Shear Zones of the Borborema Province, Including the Pernambuco Shear ZoneRoberto Weinberg, Monash University, Australia Gorki Mariano, Univeridade Federal de Pernambuco |
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a) S-C Mylonites
 Figure 1a-c. Well developed S-C fabric in granitic rock with mafic enclaves, pt 22. |
 Figure 1b. |
 Figure 1c. |
 Figure 2. Same granitic pluton as in Fig. 1. Shear zone termination |
b) East Pernambuco Shear Zone, Serra das Russas
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 Figure 1b. Zoom in showing the hinge zone of folded mylonite where a new mylontic axial planar cleavage is developed. Figure 1a (left). Vertical cross-section of dextral mylonite and ulltramylonite of the Pernambuco shear zone, at Serra das Russas. Notice the mafic band that defines a fold.
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 Figure 3. Folded mylonite. Notice finest grained ultramylonite at the contact with a more mafic rock. |
 Figure 4. Silicified ultramylonite, only metres away from Figures 1-3. |
c) Afogados da Ingazeira Shear Zone (photo: courtesy C. Archanjo)
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