From parasitic via non-cylindrical to extension-parallel folding of oblique single layers under coaxial plane strain: Layer rotation around the shortening axis (Z)
From parasitic via non-cylindrical to extension-parallel folding of oblique single layers under coaxial plane strain: Layer rotation around the shortening axis (Z)
复制标题
同轴平面应变下从非圆柱形寄生折叠到倾斜单层的延伸平行折叠：绕短轴（Z）的层旋转
DOI：
10.1016/j.jsg.2021.104303
复制
发表时间：
2021
影响因子：
3.1
通讯作者：
Hattingen
中科院分区：
文献类型：
--
作者：
Zulauf;Zulauf;Hattingen
我们给出了比例模拟模拟的结果，结果表明，变化的单层倾角对高同轴面应变(Ez=1−70%)产生的褶皱几何形状的影响。通过围绕缩短轴(Z)旋转适配层和拉伸轴(X)之间的初始角度(θX(I))来递增地改变该层。模拟材料由非线性粘性塑性材料组成，通过位错蠕变模拟变形。实验在不同的层和基质粘度比下进行，其中一次循环聚焦于增量应变，倾斜单层的变形诱导旋转速度与相应的被动平面的旋转速度相似。随着初始层倾角的增加(θX(I))，展开褶皱的轴线从X方向向它们方向旋转，导致伸展平行、非圆柱形(周向)和寄生褶皱；在θX(I)=约60°时，层平行伸长减小到零，沿Z轴的缩短逐渐被屈曲所调节。褶皱幅度随地层倾斜度的增加而增大。首次描述了单斜层在大体积同轴面应变作用下的非圆柱形折叠。与伸展平行褶皱不同，它们的形状受层与基质之间的粘度比的影响很大。
We present results of scaled analogue modelling, which show the influence of varying single-layer inclination on the geometry of folds produced by high coaxial plane strain (eZ= −70%). The initial angle (θX(i)) between the competent layer and the stretching axis (X) was incrementally changed by rotating the layer around the shortening axis (Z). The analogue material consists of non-linear viscous plasticine, which simulates deformation by dislocation creep. The experiments were carried out at various viscosity ratios between layer and matrix, and one run focused on incremental strain.Deformation-induced rotation of the oblique single layers was similar fast to that of a corresponding passive plane. With increasing initial layer inclination (θX(i)) the axes of developing folds rotate from theX-to theY-direction resulting in extension-parallel, non-cylindrical (periclinal) and parasitic folds; the layer-parallel elongation decreased to zero atθX(i)= ca. 60°, and shortening along theZ-axis was progressively accommodated by buckling. The amplitude of folds increased with the degree of layer inclination. Non-cylindrical folding of single oblique layers under bulk coaxial plane strain is described for the first time. In contrast to extension-parallel folds, their shape is significantly affected by the viscosity ratio between layer and matrix.
登录
查看更多内容
3D 有限振幅折叠：地壳和岩石圈变形过程中应力演化的影响
DOI：
--
发表时间：
2006
期刊：
影响因子：
--
作者：
B. Kaus;S. Schmalholz
通讯作者：
S. Schmalholz
褶皱和应变椭球体：通用模型
DOI：
--
发表时间：
1981
期刊：
影响因子：
--
作者：
J. Treagus;S. Treagus
通讯作者：
S. Treagus
粘弹性寄生折叠：对最终孔隙率分布的影响
DOI：
--
发表时间：
2020
期刊：
影响因子：
--
作者：
Xiaolong Liu;A. Eckert;P. Connolly;D. Thornton
通讯作者：
D. Thornton
前陆折叠
DOI：
--
发表时间：
1952
期刊：
Quarterly Journal of the Geological Society of London
影响因子：
--
作者：
G. M. Lees
通讯作者：
G. M. Lees
与强制折叠和屈曲折叠相关的几何形状、空间组织和断裂模式的比较
DOI：
--
发表时间：
1999
期刊：
Geological Society Special Publication
影响因子：
--
作者：
John W. Cosgrove;M. Ameen
通讯作者：
M. Ameen