Mylonite
A rock classification type
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About Mylonite
A cohesive fault-rock which is characterised by tectonic reduction of grain size and recrystallisation in shear zones, and commonly contains lensoidal to rounded porphyroclasts and lithic fragments of similar composition to minerals in the matrix.
A compact, chert-like rock without strong cleavage, but with a streaky or banded structure, produced by the extreme granulation, shearing and recrystallisation of rocks that have been pulverized and rolled during overthrusting or intense dynamic metamorphism. Mylonite may also be described as a microbreccia with flow texture.
See Also: cataclasite, protomylonite, Mylonite gneiss, ultramylonite
A compact, chert-like rock without strong cleavage, but with a streaky or banded structure, produced by the extreme granulation, shearing and recrystallisation of rocks that have been pulverized and rolled during overthrusting or intense dynamic metamorphism. Mylonite may also be described as a microbreccia with flow texture.
See Also: cataclasite, protomylonite, Mylonite gneiss, ultramylonite
Unique Identifiers
Mindat ID:
48668
Long-form identifier:
mindat:1:1:48668:6
Similar Names
| Malanite | A valid IMA mineral species | Cu1+(Ir3+Pt4+)S4 |
| Malinite | A variety of | |
| Melanite | A variety of Andradite | Ca3Fe23+(SiO4)3 |
| Melinite | A synonym of 'Bole' | |
| Melliniite | A valid IMA mineral species | (Ni,Fe)4P |
| Mellonite | A synonym of Pseudocotunnite | K2PbCl4 |
| Melnöite | A rock subtype | |
| Melonite | A valid IMA mineral species - grandfathered | NiTe2 |
| Mullanite | A synonym of Boulangerite | Pb5Sb4S11 |
Classification of Mylonite
Sub-divisions of Mylonite
Synonyms of Mylonite
Common Associates
Associations Based on Photo Data:
| 14 photos of Mylonite associated with Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| 14 photos of Mylonite associated with Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| 6 photos of Mylonite associated with Calcite | CaCO3 |
| 2 photos of Mylonite associated with 'Biotite paragneiss' | |
| 1 photo of Mylonite associated with Garnet Group | X3Z2(SiO4)3 |
| 1 photo of Mylonite associated with K Feldspar |
Internet Links for Mylonite
mindat.org URL:
https://www.mindat.org/min-48668.html
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References for Mylonite
Reference List:
Rath quarry, Marhof, Stainz, Deutschlandsberg District, Styria, Austria