Physical Modeling of Arc–Continent Collision: A Review of 2D, 3D, Purely Mechanical and Thermo‐Mechanical Experimental Models

Boutelier, David; Chemenda, A.

doi:10.1007/978-3-540-88558-0_16

Cited by 19 publications

(17 citation statements)

References 118 publications

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“…The first fault created in the arc area dipped toward the subducting continental plate (Figure 4c). Such faults generally lead to subduction polarity reversal [ Chemenda et al , 2001; Boutelier and Chemenda , 2011]. However, this fault was rapidly abandoned and a new oceanward dipping fault was created in the frontal part of the arc area, which led to subduction of the fore‐arc block (Figures 4d and 5).…”

Section: Resultsmentioning

confidence: 99%

“…During initial contact between the arc and the passive margin, the arc is laterally connected to segments of the plate boundary not yet undergoing continental subduction. Oceanic subduction in the two neighboring segments may result in weak compression or tension [ Shemenda , 1994; Boutelier and Chemenda , 2011]. The fore arc may therefore not be actively dragged downward in each neighboring segment.…”

Section: Discussionmentioning

confidence: 99%

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Fore‐arc deformation at the transition between collision and subduction: Insights from 3‐D thermomechanical laboratory experiments

2012

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[1] Three-dimensional thermomechanical laboratory experiments of arc-continent collision investigate the deformation of the fore arc at the transition between collision and subduction. The deformation of the plates in the collision area propagates into the subduction-collision transition zone via along-strike coupling of the neighboring segments of the plate boundary. In our experiments, the largest along-strike gradient of trench-perpendicular compression does not produce sufficiently localized shear strain in the transition zone to form a strike-slip system because of the fast propagation of arc lithosphere failure. Deformation is continuous along-strike, but the deformation mechanism is three-dimensional. Progressive along-strike structural variations arise because coupling between neighboring segments induces either advanced or delayed failure of the arc lithosphere and passive margin. The modeling results suggest that orogenic belts should experience deeper subduction of continental crust and hence higher-pressure metamorphism where the two plates first collided than elsewhere along the plate boundary where collision subsequently propagated. Furthermore, during the initial stage of collision the accretionary wedge is partially subducted, which leads to lubrication of the interplate zone and a reduction of shear traction. Therefore, a large convergence obliquity angle does not produce a migrating fore-arc sliver. Rather, the pressure force generated by subduction of the buoyant continental crust causes fore-arc motion. It follows that convergence obliquity during collision does not yield trench-parallel deformation of the fore arc and its influence on the collision process is limited. However, convergence obliquity may control the geometry of the active margin during the oceanic subduction stage prior to collision, and inherited structures may influence the propagation mechanism.Citation: Boutelier, D., O. Oncken, and A. Cruden (2012), Fore-arc deformation at the transition between collision and subduction: Insights from 3-D thermomechanical laboratory experiments, Tectonics, 31, TC2015,

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Fore‐arc deformation at the transition between collision and subduction: Insights from 3‐D thermomechanical laboratory experiments

2012

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“…The results presented above can be compared with the results from analogous modelling of subduction zone reversal by Boutelier and Chemenda (). An island in our model should be regarded as a continental edge in the analogue model.…”

Section: Discussionmentioning

confidence: 97%

“…Subduction reversal in our simulation ( a = 6, σ Y = 100 MPa) and (insets) in analogous experiment by Boutelier and Chemenda ().…”

Section: Discussionmentioning

confidence: 97%

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Numerical modelling of the late stage of subduction zone transference after an accretion event

Simakin

2013

Terra Nova

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The resumption of subduction of an oceanic plate at a contact with a docked island (continental) margin is modelled numerically in 2D. The mechanical properties of the crustal and mantle rock masses are treated with visco‐plastic rheologies where the viscosities are described by a dynamic power law phenomenologically accounting for the transient texture evolution of the deforming rock masses. The study is limited to the extreme case of a fluid weakened lithosphere characterized by a uniform effective yield stress. At a constant push of 8 cm a−1, the shear zones split the oceanic slab into blocks at the contact with the island. At a moderate yield stress (σY < 80 MPa) and normal relaxation rate of viscosity, subduction resumes in less than ca 1 Ma. High σY = 100 MPa leads to the island edge bending. A detached block of the island is subducted after the plunge of the oceanic plate reverses.

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Dynamics of the opposite‐verging subduction zones in the Taiwan region: Insights from numerical models

Lin

Kuo

2016

JGR Solid Earth

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The Taiwan mountain belt between the Eurasian and the Philippine Sea plate is a rare example for an orogen bracketed by two opposite‐verging subduction zones. The influences of the double subduction zones on regional dynamics have long remained unknown. In this study lithospheric deformation and mantle circulation in the Taiwan region are calculated with double subduction‐collision models. The results show that the limitedly deformed subducted Eurasian plate separates the highly deforming orogen above from the highly deforming mantle below. The edge flow driven by the rollback of the Philippine Sea slab dominates in the asthenosphere primarily as a result of the longer slab if the gap between the two slabs beneath Taiwan is sufficiently wide. The induced toroidal current gives rise to a pattern of seismic anisotropy compatible with that measured with teleseismic phases and coincidentally accordant with the strike of the orogen. The additional presence of a frequently hypothesized lithospheric fragment or slab tear disrupts the toroidal circulation and mars the model predictions for seismic anisotropy. We found that the rollback of the Eurasian slab deflects the plate downward and neutralizes the uplift, posing difficulty to models with Eurasian slab extending too far north. These results bolster the view that the Taiwan mountain belt is a subduction‐dominated orogen and both subduction zones play a key role on regional dynamics. Conceptual models specifically developed for large‐scale continent‐continent collision zones that have been commonly applied to the Taiwan region are inadequate for this ocean‐continent, opposite‐verging subduction‐collision system.

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Physical Modeling of Arc–Continent Collision: A Review of 2D, 3D, Purely Mechanical and Thermo‐Mechanical Experimental Models

Cited by 19 publications

References 118 publications

Fore‐arc deformation at the transition between collision and subduction: Insights from 3‐D thermomechanical laboratory experiments

Fore‐arc deformation at the transition between collision and subduction: Insights from 3‐D thermomechanical laboratory experiments

Numerical modelling of the late stage of subduction zone transference after an accretion event

Dynamics of the opposite‐verging subduction zones in the Taiwan region: Insights from numerical models

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