Regional mapping of the South Armorican shear zone (Brittany, France) using remotely sensed SPOT imagery |
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| Authors: | Herv Ysou Joel Rolet |
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| Institution: | Hervé Yésou,Joel Rolet |
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| Abstract: | The South Armorican shear zone is one of the major occurrences of Variscan basement in Europe. The objectives of the study were to compile a lineament and a structural map from remotely sensed SPOT imagery. Transparent color films, enhanced by high-pass filtering and by stretching color composites, and spatial filtered images were analysed. The major structure mapped corresponds to a dextral transcurrent shear belt in which C and S axes have been described. Late Paleozoic and Tertiary fracturations truncate these structures. The localisation, extension and geometry of granite domes were also precised. Lastly, this study provides a good example of structural interpretation of a moderate-relief terrain using high-resolution SPOT imagery. |
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