Asymmetric vs. symmetric deep lithospheric architecture of intra-plate continental orogens

Calignano, Elisa; Sokoutis, Dimitrios; Willingshofer, Ernst; Gueydan, Frédéric; Cloetingh, S.A.P.L.

doi:10.1016/j.epsl.2015.05.022

Cited by 33 publications

(30 citation statements)

References 48 publications

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“…The exaggerated topography can potentially be reduced by applying the topographic correction factor as described in Section 3.2.2. However, in the experiments of Calignano et al (2015) the authors scale densities (not density contrasts), which means that Eq. (27) should be used and a topographic correction should not be applied.…”

Section: Quantification and Scaling Of The Applied External Boundarymentioning

confidence: 96%

“…Davy and Cobbold, 1988;Ratschbacher et al, 1991;Martinod et al, 2000;Fournier et al, 2004;Regard et al, 2005), lithospheric shortening experiments (e.g. Davy and Cobbold, 1991;Buck and Sokoutis, 1994;Keep, 2000Keep, , 2003Moore et al, 2005a,b;Marques, 2008;Willingshofer and Sokoutis, 2009;Luth et al, 2013a;Calignano et al, 2015), lithospheric extension experiments (e.g. Benes and Davy, 1996;Brune and Ellis, 1997;Corti, 2008;Autin et al, 2010), and backarc extension experiments (e.g.…”

Section: Combined (External + Internal) Approachmentioning

confidence: 98%

“…For the scaling of forces and stresses, analogue modellers have used scaling rules to either scale densities (e.g. Davy and Cobbold, 1991;Shemenda, 1992Shemenda, , 1993Boutelier et al, 2003;Boutelier and Cruden, 2013;Calignano et al, 2015) or density contrasts (e.g. Jacoby, 1973;Funiciello et al, 2003;Schellart, 2004a;Meyer and Schellart, 2013;Duarte et al, 2013;Martinod et al, 2013;Chen et al, 2015a,b).…”

Section: Scalingmentioning

confidence: 99%

“…For example, externally+internally-driven laboratory models of lithospheric deformation (e.g. Willingshofer and Sokoutis, 2009;Dombrádi et al, 2010;Luth et al, 2013a;Calignano et al, 2015) and subduction (e.g. Martinod et al, 2013) have been presented, illustrating the evolution of the three-dimensional surface topography with digital elevation models.…”

Section: Quantification and Scaling Of The Applied External Boundarymentioning

confidence: 99%

“…In the first example, Calignano et al (2015) present intraplate continental orogeny experiments that include internal buoyancy forces and externally imposed velocity boundary conditions (piston) that drive convergence. The authors have quantified the topography, which reaches 12-13 mm in several of their experiments, scaling to 24-26 km using their length scale ratio (1 cm represents 20 km, e.g.…”

Section: Quantification and Scaling Of The Applied External Boundarymentioning

confidence: 99%

See 4 more Smart Citations

A review of analogue modelling of geodynamic processes: Approaches, scaling, materials and quantification, with an application to subduction experiments

