塔里木盆地东南隆起演化及构造特征分析

塔东南地区经历六次大地构造运动改造和四个盆地演化阶段后,其中缺失下古生界及部分中生界,并形成东西向的三凸两凹五个二级构造单元。东南隆起侏罗系断陷盆地从底部的冲积物到湖泥沉积段,总体显示向上变细的特征反映为水进体系。最终形成了侏罗纪不对称的断陷盆地体系。包括断陷期、断坳期和坳陷期三个阶段。构造样式东西存在差异。民丰凹陷具有坳陷型湖盆特征;若羌凹陷为典型的箕状断陷沉积,发育两期断陷,一期断陷为断陷特征,二期断陷为断坳特征。二期断陷对一期断陷具明显的破坏和改造作用,具有继承性,两期中心略有迁移。

Tectonic Evolution of Uplift in Southeast Tarim Basin and Analysis of Their Structural Features

Due to undergoing the multi-stage modification,including six tectonic movement and four basin evolution,the southeastern Tarim basin lacks all of the lower Paleozoic stata and part of Mesozoic strata.It formed five secondary structural units composed of three convex and two concave from east to west.The natures from the alluvial deposits at the bottom to the lake mud deposition in the Jurassic rift basin of southeast uplift,shows transgressive systems tract.Finally,it formed the Jurassic asymmetric rift bas...