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Journal article
Ripplocations provide a new mechanism for the deformation of phyllosilicates in the lithosphere
Nature communications, v 10(1), pp 686-686
15 Feb 2019
PMID: 30770801
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Deformation in Earth's lithosphere is localised in narrow, high-strain zones. Phyllosilicates, strongly anisotropic layered minerals, are abundant in these rocks, where they accommodate much of the strain and play a significant role in inhibiting or triggering earthquakes. Until now it was understood that phyllosilicates could deform only by dislocation glide along layers and could not accommodate large strains without cracking and dilation. Here we show that a new class of atomic-scale defects, known as ripplocations, explain the development of layer-normal strain without brittle damage. We use high-resolution transmission electron microscopy (TEM) to resolve nano-scale bending characteristic of ripplocations in the phyllosilicate mineral biotite. We demonstrate that conjugate delamination arrays are the result of elastic strain energy release due to the accumulation of layer-normal strain in ripplocations. This work provides the missing mechanism necessary to understand phyllosilicate deformation, with important rheological implications for phyllosilicate bearing seismogenic faults and subduction zones.
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Details
- Title
- Ripplocations provide a new mechanism for the deformation of phyllosilicates in the lithosphere
- Creators
- Joe Aslin - University of LiverpoolElisabetta Mariani - University of LiverpoolKarl Dawson - University of LiverpoolMichel W Barsoum - Drexel University
- Publication Details
- Nature communications, v 10(1), pp 686-686
- Publisher
- Springer Nature
- Number of pages
- 1
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000458754400001
- Scopus ID
- 2-s2.0-85061598551
- Other Identifier
- 991019167802504721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Geochemistry & Geophysics