Influence of erosion and sedimentation on strike-slip fault systems: insights from analogue models

Guerroué, Erwan Le; Cobbold, P.R.

doi:10.1016/j.jsg.2005.11.007

Cited by 50 publications

(30 citation statements)

References 27 publications

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“…In contrast to the commonly used analytic and numerical geodetic models, laboratory models can simulate the complex dynamics of magma emplacement and fault mechanics and the resulting surface deformation [e.g., Le Guerroué and Cobbold , ; Galland et al ., ; Abdelmalak et al ., ; Galland , ]. In addition, the internal structures in the laboratory models can be directly observed, and they exhibit complex, geologically relevant shapes [ Galland et al ., ].…”

Section: Discussionmentioning

confidence: 99%

“…The amount of slip along the basal cut did not exceed 40 cm. The sand layer in our experiment was 8 cm thick; therefore, the lateral boundaries had little effect on deformation [see, e.g., Le Guerroué and Cobbold, 2006]. Models were constructed by pouring sand into the box and leveling the surface until horizontal.…”

Section: Tectonic Deformation 421 Experimental Setupmentioning

confidence: 99%

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Application of open‐source photogrammetric software MicMac for monitoring surface deformation in laboratory models

et al. 2016

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Quantifying deformation is essential in modern laboratory models of geological systems. This paper presents a new laboratory monitoring method through the implementation of the open‐source software MicMac, which efficiently implements photogrammetry in Structure‐from‐Motion algorithms. Critical evaluation is provided using results from two example laboratory geodesy scenarios: magma emplacement and strike‐slip faulting. MicMac automatically processes images from synchronized cameras to compute time series of digital elevation models (DEMs) and orthorectified images of model surfaces. MicMac also implements digital image correlation to produce high‐resolution displacements maps. The resolution of DEMs and displacement maps corresponds to the pixel size of the processed images. Using 24 MP cameras, the precision of DEMs and displacements is ~0.05 mm on a 40 × 40 cm surface. Processing displacement maps with Matlab® scripts allows automatic fracture mapping on the monitored surfaces. MicMac also offers the possibility to integrate 3‐D models of excavated structures with the corresponding surface deformation data. The high resolution and high precision of MicMac results and the ability to generate virtual 3‐D models of complex structures make it a very promising tool for quantitative monitoring in laboratory models of geological systems.

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Section: Discussionmentioning

confidence: 99%

Section: Tectonic Deformation 421 Experimental Setupmentioning

confidence: 99%

Application of open‐source photogrammetric software MicMac for monitoring surface deformation in laboratory models

et al. 2016

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“…strike-slip faults. The physical experiments ofGuerroue & Cobbold (2006) confirm that pop-up structures and antiform structures are kinematically linked with strike-slip deformation in transpresssional tectonic settings.…”

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confidence: 68%

Deformation partitioning in a transtension-dominated tectonic environment: the illustrative kinematic patterns of the Neogene–Quaternary Ptolemais Basin (northern Greece)

Diamantopoulos

Krohe

Dimitrakopoulos

2013

JGS

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The structure of the Neogene-Quaternary Ptolemais sedimentary basin exemplifies the importance of deformation partitioning in the kinematic history of basin formation. Structural analyses were carried out at outcrop from the metre to kilometre scale on basin marginal faults, and on structures reflecting deformation of the interior of the basin. Deformation is partitioned into three spatially separated, but kinematically linked domains. Two transtensional-dominated domains in the northern and in the southern parts are separated by a transpressional-dominated domain in the central part of the basin. Intense synsedimentary deformation of Pliocene-Quaternary deposits occurred in all three domains. Dominant structures that affected pre-Neogene lithologies and the basin-fill include (E)NE-(W)SW-and NW-SE-trending basin kilometre-scale marginal faults. We propose that the structures of the three domains were active simultaneously during progressive deformation reflecting an overall transtensional-dominated regime. The deformation is imposed by boundary conditions and is consistent with the Pliocene-Quaternary large-scale deformation in northern Greece that includes clockwise (dextral) rotations of crustal blocks and gravity-driven NNW-SSE extension. Strong partitioning of deformation produced contrasting structures, which do not reflect a sequence of events related to a regional stress fields that changed with time.

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“…Several authors have used similar deformation rigs to simulate strike-slip structures and have obtained homogenous deformation in purely brittle (e.g., Guerroué and Cobbold 2006) and ductilebrittle models (e.g., Richard et al 1991, Casas et al 2001). In our experiments, the movement of one half of the experimental box caused the silicone flow and rotation of the CE.…”

Section: Discussionmentioning

confidence: 99%

Analog Models of Flanking Structures and a Natural Example in the Quadrilátero Ferrífero, Minas Gerais

Gomes

Rodrigues²,

Endo

2017

An. Acad. Bras. Ciênc.

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The aim of this study is to present analog models of flanking structures and to analyze the Fábrica Nova synform, Quadrilátero Ferrífero, Minas Gerais, from a geometric point of view. We set up seven models using a linear viscous silicone and produced flanking structures with a shear velocity of 2 cm h -1 . At different initial orientations with respect to the shear zone boundary, a rigid cross-cutting element with lubricated boundaries was deformed via sinistral bulk flow at a shear strain of γ = 1.28. The most interesting features of our experiments are the geometries of the different marker lines, which are heterogeneous and resulted from thickening and thinning of the silicone at the cross-cutting element terminations. To compare our analog models and the Fábrica Nova synform, we analyzed the outermost marker line of the analog models and the top surface of the Cauê Formation in the Paleoproterozoic metasediments. The best comparisons between the experiments and the natural example were obtained by our CIS90 model in terms of the flexure shape near the cross-cutting element and the cross-cutting element orientation. Thus, we suggest that the cross-cutting elements in both situations act as obstacles and consequently produce local perturbations in laminar flow.

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Influence of erosion and sedimentation on strike-slip fault systems: insights from analogue models

Cited by 50 publications

References 27 publications

Application of open‐source photogrammetric software MicMac for monitoring surface deformation in laboratory models

Application of open‐source photogrammetric software MicMac for monitoring surface deformation in laboratory models

Deformation partitioning in a transtension-dominated tectonic environment: the illustrative kinematic patterns of the Neogene–Quaternary Ptolemais Basin (northern Greece)

Analog Models of Flanking Structures and a Natural Example in the Quadrilátero Ferrífero, Minas Gerais

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