Crustal fault reactivation facilitating lithospheric folding/buckling in the central Indian Ocean
Crustal fault reactivation facilitating lithospheric folding/buckling in the central Indian Ocean
High-quality, normal-incidence seismic reflection data confirm that tectonic deformation in the central Indian Ocean occurs at two spatial scales: whole lithosphere folding with wavelengths varying between 100 and 300 km, and compressional reactivation of crustal faults with a characteristic spacing of c. 5 km. Faults penetrate through the crust and probably into the upper mantle. Both types of deformation are driven by regional large intraplate stresses originating from the Indo-Eurasian collision. Numerical modelling of the spatial and temporal relationships between these two modes of deformations shows that, in agreement with geophysical observations, crustal faults are reactivated first with stick-slip behaviour. Subsequent lithospheric folding does not start until horizontal loading has significantly reduced the mechanical strength of the lithosphere, as predicted by elasto-plastic buckling theory. Modelling suggests that lithospheric folding does not develop in the absence of fault reactivation. Crustal fault reactivation, therefore, appears to be a key facilitating mechanism for oceanic lithospheric buckling in the central Indian Ocean.
1897799438
251-263
The Geological Society of London
Beekman, F.
87139e0a-2e30-4f56-b91e-fea97334e3a9
Bull, Jonathan M.
974037fd-544b-458f-98cc-ce8eca89e3c8
Cloetingh, S.
c51e0b6f-bc85-453e-8d58-3803dce86fa9
Scrutton, R.A.
95eded4e-f5ed-4ecc-8cd7-ecd916dc10a6
1996
Beekman, F.
87139e0a-2e30-4f56-b91e-fea97334e3a9
Bull, Jonathan M.
974037fd-544b-458f-98cc-ce8eca89e3c8
Cloetingh, S.
c51e0b6f-bc85-453e-8d58-3803dce86fa9
Scrutton, R.A.
95eded4e-f5ed-4ecc-8cd7-ecd916dc10a6
Beekman, F., Bull, Jonathan M., Cloetingh, S. and Scrutton, R.A.
(1996)
Crustal fault reactivation facilitating lithospheric folding/buckling in the central Indian Ocean.
In,
Buchanan, P.G. and Nieuwland, D.A.
(eds.)
Modern Developments in Structural Interpretation, Validation and Modelling.
(Special Publication of the Geological Society, 99)
London, GB.
The Geological Society of London, .
Record type:
Book Section
Abstract
High-quality, normal-incidence seismic reflection data confirm that tectonic deformation in the central Indian Ocean occurs at two spatial scales: whole lithosphere folding with wavelengths varying between 100 and 300 km, and compressional reactivation of crustal faults with a characteristic spacing of c. 5 km. Faults penetrate through the crust and probably into the upper mantle. Both types of deformation are driven by regional large intraplate stresses originating from the Indo-Eurasian collision. Numerical modelling of the spatial and temporal relationships between these two modes of deformations shows that, in agreement with geophysical observations, crustal faults are reactivated first with stick-slip behaviour. Subsequent lithospheric folding does not start until horizontal loading has significantly reduced the mechanical strength of the lithosphere, as predicted by elasto-plastic buckling theory. Modelling suggests that lithospheric folding does not develop in the absence of fault reactivation. Crustal fault reactivation, therefore, appears to be a key facilitating mechanism for oceanic lithospheric buckling in the central Indian Ocean.
Text
Beekman et al., 1996 Folding_in_the_Central_Indian_Ocean.pdf
- Author's Original
More information
Published date: 1996
Organisations:
Geology & Geophysics
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Local EPrints ID: 346546
URI: http://eprints.soton.ac.uk/id/eprint/346546
ISBN: 1897799438
PURE UUID: 1f3e32bb-0ed5-4aa8-87f5-f81aa7755b8d
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Date deposited: 02 Jan 2013 10:51
Last modified: 15 Mar 2024 02:44
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Contributors
Author:
F. Beekman
Author:
S. Cloetingh
Author:
R.A. Scrutton
Editor:
P.G. Buchanan
Editor:
D.A. Nieuwland
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