Pedra Furada, close to the town of Venturosa, Alagoinhas Pluton (24L 0739267E 9051982N)
| In the page entitled Syn-Magmatic Deformation in Alagoinhas Pluton several features related to syn-magmatic deformation of a single outcrop were described, including boundinage, shearing and melt extraction. This page expands on that with more features from the same pluton as well as others. |
a) Shear Zone and Enclaves (24L 0743377E 9062224N, Alagoinhas Pluton pt 20)
 Figure 1. Shear zone through an enclave. Note the felsic material in between the two enclave parts, and the shearing of feldspar phenocrysts in the granite. |
Figure 2. Mafic enclave with a broken and rotated tip. Crack filled in by felsic fractionated granite. The tip is rotated into a shear zone (see Fig. 2). |
 Figure 3. Dextral shear zone (parallel to pen) breaking off the tip of enclave. Shear zone is marked by the rotation of feldspar phenocrysts from their main orientation parallel to main enclave elongation. |
 Figure 4. Same shear zone as in Figs 1 and 2, showing the dextral disruption of another enclave. |
b) Subtle Sinistral Shear Zones Defined by Phenocryst Rotation
(Alagoinhas Pluton close to Pedra Furada pt 19)
 Figure 5. Shear zone (east-west in photo) defined by the rotation of phenocrysts giving rise to a sinistral drag fold. |
 Figure 6. Shear zone (east-west in photo) defined by the rotation of phenocrysts from the south,defining a sinistral drag fold, but truncating phenocrysts in the north side. |
 Figure 7. Shear zone (est-west in photo) defined by the rotation of phenocrysts giving rise to a sinistral drag fold. |
 Figure 8. Shear zone (east-west in photo) defined by the rotation of phenocrysts from the south into a sinistral drag fold, but truncating the trend defined by phenocrysts in the north side. |
 Figure 9. Shear zone (diagonal from upper left) defined by the rotation of phenocrysts. Note that outside the main shear zone, on the south side of photo, phenocrysts are orineted in two main directions and locally tiled such as to suggest shearing. |