MDF: The structure and evolution of near-surface massively dilatant faults

MDF：近地表大规模膨胀断层的结构和演化

• 批准号: 316167043
• 负责人: Professor Dr. Klaus Reicherter, since 9/2019
• 金额: --
• 依托单位: Fachbereich Geographie und Geologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/316167043?language=en
• 关键词: MDF; structure; evolution; near; surface

Close to the Earth's surface, cohesive rocks fail in extension, and normal faults in these rocks are commonly massively dilatant. Although near surface massively dilatant faults are common, their internal structure is poorly known, which makes structural and fluid flow predictions notoriously difficult. In an integrated project of scaled sandbox experiments, fieldwork and geomechanical modeling, we will study near surface massively dilatant faults (MDF), to better predict their subsurface structure and understand their evolution. In a parameter study using analogue modeling, the main geometric and mechanical controls on MDF will be quantified, and results compared with high-resolution morphometric measurements of the surface expression of MDF; firstly on an exposed mid ocean ridge, and then in sandstones with pre-existing joints. Comparison of our experiments with the field data and calibration against numerical models will allow predicting their inaccessible internal structure at depth. We will also address the influence of deformation rate and its relation to the shape, size, structure and formation of MDF.

靠近地球表面，粘性岩石无法延伸，这些岩石中的正断层通常是大规模膨胀的。尽管近地表大规模膨胀断层很常见，但对其内部结构知之甚少，这使得结构和流体流动预测变得非常困难。在规模化沙箱实验、现场工作和地质力学建模的综合项目中，我们将研究近地表大规模膨胀断层（MDF），以更好地预测其地下结构并了解其演化。在使用模拟建模的参数研究中，对 MDF 的主要几何和机械控制将进行量化，并将结果与​​ MDF 表面表达的高分辨率形态测量进行比较；首先是在暴露的大洋中脊上，然后是在已经存在节理的砂岩上。我们的实验与现场数据的比较以及与数值模型的校准将允许预测其难以接近的深度内部结构。我们还将讨论变形率的影响及其与中密度纤维板的形状、尺寸、结构和形成的关系。

项目成果

Editorial: Cutting-Edge Analogue Modeling Techniques Applied to Study Earth Systems

社论：尖端模拟建模技术应用于研究地球系统

• DOI: 10.3389/feart.2019.00265
• 发表时间: 2019
• 期刊: Frontiers in Earth Science
• 影响因子: 2.9
• 作者: von Hagke;Philippon
• 通讯作者: Philippon

The joint sets on the Lilstock Benches, UK. Observations based on mapping a full resolution UAV-based image

英国利尔斯托克长凳上的联合观测基于绘制全分辨率无人机图像

• DOI: 10.1016/j.jsg.2021.104332
• 发表时间: 2021
• 期刊: Journal of Structural Geology
• 影响因子: 3.1
• 作者: Passchier;Passchier;Weismüller
• 通讯作者: Weismüller

The Effect of Obliquity of Slip in Normal Faults on Distribution of Open Fractures

正断层滑移倾角对张开裂缝分布的影响

• DOI: 10.3389/feart.2019.00018
• 发表时间: 2019
• 期刊: Frontiers in Earth Science
• 影响因子: 2.9
• 作者: von Hagke;Kettermann;Bitsch;Bücken;Weismüller
• 通讯作者: Weismüller

Mapping the fracture network in the Lilstock pavement, Bristol Channel, UK: manual versus automatic

绘制英国布里斯托海峡利尔斯托克路面的裂缝网络图：手动与自动

• DOI: 10.5194/se-2020-67
• 发表时间: 2020
• 期刊: Solid Earth
• 影响因子: 3.4
• 作者: Weismüller;Prabhakaran;Passchier;Bertotti;Reicherter
• 通讯作者: Reicherter

Large near-surface block rotations at normal faults of the Iceland rift: Evolution of tectonic caves and dilatancy

冰岛裂谷正断层处的大型近地块旋转：构造洞穴和剪胀的演化

• DOI: 10.1130/g46158.1
• 发表时间: 2019
• 期刊: Geology
• 影响因子: 5.8
• 作者: Kettermann;Weismüller;von Hagke;Reicherter
• 通讯作者: Reicherter