Tectonic evolution of Variscan Iberia: Gondwana-Laurussia collision revisited

摘要: An integrated interpretation of the late Paleozoic structural and geochronological record Iberian Massif is presented discussed under perspective a Gondwana-Laurussia collision giving way to Variscan orogen. Compressional extensional structures developed during building orogenic crust Iberia are linked together into major tectonic events operating at lithosphere scale. A review tectonometamorphic magmatic evolution reveals backs forths in overall convergence between Gondwana Laurussia amalgamation Pangea times. Stages dominated by compression characterized subduction, both oceanic continental, development arcs, (over- under-) thrusting continental lithosphere, folding. resulted eventual transference large allochthonous set peri-Gondwanan terranes, Allochthon, onto mainland. The Allochthon bears imprint previous interaction Laurussia, including their juxtaposition after closure Rheic Ocean Lower Devonian governed extension featured opening two short-lived basins that dissected crust, first Lower-Middle Devonian, following Ocean, then early Carboniferous, emplacement allochthon. additional, intra-orogenic event early-middle Carboniferous dismembered individual thrust stacks separated faults domes. Lateral tectonics played an important role through orogenesis, especially creation new blocks intracontinental strike-slip shear zones stages convergence.