The origin of sedimentary basins: State of the art and first results of the task force

摘要: The origin of sedimentary basins is a key element the geological evolution continental lithosphere. During last decade substantial progress has been made in understanding thermo-mechanical aspects basin formation and isostatic response lithosphere to surface loads such as basins. Most this not so much terms development new modelling methodologies insights into rheological makeup but rather processing substantial, new, high-quality data sets from previously unexplored areas globe. Virtually all carried out far lithospheric displacements, thus refraining full examination dynamic controls exerted by stresses. This because stresses are very sensitive adopted rheologies these have been, convention, unrealistically simple. true models for both extensional compressional For example, most (Roberts et al., 1991) keyed strain due an unknown unspecified stress field than known and/or realistic state. Moreover, changes plate tectonic regimes associated fields shown be quite important controlling subsidence record stratigraphic architecture Similarly, developed environments (e.g., McClay, conventionally related flexure profiles (displacement patterns), again invoking control intrinsic particular setting. Another reason that relationship between displacements received attention little about actual state situation recently changed drastically result successful World Stress Map Project framework International Lithosphere Program @back, 1992). Further, application structural techniques establish temporal paleo-stress begun number (Letouzey, 1990). Not only deformation inadequately addressed present quantitative incapable solving problems subsequent developments may intrinsically coupled with formation. late-stage compression during post-rift can largely explain current discrepancies estimates crustal thinning derived analyses rifted (Kooi Cloetingh, 1989). Further role faults offshore like North Sea requires detailed studies exposed successions those found intramontane transpressional Post-rift or transtensional leads complex near-surface patterns. In cases inversion, inher-