The Functional Relation between Base-level Cycle and A /S Ratio and TheirGeologic Implications

Key words: 
• base-level cycle /
• the A /S ratio

Abstract: By apply ing the base-level cycle theory of high-resolution sequence stratig raphy, we have delicately analyzed the fluctuat ion of base-level cycle. The oscillation of the base level results in their relative variation of accommodation space and sedimentary alimentation. The variation rates of them have also changed, then lead to the difference of facies sequence, the degree of stratig raphic preservation and stacking pattern at the same territory in different ages,or the difference of phase area at different territories at the same age. U sing stratig raphic base level defined by Cross and their physical attributions of re lated parameters: sed imentary alimentation, the variation rate of accommodation space, the rate of sed imentary a limentation and sedim entary fluxes, this paper has established the correspond ing function models, deduced their functional equations, illustrated their relations, and generalized their variability and geologic implications. All those contribute to understand the process of sed imentary change and the high-resolution correlation and partition in high revolution stratigraphic sequence