Evolution of the Pyrenees During the Variscan and Alpine Cycles, Volume 1

Nicolas Saspiturry is a teacher-researcher specializing in the tectonic-sedimentary and thermal evolution of sedimentary basins. He has devoted much of his work to the Pyrenees.Jessica Uzel has a doctorate in geology and a degree in life, earth and universe sciences. She specializes in the post-compressive evolution of the Pyrenean domain.Alexandre Ortiz has a doctorate in geology. He specializes in the syn- to post-compressive evolution of the North Pyrenean foreland basin.

• Preface xiNicolas SASPITURRY, Jessica UZEL and Alexandre ORTIZChapter 1. Tectonics and Geodynamics of the Variscan Cycle in the Pyrenees 1Bryan COCHELIN, Charles GUMIAUX, Benjamin LE BAYON, Yoann DENÈLE and Thierry BAUDIN1.1. Introduction 11.2. State of the knowledge at the start of the RGF Pyrenees project 21.3. Variscan tectonics 191.4. Geodynamic integration 541.5. Implications of Paleozoic basement structuring on Alpine phases 591.6. References 63Chapter 2. Structure and Texture of Pb-Zn Mineralization: Example of a Multiscale Study in the Pyrenees to Constrain One-forming Processes and Critical Metals Mobility 81Alexandre CUGERONE, Bénédicte CENKI, Émilien OLIOT and Manuel MUÑOZ2.1. Introduction 812.2. Geological overview of the Pyrenean Axial Zone . 852.3. Structures of the studied Pb-Zn mineralizations 872.4. A novel interest in base metal mineralizations: the presence of critical metals 932.5. Discussion and conclusions 952.6. References 96Chapter 3. Meso-Cenozoic Kinematics of Western Europe Applied to the Pyrenean Domain 103Paul ANGRAND and Frédéric MOUTHEREAU3.1. Introduction 1033.2. Geological and scientific background 1053.3. State of the art: the Iberian-European plate boundary and issues 1083.4. Geodynamic evolution of the Western European domain 1123.5. Discussion of the main scientific issues surrounding the kinematics of the Iberian plate 1243.6. Acknowledgments 1273.7. References 127Chapter 4. Sedimentary Breccias Synextension in the North-Eastern Pyrenees 149Tarik KERNIF, Thierry NALPAS, Romain BOUSQUET and Roman CHELALOU4.1. Introduction 1494.2. The breccias of the north-eastern Pyrenees 1514.3. Discussion 1594.4. Conclusion 1624.5. References 163Chapter 5. The North Pyrenean Zone: Hyper-thinned Rift Crust and Exhumed Mantle 165Yves LAGABRIELLE5.1. The North Pyrenean Zone: introduction 1655.2. The NPZ: a surprising association of varied lithologies 1685.3. Mechanisms of crustal thinning and mantle denudation in the NPZ – recent field data and modern models 1885.4. Conclusion 2215.5. Acknowledgments 2215.6. References 222Chapter 6. The Bay of Biscay Opening in the Frame of the Iberian-European Plate Boundary Formation 241Julie TUGEND and Isabelle THINON6.1. Introduction 2426.2. Structure and age of the Bay of Biscay . 2456.3. The Bay of Biscay and the Iberian-European plate boundary 2586.4. Future challenges 2606.5. Acknowledgments 2626.6. References 262Chapter 7. The Trimouns Talc-Chlorite Deposit 273Michel DE SAINT BLANQUAT, Philippe DE PARSEVAL, Alexandre BOUTIN, Benoit QUESNEL and Marc POUJOL7.1. The central place of Trimouns in the geology of the Pyrenees 2737.2. Pyrenean talc and its exploitation 2757.3. History of the work 2797.4. Geological context 2817.5. Lithology, structure and microstructures 2847.6. Ore, mineralogy and fluids 2957.7. Geochronological data 3027.8. Synthesis and formation model 3057.9. Conclusions and perspectives 3067.10. Acknowledgments 3097.11. References 310List of Authors 317Index 321