石油探鉱における堆積リズム解析の可能性

第四紀日本海海洋循環ダイナミックスの復元を例として

抄録

Sedimentary rhythm analysis is a method to study sedimentary cycles through the systematic sampling and analysis of the sequences, derivation of multiple paleoenviron-mental parameters from the analytical data, and examination of the frequencies in variation of these parameters and their phase relationships. Through sedimentary rhythm analyses, it is possible to study the dynamics of paleo-ocean circulation. In this short paper, I would like to show the application of this method to reconstruct dynamic behaviour of the surface and deep water circulation within the Japan Sea corresponding to the glacial-interglacial sea-level oscillations during late. Quaternary. Reconstruction of this sort is useful to understand the paleoenvironment as well as mechanism(s) of the petroleum source rock deposition within marginal seas.