Naturally deformed quartzo-feldspathic rocks

 

Ultramylonites (Redbank shear zone, Australia)

Naturally deformed quartzo-feldspathic rocks

 

weak deformation (Mulwaree) / strong deformation (Mulwaree) / mylonites (Redbank) / ultramylonites (Redbank)

 

List of microstructures

 

 

 

 

83

 

Gradation from mylonite to ultramylonite (UM) in aplite deformed at greenschist conditions; the UM matrix shows fine-scale phase mixing.

84

 

Quartzo-feldspathic ultramylonite; feldspar porphyroclast has asymmetrical tails of recrystallized or neo-mineralized grains.

85

 

Quartzo-feldspathic ultramylonite (same as 84); rotated 45°.

86

 

Quartzo-feldspathic ultramylonite; feldspar porphyroclast has asymmetrical tails as well as white mica concentrations.

87

 

Quartzo-feldspathic ultramylonite; "bookshelf" feldspar has deformed by semi-brittle flow.