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SUMMARY:Viscoplastic model of mountain building - Elvinas Ribinskas\, DAMT
 P
DTSTART:20230220T130000Z
DTEND:20230220T140000Z
UID:TALK196060@talks.cam.ac.uk
CONTACT:Prof. John R. Taylor
DESCRIPTION:Accretionary wedges are collections of sediment that form at c
 onvergent plate margins. On the surface they often look like mountain rang
 es. Modelling these structures allows to understand how they evolve and wh
 at are mechanical properties of the sediments that form them.\n\nI will pr
 esent a viscoplastic thin-film model of an accretionary wedge\, where an i
 nitially uniform horizontal layer of fluid is scraped off by a vertical ba
 ckstop. The model is found to have three asymptotic self-similar regimes t
 hat are controlled by the dimensionless Bingham number.\n\nAnalogue experi
 ments inspired by the model geometry are done to test the model prediction
 s. Surface buckling is observed in all of the experiments\, resembling rea
 l accretionary wedges. I will discuss some features of the buckles and ide
 as in which this phenomenon might be studied.
LOCATION:MR5\, CMS
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