Patterns of strain localization in heterogeneous, polycrystalline rocks – a numerical perspective

Gardner, R, Piazolo, S orcid.org/0000-0001-7723-8170, Evans, L et al. (1 more author) (2017) Patterns of strain localization in heterogeneous, polycrystalline rocks – a numerical perspective. Earth and Planetary Science Letters, 463. pp. 253-265. ISSN 0012-821X

Abstract

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Authors/Creators:
Copyright, Publisher and Additional Information: © 2017 Elsevier B.V. This is an author produced version of a paper published in Earth and Planetary Science Letters. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: anastomosing; shear zone; dynamic weakening; material strength; geometry; weak component
Dates:
  • Published: 1 April 2017
  • Accepted: 26 January 2017
  • Published (online): 3 March 2017
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst of Geophysics and Tectonics (IGT) (Leeds)
Depositing User: Symplectic Publications
Date Deposited: 06 Mar 2017 11:22
Last Modified: 09 Mar 2018 05:24
Published Version: https://doi.org/10.1016/j.epsl.2017.01.039
Status: Published
Publisher: Elsevier
Identification Number: https://doi.org/10.1016/j.epsl.2017.01.039

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Filename: Gardner et al _SuppData.pdf

Description: Supplementary data includes a flow diagram of the numerical model, information on the material strength bound calculation, incremental and accumulated strain plots for simulation set I and information on the supplied movies of the numerical model.

Filename: SuppMovie1.avi

Description: Simulation set III: Vertical stripe geometry with σThr = 6.0 showing the development of an interconnected weak layer (IWL). Movie is of stress in the polygons. Brown areas are relatively higher stress. At ∼10 s, the IWL is initiated with higher stress are

Filename: SuppMovie2.avi

Description: Simulation set III: Vertical stripe geometry with σThr = 6.0. This is from the same run as for movie 1, but shows the incremental strain in the polygons.

Filename: SuppMovie3.avi

Description: Simulation set IV: Cluster geometry with σThr = 5.0 and AThr = 15 showing development of anatomosing IWLs. Movie is of incremental strain in the 100 × 100 square grid of unconnected nodes. The strain in the IWLs varies over time due to the logic in Fig. 1

Filename: SuppMovie3a.avi

Description: Shows movie 3 continued to γ of ∼2.75. It shows by γ of ∼2.5 the IWL is dormant, and no longer concentrating any strain.

Filename: SuppMovie4.avi

Description: Simulation set IV: Incremental strain in cluster geometry with σThr = 4.0 and AThr = 15 for comparison with movie 3 to show impact of increased weakening (i.e. reduced stress threshold) – strain is more distributed.

Filename: SuppMovie5.avi

Description: Simulation set IV: Incremental strain in cluster geometry with σThr = 6.0 and AThr = 15 for comparison with movie 3 to show impact of decreased weakening (i.e. increased stress threshold) – strain is more concentrated.

Filename: SuppMovie6.avi

Description: Simulation set IV: Incremental strain in cluster geometry with σThr = 5.0 and AThr = 5 for comparison with movie 3 to show impact of increased strengthening (i.e. decreased age threshold) – increased strain variability in the IWLs.

Filename: SuppMovie7.avi

Description: Simulation set IV: Incremental strain in cluster geometry with σThr = 5.0 and AThr = 10 for the 100 × 100 square grid of unconnected nodes (movie 3), showing only those nodes where εIncr > 0.06 – strain in the IWLs varies over time.

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