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Abstract: The History of the Paris Basin: A Record of Large-Scale Tectonic Movements of Tethys and Atlantic Origin

Francois Guillocheau, Cecile Robin, Paul Le Strat, Serge Barbier, Sylvie Bourquin, Stephan Derasse, Gilles Dromart, Fabrice Gaumet, Jean-Pierre Garcia, Jean-Marie Outin

Detailed mapping of depositional sequences (thicknesses, facies, lithologies) provides new constraints to reconstruct the geodynamical history of the Paris basin.

The Triassic-Jurassic evolution of the Paris basin is mainly controlled by large- scale extensional movements. These tectonic controls occur at two time-scale orders, 10-40 my (wave length: 500 to 1000 km) and 3-15 my (wave length: 200 to 400 km).

The first stop of subsidence is recorded at the Jurassic-Cretaceous boundary (Neo-Cimmerian or BCU unconformity) in response to strike-slip/compressional movements contemporaries of the opening of the Biscaye Bay. The Cretaceous period is mainly a strike-slip/extensional period with, temporarily, local (Mid-Albian) or general (Senonian) inversion of the basin.

During Cenozoic time the Paris basin is a large scale compressional basin due to the buckling of the lithosphere in response to the Alpine collision. Main compressional events occur during Middle Lutetian and Lower Bartonian. The uplift of the basin strata during Upper Oligocene with small-scale folding during Miocene.

Consequences in terms of depositional sequence nature and hierarchy are discussed.

AAPG Search and Discovery Article #90956©1995 AAPG International Convention and Exposition Meeting, Nice, France