Oblique plate motion and continental tectonics

Teyssier, Christian; Tikoff, Basil; Markley, Michelle

doi:10.1130/0091-7613(1995)023<0447:opmact>2.3.co;2

Cited by 325 publications

(195 citation statements)

References 12 publications

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“…If the reduction in fault width is simply due to horizontal rotation, then the amount of rotation (0) One example of an oblique continental collision is the Alpine Fault on South Island, New Zealand. Here the Pacific plate converges with the Australian plate at an angle corresponding to an obliquity ratio of about 0.64 [Teyssier et al, 1995], and the strain is not partitioned.…”

Section: Resultsmentioning

confidence: 99%

Analogue models of obliquely convergent continental plate boundaries

Burbidge¹,

Braun²

1998

J. Geophys. Res.

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Abstract. Analogue models are used to examine crustal-scale faulting at obliquely convergent continental plate boundaries. A uniform Coulomb material is deformed with basal kinematic boundary conditions to model two obliquely convergent lithospheric plates. The mantle part of one plate is assumed to detach from its overriding crust and then be subducted beneath the other plate. The obliquity of the collision is assumed to remain constant throughout the deformation. Experiments are run with obliquities ranging from pure convergence (low obliquity) to pure strike slip (high obliquity). Reverse faults are observed for all obliquities with a nonzero convergent component. By contrast, only collisions with a large amount of strike slip motion exhibit wrench faulting. In experiments dominated by their convergent component, the strike slip motion is totally accommodated by oblique slip along the reverse faults. Strain partitioning between reverse faults and wrench faults is only observed for experiments run above a certain critical partitioning obliquity. From the observed initial faults, we can deduce the change in orientation in the principal stress triad as the obliquity is changed. We propose that the initial direction of maximum compressive stress (•rl) rotates horizontally as the obliquity is changed, which in turn affects the geometry of the initial faults formed in the material. In the case of reverse faults, the rotation increases their dip measured along the direction of pure convergence. The relative magnitude of the minimum horizontal stress and the vertical stress determine whether reverse faults or strike slip faults are the first to form. Although long term deformation is more difficult to analyze, a simple relationship for the angle at which strain partitioning occurs is derived.

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Section: Resultsmentioning

confidence: 99%

Analogue models of obliquely convergent continental plate boundaries

Burbidge¹,

Braun²

1998

J. Geophys. Res.

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“…1991; Beck et al, 1993;Tikoff y Teyssier, 1994;Teyssier et al, 1995;McCaffrey, 1994McCaffrey, , 1996Wang et al, 2003;Yáñez y Cembrano, 2004;Chlieh et al, 2004;Tassara y Yáñez, 2003;Tassara, 2005). Los antecedentes expuestos en este trabajo no permiten explicar en detalle la interrelación entre los diferentes factores que condicionan el estilo de deformación observado.…”

Section: Síntesis Y Discusiónunclassified

Constricción neógena en la Cordillera de la Costa, norte de Chile: neotectónica y datación de superficies con 21Ne cosmogónico

2008

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“…Fournier and Petit, 2007;Philippon et al, 2015;Brune, 2016;Zwaan and Schreurs, 2017;Ammann et al, 2017), but is opposite to the convention used in almost as many articles (e.g. Tron and Brun, 1991;Teyssier et al, 1995;Clifton and Schlische, 2001;Deng et al, 2018). 5…”

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confidence: 82%

Oblique rifting: the rule, not the exception

Brune¹,

Williams²,

Müller³

2018

Preprint

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Abstract. Movements of tectonic plates often induce oblique deformation at divergent plate boundaries. This is in striking contrast with traditional conceptual models of rifting and rifted margin formation, which often assume 2D deformation 10 where the rift velocity is oriented perpendicular to the plate boundary. Here we quantify the validity of this assumption by analysing the kinematics of major continent-scale rift systems in a global plate tectonic reconstruction from the onset of Pangea breakup until present-day. We evaluate rift obliquity by joint examination of relative extension velocity and local rift trend using the script-based plate reconstruction software pyGPlates. Our results show that the global mean rift obliquity amounts to 34° with a standard deviation of 24°, using the convention that the angle of obliquity is spanned by extension 15 direction and rift trend normal. We find that more than ~70% of all rift segments exceeded an obliquity of 20° demonstrating that oblique rifting should be considered the rule, not the exception. In many cases, rift obliquity and extension velocity increase during rift evolution (e.g. Australia-Antarctica, Gulf of California, South Atlantic, India-Antarctica), which suggests an underlying geodynamic correlation via obliquity-dependent rift strength. Oblique rifting produces 3D stress and strain fields that cannot be accounted for in simplified 2D plane strain analysis. We therefore highlight the importance of 3D 20 approaches in modelling, surveying, and interpretation of most rift segments on Earth where oblique rifting is the dominant mode of deformation.

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Oblique plate motion and continental tectonics

Cited by 325 publications

References 12 publications

Analogue models of obliquely convergent continental plate boundaries

Analogue models of obliquely convergent continental plate boundaries

Constricción neógena en la Cordillera de la Costa, norte de Chile: neotectónica y datación de superficies con 21Ne cosmogónico

Oblique rifting: the rule, not the exception

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