Schellart

Strak

2016

Journal of Geodynamics

132

105

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a b s t r a c tWe present a review of the analogue modelling method, which has been used for 200 years, and continues to be used, to investigate geological phenomena and geodynamic processes. We particularly focus on the following four components: (1) the different fundamental modelling approaches that exist in analogue modelling; (2) the scaling theory and scaling of topography; (3) the different materials and rheologies that are used to simulate the complex behaviour of rocks; and (4) a range of recording techniques that are used for qualitative and quantitative analyses and interpretations of analogue models. Furthermore, we apply these four components to laboratory-based subduction models and describe some of the issues at hand with modelling such systems. Over the last 200 years, a wide variety of analogue materials have been used with different rheologies, including viscous materials (e.g. syrups, silicones, water), brittle materials (e.g. granular materials such as sand, microspheres and sugar), plastic materials (e.g. plasticine), viscoplastic materials (e.g. paraffin, waxes, petrolatum) and visco-elasto-plastic materials (e.g. hydrocarbon compounds and gelatins). These materials have been used in many different set-ups to study processes from the microscale, such as porphyroclast rotation, to the mantle scale, such as subduction and mantle convection. Despite the wide variety of modelling materials and great diversity in model set-ups and processes investigated, all laboratory experiments can be classified into one of three different categories based on three fundamental modelling approaches that have been used in analogue modelling: (1) The external approach, (2) the combined (external + internal) approach, and (3) the internal approach. In the external approach and combined approach, energy is added to the experimental system through the external application of a velocity, temperature gradient or a material influx (or a combination thereof), and so the system is open. In the external approach, all deformation in the system is driven by the externally imposed condition, while in the combined approach, part of the deformation is driven by buoyancy forces internal to the system. In the internal approach, all deformation is driven by buoyancy forces internal to the system and so the system is closed and no energy is added during an experimental run. In the combined approach, the externally imposed force or added energy is generally not quantified nor compared to the internal buoyancy force or potential energy of the system, and so it is not known if these experiments are properly scaled with respect to nature. The scaling theory requires that analogue models are geometrically, kinematically and dynamically similar to the natural prototype. Direct scaling of topography in laboratory models indicates that it is often significantly exaggerated. This can be ascribed to (1) The lack of isostatic compensation, which causes topography to be too high.(2) The lack of erosion, which causes topography to be too high....

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Section: Quantification and Scaling Of The Applied External Boundarymentioning

confidence: 96%

Section: Combined (External + Internal) Approachmentioning

confidence: 98%

Section: Scalingmentioning

confidence: 99%

Section: Quantification and Scaling Of The Applied External Boundarymentioning

confidence: 99%

Section: Quantification and Scaling Of The Applied External Boundarymentioning

confidence: 99%

See 3 more Smart Citations

A review of analogue modelling of geodynamic processes: Approaches, scaling, materials and quantification, with an application to subduction experiments

Schellart

Strak

2016

Journal of Geodynamics

132

105

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Inherited structure and coupled crust‐mantle lithosphere evolution: Numerical models of Central Australia

Heron

Pysklywec

2016

Geophysical Research Letters

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Continents have a rich tectonic history that have left lasting crustal impressions. In analyzing Central Australian intraplate orogenesis, complex continental features make it difficult to identify the controls of inherited structure. Here the tectonics of two types of inherited structures (e.g., a thermally enhanced or a rheologically strengthened region) are compared in numerical simulations of continental compression with and without “glacial buzzsaw” erosion. We find that although both inherited structures produce deformation in the upper crust that is confined to areas where material contrasts, patterns of deformation in the deep lithosphere differ significantly. Furthermore, our models infer that glacial buzzsaw erosion has little impact at depth. This tectonic isolation of the mantle lithosphere from glacial processes may further assist in the identification of a controlling inherited structure in intraplate orogenesis. Our models are interpreted in the context of Central Australian tectonics (specifically the Petermann and Alice Springs orogenies).

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Partitioning of crustal shortening during continental collision: 2‐D thermomechanical modeling

Liao

Gerya

2017

JGR Solid Earth

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Partitioning of crustal shortening between the colliding continental plates is highly variable in nature. Physical controls of such variability remain largely enigmatic and require quantitative understanding. In this study, we employ 2‐D thermomechanical numerical modeling to investigate the influence of the rheological properties of the continental crust on the dynamics and distribution of crustal shortening during continental collision. Three major physical parameters, (i) the mechanical strength of the upper crust, (ii) the Moho temperature, and (iii) the convergence rate, are investigated, and their influences on crustal shortening partitioning between the lower and upper plates are systematically documented. Numerical modeling results suggest that a strong upper crust of the lower plate, high Moho temperature, and slow convergence rate favor migration of crustal shortening from the lower to the upper plate. Our numerical modeling results compare well with natural observations from the Alpine orogenic system where variable partitioning of crustal deformation between the plates is documented.

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Asymmetric vs. symmetric deep lithospheric architecture of intra-plate continental orogens

Cited by 33 publications

References 48 publications

A review of analogue modelling of geodynamic processes: Approaches, scaling, materials and quantification, with an application to subduction experiments

A review of analogue modelling of geodynamic processes: Approaches, scaling, materials and quantification, with an application to subduction experiments

Inherited structure and coupled crust‐mantle lithosphere evolution: Numerical models of Central Australia

Partitioning of crustal shortening during continental collision: 2‐D thermomechanical modeling

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