Abstract: The Dongzhuang structure in the Nanxiang Basin,Henan anti Hubei Provinces,is an anticline associated with aft asymmetric erestal graben. Growth faults at the southeastern edge of the graben dip more gently than those at the northwestern edge. The Dongzhuang structure is hounded to the south by the Xinye-Quwa fault zone which marks the southwestern hnnndarv of the Nanyang sub-basin within the Nanxiang basin.

摘要： 河南南襄盆地南阳凹陷东庄构造,是一个在拉张作用下形成的滚卷背斜构造,其背斜一拱顶地堑构造,是新野一曲洼断裂之上盘沉积岩层沿断裂面下滑形变造成的。滚卷构造的活动,导致不对称扇形断裂地堑的发育及盆地第三纪沉积中心的迁移。本文用重力滑移及滚卷褶皱二组尺度模型,对东庄构造的成因作了初步探讨。实验用于石英砂模拟脆性沉积岩层;用一种具牛顿流变特性的聚合硅树脂模拟塑流层或滑脱层;实验结果强调了东庄构造的滚卷成因机制。

关键词: 河南, 东庄, 滚卷背斜, 拱顶地堑, 动力尺度模拟, 重力滑移, 构造地质学