Dictionary of Geotourism

2020 Edition
| Editors: Anze Chen, Young Ng, Erkuang Zhang, Mingzhong Tian

Fault Zone

Reference work entry
DOI: https://doi.org/10.1007/978-981-13-2538-0_689

A fault zone is a banded structure consisting of a network of interconnected fractures (or fault planes) that divides two blocks. A fault zone has significant displacement, whereas a fracture zone has no obvious displacement. Tectonites are often developed along fault zones. Brittle fault zones contain cataclastic tectonites, including protocataclasite, cataclasite, ultracataclasite and unconsolidated ultracataclasite fault gouge. Ductile fault zones are composed of a series of mylonites (including protomylonite, mylonite, ultramylonite and phyllonite). Some fault zones have marked boundaries composed of a main boundary fault, whereas others are transitional and lack obvious boundaries. The sizes of fault zones can be categorised as giant, large, medium, small and minute. They can also be divided into superficial fault zones, basement fault zones, crustal fault zones and lithospheric fault zones. Fault zones can have compressional, tensional, shear, compressional-shear or...

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