Construct · 1 fields · 1 citations

mylonite: a standalone construct

One name. One construct. A landmark on the map.

● anchor · one construct, one field Nearest construct by meaning·not indexed
mylonite1 CONSTRUCTMyloniteSIBSON · DUCTILE SHEAR

A single standalone construct; nearby constructs are located against it in the Collider. Tap a field for its definition, unit, and measures.

Structural geology

Rock milled fine by ductile shear

In structural geology, a mylonite is a fine-grained, strongly foliated rock produced in a fault or shear zone where rock deformed by ductile flow rather than by brittle fracture, its original grains reduced in size and smeared into streaky layers as the crust slid at depth. Sibson's 1977 Fault rocks and fault mechanisms placed mylonites within a classification of fault rocks, distinguishing them from the broken, cohesionless products of shallow brittle faulting. The referent is a specific class of ductilely sheared rock, diagnostic of deformation below the brittle–ductile transition, identified by its grain-size reduction and penetrative fabric.[1]

Unit
The degree of grain-size reduction and development of shear fabric in a sheared rock
Recovery means
Not applicable
Measured by
Identified by reduced grain size, penetrative foliation and lineation, and kinematic shear indicators in thin section

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Nearby constructs

slickenside1 fields · 2 citationsanchor · one construct, one fieldfoliation2 fields · 2 citationsjingle · one word, two constructsclass3 fields · 3 citationsjingle · one word, three constructs

References

  1. Sibson, R. H. (1977). Fault rocks and fault mechanisms. Journal of the Geological Society, 133(3), 191–213. https://doi.org/10.1144/gsjgs.133.3.0191

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