Philip J. Heron
Stranding continental crustal fragments during continent breakup: Mantle suture reactivation in the Nain Province of Eastern Canada
Heron, Philip J.; Peace, A.L.; McCaffrey, K.J.W.; Sharif, A.; Yu, A.J.; Pysklywec, R.N.
Authors
A.L. Peace
Professor Kenneth Mccaffrey k.j.w.mccaffrey@durham.ac.uk
Head of Department
A. Sharif
A.J. Yu
R.N. Pysklywec
Abstract
Earth’s continental crust has evolved through a series of supercontinent cycles, resulting in a patchwork of Archean cores surrounded by terranes, fragments, and slivers of younger crustal additions. However, the dispersal (and/or stranding) of continental fragments during breakup is not well understood. Inherited structures from previous tectonic activity may explain the generation of continental terranes by controlling first-order deformation during rifting. Here, we explored the influence of lithospheric deformation related to ancient orogenesis, focusing on the impact of the Torngat orogen in the genesis of the Nain Province continental fragment in Eastern Canada. We present three-dimensional continental extension models in the presence of an inherited lithospheric structure and show that a narrow continental terrane could be separated and stranded by deep lithospheric scarring. The results show that continental terranes formed by this method would be limited to a width of 100–150 km, imposed by tectonic conditions during continental suturing. The findings have broad implications, demonstrating an original theory on the fundamental geologic problem of terrane generation and continent breakup.
Citation
Heron, P. J., Peace, A., McCaffrey, K., Sharif, A., Yu, A., & Pysklywec, R. (2023). Stranding continental crustal fragments during continent breakup: Mantle suture reactivation in the Nain Province of Eastern Canada. Geology, 51(4), 362-365. https://doi.org/10.1130/g50734.1
Journal Article Type | Article |
---|---|
Acceptance Date | Nov 28, 2022 |
Online Publication Date | Feb 9, 2023 |
Publication Date | 2023-04 |
Deposit Date | Mar 2, 2023 |
Publicly Available Date | May 30, 2023 |
Journal | Geology |
Print ISSN | 0091-7613 |
Electronic ISSN | 1943-2682 |
Publisher | Geological Society of America |
Peer Reviewed | Peer Reviewed |
Volume | 51 |
Issue | 4 |
Pages | 362-365 |
DOI | https://doi.org/10.1130/g50734.1 |
Public URL | https://durham-repository.worktribe.com/output/1178000 |
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Copyright Statement
© 2023 The Authors. Gold Open Access: This paper is published under the terms of the CC-BY license
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