Abstract Permian limestones of the Saraburi Group in Central Thailand, deformed during the Triassic Indosinian orogeny, exhibit detachments formed in response to the following variations in lithology: thin shale beds within a limestone sequence, massive limestone overlaying well-bedded limestone, massive limestone overlying interbedded limestones and shales, within well-bedded limestones, thin shales interbedded with limestones overlying limestones. Where shales are present the decoupling of layers is similar to examples previously described in the literature from outcrop and analogue models. However, more unusually, detachments are also present within limestone units. While detachment folds are typically developed above a basal weak unit (usually salt or shale), in the study area is an example developed entirely within well-bedded limestones. Instead of flow of the weak unit into the core of the fold, room problems in the core of the fold are accommodated by pressure solution parallel to bedding, thrusts, small fault propagation folds, and intense folding. Variations in structural style are largely influenced by the spacing/intensity of bedding, limestone clay content (and the efficiency of pressure solution during deformation), and the presence/absence and thickness of interbedded shales. A ductile detachment zone is developed between well-bedded limestones and overlying massive limestones, the detachment zone separates highly folded sequence dominated by steep dips, from a weakly folded sequence dominated by gentle dips. Pressure solution processes, and variability in pressure solution intensity (related to clay content) play a very strong role in accommodating the difference in deformation styles across the detachment.

中文翻译：

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泰国 Saraburi 群、三叠系 Khao Khwang 褶皱和逆冲带的碳酸盐岩中的次生拆离

摘要 泰国中部沙拉武里群二叠纪石灰岩在三叠纪印支造山运动期间变形，表现出响应以下岩性变化而形成的拆离：石灰岩层序内的薄页岩层，块状石灰岩覆盖良好层状石灰岩，块状石灰岩上覆互层石灰岩和页岩，在层状良好的石灰岩中，薄页岩与覆盖在石灰岩上的石灰岩互层。在存在页岩的情况下，层的解耦类似于先前在文献中从露头和模拟模型中描述的示例。然而，更不寻常的是，石灰岩单元中也存在分离。虽然拆离褶皱通常在基底薄弱单元（通常是盐或页岩）上方发育，但在研究区有一个完全发育在层状良好的石灰岩内的例子。不是弱单元流入褶皱核心，褶皱核心的空间问题通过平行于层理、逆冲断层、小断层传播褶皱和强烈褶皱的压力解来解决。构造样式的变化在很大程度上受层理的间距/强度、石灰岩粘土含量（以及变形过程中压力溶解的效率）以及互层页岩的存在/不存在和厚度的影响。层状发育良好的灰岩与上覆块状灰岩之间发育韧性拆离带，该拆离带将陡倾角为主的高度褶皱层序与缓倾角为主的弱褶皱层序分开。压力解决过程，