A case study for the formation of depositional sequences by computer simulations based on the regime concept

概要

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Two-dimensional computer simulation of depositional sequences based on the regime concept is applied to evaluate changes in their stacking patterns in response to geometry of basement, trajectories of relative sea-level changes and trend of subsidence. The simulation results that (1) stacking patterns of the sequences are different between which accumulated on the gentle coastal plain and that on the steep rocky coast, (2) differences in paths of relative sea-level changes, i. e. sinuous or zigzag-shaped, are reflected in stacking patterns from the transgressive to high-stand systems tract in the sequences, and (3) trajectories of isofathoms in progradational high-stand successions differ by the rates of subsidence increasing basinward and being constant. Then this model is also applied to reconstruct the thickness of the parasequences in a depositional sequence of the Plio-Pleistocene Kakegawa Group.
日本堆積学会の論文