地质论评2011，Vol.57Issue(6)：761-769,9.
新疆西南天山下侏罗统软沉积物变形研究
On the Lower Jurassic Soft-sediment Deformation of Southwestern Tianshan Mountains, Xinjiang, China
摘要
Abstract
Early Jurassic soft-sediment deformation occuring within lacustrine sandstone is distributed mainly in the Wuqia region, SW Tianshan Mountains, Xinjiang. Triggered by earthquakes, soft-sediment deformation was found to occur in three layers of the Lower Jurassic Kangsu Formation. The main styles of deformation structures contain load cast, ball-and-pillow, droplet, cusps, homogeneous layer, and liquefied unconformity. Three deformation layers reflect that the Wuqia region had undergone three strong earthquakes at the end of Early Jurassic. The differences of deformation mechanisms may represent varying magnitudes of earthquakes. During the Late Jurassic, the Wuqia area was located at the pull-apart basin controlled by significant Talas-Ferghana strike-slip fault in central Asia, accompanied by the soft-sediment deformation induced by the earthquakes. It is suggested in this paper that the magnitudes of the paleoseisms may range from 6.5 to 7.关键词
塔拉斯—费尔干纳断裂/负载/滴状体/液化均一层/液化不整合/早侏罗世Key words
load cast/droplet/homogeneous layer/liquefied unconformity/Talas-Ferghana fault/Early Jurassic引用本文复制引用
乔秀夫,郭宪璞..新疆西南天山下侏罗统软沉积物变形研究[J].地质论评,2011,57(6):761-769,9.基金项目
本文为中国石化股份有限公司“塔里木盆地构造背景、盆山动力学与油气前景”项目(编号YPH08110)的成果. （编号YPH08110）
