DIBAFILL: a 3-D two-lithology diffusive model for basin infilling

A C program based on the diffusion equation that simulates three-dimensiona l (3-D) basin infilling is described. The model solves the sets of non-line ar differential equations by a fully implicit finite-difference method usin g a Newton's scheme. DIBAFILL (DIffusion BAsin inFILL) can be employed for the prediction of 3-D morphology, sediment accumulation maps, and fraction distributions, as well as for studying process-response systems in sediment ary basins. The sensitivity of the diffusion coefficient to the lithology, depositional environment and grain size, makes it possible to adapt the pro gram for a wide range of shallow-water marine depositional systems, includi ng siliciclastic, mixed siliciclastic/carbonate and carbonate environments. The program includes an option to run the model with a depth-dependent car bonate production law. Applications to idealized basins are presented to sh ow the capabilities of the program at various spatial scales (reservoir and basin scales), and for different depositional environments (carbonate and siliciclastic). (C) 2000 Elsevier Science Ltd. All rights reserved.