Discussion on syntectonic emplacement of the Maladeta granite (Pyrenees) deduced from relationships between Hercynian deformation and contact metamorphism

Article Abstract:

The hypothesis that the batholith emplacement is coeval with the main Hercynian deformation phase (D2) with regard to the syntectonic emplacement of the Maladeta granite in the Pyrenees fails to consider the cross-cutting relationships between the granitoids and some macrostructures. This implies that several large-scale observations must first be taken into account in establishing the chronological relationships between the Maladeta granodiorite and the Hercynian structures, including the observation that the main Hercynian deformation phase in the Pyrenees in actually older than was previously thought.

Granite

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Post-emplacement extension within a thrust sheet from the central Pyrenees

Article Abstract:

Deformation sequenceand emplacement of the Pic de Port thrust sheet in the Gavarnie thrust, centralPyrenees is considered via analysis of its secondary faults and related veins. Bedding-parallel simple shear followed by localized deformation of extensional fault arrays resulted in a sequence of X-shears, X-X' shears and R-shears. Forward rotation followed by backward rotation of the stress system is inferredfrom the orientation of the extension veins. A model relating this spreading-gliding regime to the tectonic development of the south Pyrenean thrust belt is proposed.

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Discussion on syntectonic burial and post-tectonic exhumation of the southern Pyrenees foreland fold-thrust belt

Article Abstract:

Coney, et al.'s discussion on the stratigraphic geology and paleontology of the southern Pyrenees should not be considered as all-encompassing and does not apply to the entire region. Their generalization on syntectonic burial is at odds with established research. Contrary to Coney et al.'s conclusions, other areas such as the Ebro Basin and the Jaca Basin exhibit different characteristics from those that have been observed in adjacent areas.

Geology, Structural, Structural geology

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