- 责任者：Miao Xiaolong (School of Energy Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Wang Hongliang
- 刊名：Acta Sedimentologica Sinica
- 出版年：2013
- 卷期：31(6)
- 关键词：高分辨率层序地层学 ; high resolution sequence stratigraphy ; 岩相学 ; petrography
- 页码：p.1088-1093
- 图表：4 illus., 20 refs.
- 分类号：1200
- issnNo：ISSN1000-0550
- isbnNo：CN62-1038/P
As a key parameter in high-resolution sequence stratigraphy, the ratio of accommodation to sediment sup ply, named A/S for short, has been used to divide stratigrahpic base-level cycles. However, A/S has been classified into unity, increasing, decreasing and below zero, without any real data. According to the record of litho-facies and its thickness responded to the variation of A/S, this paper proposes an approach, named A/S interval quantization principle within special interval, to quantify the real data of A/S. Based on the former research, we found real sedimentary model, and set number on each litho-facies within the model （frombottom to top, ZYXWDCBA, 12345678, respectively）. According the numbers＇changing, they are classified two in- tervals, base-level rising （number bigger upward） and base-level falling （number smaller upward）. In each interval, we define the ratio, number of sediment litho-face to number of bottom sediment litho-face, as A/S data, and every A/S data of litho-face is the same. The A/S data and its vertical changing has the same meanings with which in high resolution sequence stratigraphy. Applying the approach, we quantify A/S data on classic braided-river sedimentary litho-faces. With two prac tices, we found the A/S data on the former research, and based on which to classify short-term base-level cycle. Comparing with the former research, the division of base-level based on the approach has ideal similarity. At the same time, the division is single and operation-simple, which can avoid the phenomenon that different base-level division in the same sediment.