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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。
The Dongzhuang structure of the Nanyang depression in the Nanxiang Basin, Henan Province is a rolling anticline structure formed under tension. Its anticline-dome graben structure is the result of the sedimentary rock layers of the upper plate and the lower plate of the Quya depression of the Xinye depression sliding along the fracture surface Caused by deformation The activity of the rolling structure leads to the development of the asymmetrical fan-shaped graben and the migration of the Tertiary sedimentary center in the basin. In this paper, two sets of scale models of gravity slip and roll fold are used to discuss the origin of Dongzhuang structure. Experiments were performed on quartz sand to simulate the brittle sedimentary rock formation. A new type of polymerized silicone resin with Newtonian rheology was used to simulate the plastic flow or detachment. The experimental results emphasize the rolling mechanism of the Dongzhuang structure.