Sources and Effects of Fluids in Continental Retrograde Shear Zones: Insights from the Kuckaus Mylonite Zone, Namibia
Photomicrographs of high-strain rocks from the KMZ. (a–c) are representative mylonites with feldspar porphyroclasts containing tensile and shear fractures, quartz ribbons, and a fine-grained matrix. (d–f) are representative ultramylonites, dominated by fine-grained mixtures of all constituent phases of the rock, with a few relict feldspar porphyroclasts. (a) Sample 31, Tsirub Gneiss from area C. (b) Sample 25, biotite gneiss from area D. (c) Sample 34, leucogranite from area C. (d) Sample 32, Tsirub Gneiss from area C. (e) Sample 10, biotite gneiss from area A. (f) Sample 42, leucogranite from area B. .