene, and the recurrence interval of earthquake on the east segment of the fault is 4500～7500 a. The obliquity of the Fukang-Jimsar fault inclination decreased when it reached the ground, and scarps on the surface were formed by the bending strata. The section reveals the ways of displacemental diminishmentand deformation distributionnear the ground.更多还原