Mylonite-dominated footwall geometry in a shear zone, central Pyrenees
- 1 July 1984
- journal article
- research article
- Published by Cambridge University Press (CUP) in Geological Magazine
- Vol. 121 (5) , 429-436
- https://doi.org/10.1017/s0016756800029964
Abstract
A major ductile shear zone in the gneissic core of the Saint-Barthélemy Massif, central Pyrenees, is characterized by an asymmetric shear strain profile defined as mylonite-dominated footwall geometry. The shear zone is part of a low angle fault system in the massif which caused thinning of a sequence of lithologic units and isograds. The shear zone is interpreted as a low angle normal fault zone of probably Cretaceous age, predating Alpine crustal shortening in the central Pyrenees.Keywords
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