Journal article

On the destructive tendencies of cratons

CM Cooper, RJ Farrington, MS Miller

GEOLOGY | GEOLOGICAL SOC AMER, INC | Published : 2021

Abstract

We propose that subducting slabs may cause lithospheric removal by directing mantle flow along the craton margin. This process could carve and shape the cratons, leading to conditions that impact the overall (in)stability of the lithosphere. We use three-dimensional geodynamic models to investigate how subduction-driven directed flow interacts with cratonic lithosphere of differing shape, concluding that the margin shape controls both channelization of flow around the craton as well as the potential for destruction. While the simulations show that all craton shapes aid in channelization, the cratons with straight vertical margins are the most resistant to deformation, and the cratons with gr..

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Grants

Awarded by U.S. National Science Foundation (NSF)


Awarded by Australian Research Council


Awarded by NSF


Funding Acknowledgements

Cooper was supported by the U.S. National Science Foundation (NSF) (grant EAR-1112820), Farrington was supported by the Australian Research Council (grant DP130101946), and Miller was supported by the NSF (grant EAR-1054638). This work used XSEDE (Extreme Science and Engineering Discovery Environment; https://www.xsede.org), which is supported by NSF grant number ACI-1548562. This work was enabled by Auscope and the National Computational Infrastructure (NCI), which are supported by the Australian Government via the National Collaborative Research Infrastructure Strategy (NCRIS). We appreciate the constructive feedback from the reviewers of this paper.