Experimental study of sliding friction and stick-slip on faults in floating ice sheets

Sammonds, P. and Hatton, D. and Feltham, D. and Taylor, P. (2005) Experimental study of sliding friction and stick-slip on faults in floating ice sheets. In: UNSPECIFIED.

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We have undertaken double-direct-shear friction experiments with floating ice sheets. These tests have been done at the ice basins at HSVA, Hamburg and the Helsinki University of Technology (HUT). Floating ice blocks are pushed past each other, with slip displacement, stress and acoustic emissions monitored at the interfaces. We have therefore measured the effect of frictional sliding on simulated faults. Mostly the sliding took a stick-slip form. The velocity and shear stress are non-uniform in space as well as in time. Measurements of the same stick-slip cycle, at several positions along the fault, allow us to identify a nucleation zone, which begins to slip before the rest of the fault and to relate this spatial variation of velocity and the temporal variation of shear stress; the slipping region, therefore, behaves like a wave-packet, propagating away from the nucleation zone.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Uncontrolled Keywords: 2005 AREP 2005 P IA49 BPI
Divisions: 02 - Geodynamics, Geophysics and Tectonics
Volume: 1
Page Range: pp. 303-312
Depositing User: Sarah Humbert
Date Deposited: 08 Nov 2011 11:58
Last Modified: 23 Jul 2013 09:58
URI: http://eprints.esc.cam.ac.uk/id/eprint/1549

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