A database of enhanced-gravity analogue models examining the influence of pre-existing fabrics on the evolution of oblique rift

This dataset shows the original data of a series of enhanced-gravity (centrifuge) analogue models, which were performed to test the influence of the pre-existing fabrics in the brittle upper crust on the evolution of structures resulting from oblique rifting. The obliquity of the rift (i.e., the angle between the rift axis and the direction of extension) was kept constant at 30° in all the models. The main variable of this experimental series was the orientation of the pre-existing fabrics (indicated as the angle between the trend of the fabric and the orthogonal to extension), which varied from 0° to 90° (i.e., from orthogonal to parallel to the extension direction). The inherited discontinuities were reproduced by cutting with a knife through the top brittle layer of models. An overview of the experimental series is shown in Table 1. In this dataset, four different data types are provided for further analysis: 1) Top-view photos of model deformation, taken at different time intervals and showing the deformation process of each model; they can be used to interpret the geometrical characteristics of rift-related faults; 2) Digital Elevation Models (DEMs) used to reconstruct the 3D deformation of the analogue models, allowing for quantitative analysis of the fault pattern. 3) Movies of model deformation, built from top-view photos, which help to visualize the evolution of model deformation; 4) Faults line-drawings to be used for statistical quantification of rift-related structures. Further information on the modelling strategy and setup can be found in the publication associated to this dataset and in Corti (2012), Philippon et al. (2015), Maestrelli et al. (2020), Molnar et al. (2020), Zwaan et al. (2021), Zou et al. (2023). Materials used to perform these enhanced-gravity analogue models were described in Montanari et al. (2017), Del Ventisette et al. (2019) and Zwaan et al. (2020).

本数据集收录了一系列增强重力（离心）相似模拟实验的原始数据，旨在探究脆性上地壳中预先存在的组构对斜向裂谷作用所形成构造的演化的影响。所有实验中，裂谷斜度（即裂谷轴与伸展方向的夹角）均恒定为30°。本系列实验的核心变量为预先存在组构的取向（以组构走向与伸展正交方向的夹角表示），取值范围为0°至90°，对应从与伸展方向正交到平行的组构。通过在模型顶部脆性层上用刀具刻切，复现继承性不连续面。本系列实验的概况见表1。

本数据集提供四类数据以供后续分析：
1. 模型变形顶视照片：于不同时间间隔拍摄，展示各模型的变形过程，可用于解析与裂谷相关断层的几何特征；
2. 数字高程模型（Digital Elevation Model, DEMs）：用于重建相似模拟实验的三维变形，支持断层样式的定量分析；
3. 模型变形动画：由顶视照片制作而成，可直观呈现模型变形的演化过程；
4. 断层线描图：用于对裂谷相关构造开展统计量化分析。

关于模拟策略与实验设置的更多细节，可参见本数据集关联的发表文献，以及Corti (2012)、Philippon et al. (2015)、Maestrelli et al. (2020)、Molnar et al. (2020)、Zwaan et al. (2021)、Zou et al. (2023)。本系列增强重力相似模拟实验所用材料的相关说明，可参阅Montanari et al. (2017)、Del Ventisette et al. (2019)及Zwaan et al. (2020)。