Modelling of non-cylindrical boudins

非圆柱形布丁的建模

• 批准号: 117390592
• 负责人: Professor Dr. Gernold Zulauf
• 金额: --
• 依托单位: Arbeitsgruppe Strukturgeologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/117390592?language=en
• 关键词: Modelling; non; cylindrical; boudins

Noncylindrical boudins are common deformation structures in naturally deformed rocks which can develop by different processes. These processes have been hardly investigated experimentally. In the present study we will carry out scaled single-phase and polyphase experiments using natural rocks (anhydrite layer in halite matrix) and rock analogues (plasticine) to produce non-cylindrical torn and drawn boudins, which result from brittle fracture and viscous necking, respectively. Incremental runs in combination with computer-tomographic analyses will demonstrate the growth of non-cylindrical boudins through space and time. The aim of the experiments is to constrain geometrical parameters which are inherent in distinct types of non-cylindrical boudins and can be used to identify such structures in nature. As the geometry of boudins is controlled by the rheological behavior of matrix and layer, the geometrical parameters can be used as a paleoviscometer. The new results will be of interest to structural geologists worldwide, the more so as boudinage in rocks could be important for the formation of ore deposits, the migration of oil and gas, and the deposition of nuclear waste in salt domes.

非圆柱形布丁是自然变形岩石中常见的变形结构，可以通过不同的过程形成。这些过程几乎没有经过实验研究。在本研究中，我们将使用天然岩石（石盐基质中的硬石膏层）和岩石类似物（橡皮泥）进行规模化的单相和多相实验，以生产由脆性断裂和粘性颈缩产生的非圆柱形撕裂和拉拔布丁，分别。增量运行与计算机断层扫描分析相结合将证明非圆柱形布丁在空间和时间上的生长。实验的目的是约束不同类型的非圆柱形布丁固有的几何参数，并可用于识别自然界中的此类结构。由于布丹的几何形状受基质和层的流变行为控制，因此几何参数可以用作古粘度计。新的结果将引起全世界的构造地质学家的兴趣，尤其是岩石中的布丁格对于矿床的形成、石油和天然气的迁移以及盐丘中核废料的沉积可能很重要。

项目成果

Tablet boudinage of an anhydrite layer in rock-salt matrix: Results from thermomechanical experiments

• DOI: 10.1016/j.jsg.2011.09.006
• 发表时间: 2011-12
• 期刊: Journal of Structural Geology
• 影响因子: 3.1
• 作者: J. Zulauf;G. Zulauf;J. Hammer;F. Zanella

Formation of chocolate-tablet boudins in a foreland fold and thrust belt: A case study from the external Variscides (Almograve, Portugal)

• DOI: 10.1016/j.jsg.2011.08.009
• 发表时间: 2011-11
• 期刊: Journal of Structural Geology
• 影响因子: 3.1
• 作者: G. Zulauf;G. Gutiérrez-Alonso;R. Kraus;R. Petschick;S. Potel

The origin of tablet boudinage: Results from experiments using power–law rock analogs

布丁格片的起源：使用 powerâlaw 岩石类似物进行实验的结果

• DOI: 10.1016/j.tecto.2011.07.013
• 发表时间: 2011
• 期刊: Tectonophysics
• 影响因子: 2.9
• 作者: Zulauf;Zulauf;Gutiérrez-Alonso
• 通讯作者: Gutiérrez-Alonso