Forward numerical modelling constraining environmental parameters (Aptian carbonate system, E Iberia)

The facies distribution in time and space of sedimentary successions is controlled by a complex interplay between physical, chemical biological processes, which are nowadays difficult to construe from the geological record. Numerical models constitute valuable tool identify quantify such controlling factors permitting reliable 3D extrapolation prediction stratigraphic architectures beyond outcropping rock strata. This study assesses roles three parameters being carbonate production rate, relative sea-level changes terrigenous clastic sediment supply, on evolution an Aptian system. SIMSAFADIM-CLASTIC, process-based sedimentary-stratigraphic forward model, was used for this evaluation. succession modelled crops out western Maestrat Basin (E Iberia), corresponded platform-to-basin transition comprising depositional environment-related assemblages: platform top, slope basin. Testing modelling results wide range possible scenarios. documented sequence-stratigraphic framework combined with virtual outcrop model were as reference perform geometric (quantitative) architectural stacking pattern (qualitative) research model-data comparison. interval spans 1450 ky. best-fit simulation run characterizes quantifies (1) fluctuations recording five different genetic types deposit (systems tracts) belonging two sequences expected field-data analysis, (2) rate input ranging 0.5 2.5 gr/s, (3) mean autochthonous maximum 0.08 m/ky. Furthermore, quantitative qualitative sensitivity tests carried highlight that fluctuation sea level exerted main control resulting architectures, whereas effect inflowing less pronounced. Facies assemblages show sensitivities each parameter, carbonates more sensitive than top fine sediments. On settings, siliciclastic also controls stratal patterns dimensions bodies formed. final allows spot features can be misinterpreted looking at record or using other 2D approaches, facilitates comprehension reservoir connectivity highlighting occurrence initial disconnected regressive platforms, later connected during transgressive stage.