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Sensitivity analysis of numerical scaled models of fold-and-thrust belts to granular material cohesion variation and comparison with analogue experiments
Uppsala universitet, Berggrundsgeologi.ORCID iD: 0000-0003-1744-7004
Department of Geology, University of Toronto, Canada .
Department of Geology, University of Toronto, Canada M5S 3B1 c School of Geosciences, Monash University, Melbourne, Australia.
2012 (English)In: Tectonophysics, ISSN 0040-1951, E-ISSN 1879-3266, Vol. 526-529, 196-206 p.Article in journal (Refereed) Published
Abstract [en]

Scaled analog and numerical brittle–viscous shortening models are employed to evaluate how fold–thrust structures evolve with changes in the cohesion of brittle materials, a rather poorly constrained physical parameter at this scale of experiment. The shortening models are characterized by various styles of shear zones and features resembling pop-up structures. The kinematics, geometry, and number of these structures are controlled by the viscous detachment layers in the models; the finite deformation of the model wedges is fundamentally different in model sets with one or two viscous layers. We demonstrate that the structural evolution of the numerical models is very sensitive to small changes in cohesion value. This is especially pronounced in the experiments that incorporate two weak viscous layers. The overall deformation of the numerical models is most similar to analog models when cohesion values are 70–80 Pa.

Place, publisher, year, edition, pages
Elsevier , 2012. Vol. 526-529, 196-206 p.
Keyword [en]
Cohesion; Brittle–viscous; Analog modeling; Numerical modeling; Fold-and-thrust belts
National Category
Geology
Research subject
Earth Science with specialization in Mineral Chemistry, Petrology and Tectonics
Identifiers
URN: urn:nbn:se:hig:diva-25000DOI: 10.1016/j.tecto.2011.06.022ISI: 000302664100018Scopus ID: 2-s2.0-84857923887OAI: oai:DiVA.org:hig-25000DiVA: diva2:1134596
Available from: 2011-01-18 Created: 2017-08-21Bibliographically approved

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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard-cite-them-right
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • sv-SE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • de-DE
  • Other locale
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Output format
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  • text
  • asciidoc
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