Abstract Scaled analogue modelling using non-linear viscous plasticine as rock analogue has been carried out to investigate the influence of varying layer obliquity on the geometry of single-layer folds and boudins under bulk coaxial plane strain. Two deformation series with different viscosity ratio between layer and matrix (m = 18 and 82) were carried out. The initial angle between shortening axis and competent layer (θZ(i)) was gradually changed from 0° to 90° by multiples of 11.25°. Shortening at θZ(i) 60°. Because of the high finite strain and related layer rotation, these boudins are not asymmetric (as expected) but symmetric. Folds and boudins like those produced in the present study occur in salt rocks and in crystalline basement deformed at deeper structural levels.

中文翻译：

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同轴平面应变下斜单层的 Boudinage 和两阶段折叠：层绕轴旋转不变 (Y)

摘要 使用非线性粘性橡皮泥作为岩石模拟物进行了比例模拟建模，以研究不同层倾斜度对体同轴平面应变下单层褶皱和布丁几何形状的影响。进行了层与基体之间具有不同粘度比（m = 18和82）的两个变形系列。缩短轴和主管层之间的初始角度 (θZ(i)) 从 0° 逐渐变为 90° 11.25° 的倍数。在 θZ(i) 60° 处缩短。由于高有限应变和相关层旋转，这些布丁不是不对称的（如预期的那样）而是对称的。在本研究中产生的褶皱和布丁发生在盐岩和在更深结构水平变形的结晶基底中。