A Closer Look into Slickenlines: Deformation On and Under the Surface

Ortega-Arroyo, Daniel; Peč, Matěj

doi:10.1002/essoar.10507787.1

Cited by 1 publication

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“…Where can such fault rocks be found in nature? Detailed studies of fault mirrors and slickenlines document abundance of nanocrystalline fault rocks occupying small volumes adjacent to a fault surface (e.g., Ault et al., 2019; Ma et al., 2006; Ortega‐Arroyo & Pec, 2020; Siman‐Tov et al., 2013) as well as the presence of AMs intermixed with the nanocrystalline fragments coating fault surfaces (Faber et al., 2014; Kirkpatrick et al., 2013; Ohl et al., 2020; Ozawa & Takizawa, 2007). These observations suggest that formation of extremely fine‐grained to amorphous fault rocks is common in nature as well.…”

Section: Discussionmentioning

confidence: 99%

Formation of Nanocrystalline and Amorphous Materials Causes Parallel Brittle‐Viscous Flow of Crustal Rocks: Experiments on Quartz‐Feldspar Aggregates

Peč

Nasser

2021

JGR Solid Earth

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Relative motion of tectonic plates is accommodated along lithosphere-scale shear zones. The strength and stability of these shear zones control large-scale tectonics and the location of earthquakes (Bürgmann & Dresen, 2008;Molnar, 2020). Laboratory-derived strength profiles of the lithosphere postulate that the strength in the upper crust is controlled by frictional sliding along preexisting fractures, while the strength of the lower crust and upper mantle is controlled by viscous flow of rocks (Brace & Kohlstedt, 1980;Goetze & Evans, 1979;Kohlstedt et al., 1995). In this traditional view of the strength of the lithosphere, the transition from frictional sliding to viscous flow is abrupt and occurs at the intersection of Byerlee's rule with a dislocation creep flow law for a mineral of choice deforming at a constant strain rate. This sharp

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