Buckling of the oceanic lithosphere from geophysical data and experiments

Article Abstract:

Undulations of 100-300 km. in the central Indian Ocean basin made be due to either buckling or inverse boudinage (aka whole layer folding and local thickening, respectively). Scaled oceanic crust models made up of a brittle layer over a ductile layer suggest that buckling ofthe top layer is more likely. The wavelength of folding is found to be 7 times the thickness of the brittle layer. Folding occurs without affecting the boundary between the lithosphere and asthenosphere.

Indian Ocean, Submarine geology, Marine geology

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The geometry of a deformed carbonate slope-basin transition: the Ventoux-Lure fault zone, SE France

Article Abstract:

The Ventoux-Lure fault zone is a triangular zone of folds and thrusts in the Alpine foreland of SE France. The zone corresponds to the site of a Lower Cretaceous carbonate slope-basin transition. Studies show the development of the zone towards the west into a zone of tectonic wedging and the occurence of compression at a high angle to the basin margin. The location and style of deformation depends on the mechanical stratigraphy of a basin-ramp transition.

France, Thrust faults (Geology), Thrust faults

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Paleostress magnitudes associated with development of mountain belts: insights from tectonic analyses of calcite twins in the Taiwan Foothills

Article Abstract:

Research into frontal structures of the Taiwan fold-thrust belt has been used to assess the stress levels linked with development of fault-related folds. It was possible to provide independent evidence to back up the depth-dependent strength and the frictional behaviour of the upper continental crust obtained from laboratory experiments.

Taiwan

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