DUCTILE SHEARING AND REMOBILIZATION OF PORPHYRITIC GRANITE IN KORO-EGBE AREA, SOUTHWESTERN NIGERIA.
dc.contributor.author | Adedoyin, A.D. | |
dc.contributor.author | Bamigboye, O.S. | |
dc.contributor.author | Adekeye, J.I.D. | |
dc.contributor.author | Ojo, O.J. | |
dc.date.accessioned | 2018-10-05T10:39:32Z | |
dc.date.available | 2018-10-05T10:39:32Z | |
dc.date.issued | 2013 | |
dc.description.abstract | Penetrative metamorphic tectonite fabrics, folds, and shear zones constitute the main structural elements in Koro- Egbe area. Results of field mapping, which was used to constrain the shear zone, revealed the nature of the fabrics in the grey gneiss, schist, meta-basites and the Pan African granites in the area. The development of penetrative fabrics in the large-scale sheeted rocks defines the first deformation episode, D1. The second deformation episode D2, is revealed in the horizontal asymmetric folds (Koro-Egbe folds), while a major shear-zone developeded during a post-folding phase defines the D3 event. Within the shear-zone, bodies of porphyritic biotite granite of Pan African age (600±150Ma) were strongly tectonised with a north-easterly steeply-dipping foliation. Outside the shear zone, the porphyritic granite is relatively undeformed, preserving strong igneous textures. Smaller bodies of fine-medium grained biotite granite occur within the deformed porphyritic bodies in the shearzone. It is consideredthat the petrogenesis of these smaller bodies is strongly linked with the shearing under a high geothermal condition. | en_US |
dc.description.sponsorship | Self | en_US |
dc.identifier.uri | http://hdl.handle.net/123456789/1217 | |
dc.language.iso | en | en_US |
dc.publisher | Faculty of Pure and Applied Sciences, LAUTECH, Printed in Nigeria | en_US |
dc.subject | DUCTILE SHEARING | en_US |
dc.subject | REMOBILIZATION | en_US |
dc.subject | PORPHYRITIC GRANITE | en_US |
dc.subject | KORO-EGBE AREA | en_US |
dc.subject | SOUTHWESTERN NIGERIA | en_US |
dc.title | DUCTILE SHEARING AND REMOBILIZATION OF PORPHYRITIC GRANITE IN KORO-EGBE AREA, SOUTHWESTERN NIGERIA. | en_US |
dc.type | Article | en_US |
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