Unknown
PANGAEA
In:
Supplement to: Kettermann, Michael; von Hagke, Christoph; van Gent, Heijn W; Grützner, Christoph; Urai, Janos L (2016): Dilatant normal faulting in jointed cohesive rocks: a physical model study. Solid Earth, 7(3), 843-856, https://doi.org/10.5194/se-7-843-2016
Publication Date:
2024-01-27
Description:
Dilatant faults often form in rocks containing pre-existing joints, but the effects of joints on fault segment linkage and fracture connectivity is not well understood. We present an analogue modeling study using cohesive powder with pre-formed joint sets in the upper layer, varying the angle between joints and a rigid basement fault. We analyze interpreted map-view photographs at maximum displacement for damage zone width, number of connected joints, number of secondary fractures, degree of segmentation and area fraction of massively dilatant fractures. Particle imaging velocimetry helps provide insights on deformation history of the experiments and illustrate the localization pattern of fault segments. Results show that with increasing angle between joint-set and basement-fault strike the number of secondary fractures and the number of connected joints increases, while the area fraction of massively dilatant fractures shows only a minor increase. Models without pre-existing joints show far lower area fractions of massively dilatant fractures while forming distinctly more secondary fractures.
Keywords:
Angle; Description; File name; File size; Uniform resource locator/link to movie; View
Type:
Dataset
Format:
text/tab-separated-values, 126 data points
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