La mine médiévale d'argent du Pontet,une fente alpine contemporaine de la surrection des massifs cristallins ? |
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Authors: | Jean-Louis Feybesse Marie-Christine Bailly-Maître Jean Feraud |
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Affiliation: | 1. Service « Ressources minérales », BRGM, BP 6009, 45060 Orléans, France;2. Laboratoire d''archéologie médiévale méditerranéenne, UMR 6572, université de Provence–CNRS, 5, rue du Château-de-l''Horloge, BP 647, 13094 Aix-en-Provence cedex, France |
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Abstract: | This study of the Pontet mine aimed at updating the understanding of ore-structural geology setting and, in terms of archaeology, at pointing out how the geometry of structures influenced the medieval workings and the shape of the galleries. The mineralisation and the WNW–ESE dextral normal faults controlling its emplacement are assigned to the Eocene by analogy with the neighbouring La Gardette structure. This confirms the Late Eocene to Oligocene age classically proposed for Phase 1 and places it in the Eocene. The Prégentil-type P1 folds described by Lameyre (1958) are here attributed to Phase 1, which raises the question as to whether the contemporaneous tectonic uplift of the crystalline basement should also be assigned to Phase 1 rather than to Phase 2. To cite this article: J.-L. Feybesse et al., C. R. Geoscience 336 (2004). |
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Keywords: | Isère mine du Pontet archéologie minière structurale chronologie déformation contraintes cinématique raccourcissement minéralisation plomb argent Isère Pontet mine mine archaeology structural chronology deformation constraints kinematics shortening mineralisation lead silver |
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