• 责任者：Guo Jia (School of Energy Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Deng Hongwen
• 刊名：Geoscience
• 出版年：2011
• 卷期：25(4)
• 关键词：晚侏罗世 ; Upper Jurassic ; 沉积相 ; sedimentary facies ; 北京 ; Beijing
• 页码：p.642-649
• 图表：6 illus., 1 table, 16 refs.
• 分类号：0803
• issnNo：ISSN1000-8527
• isbnNo：CN11-2035/P

The sedimentary facies of the Upper Jurassic Houcheng Formation silicified wood outcrops in north of Yanqing area are interpreted jointly with sedimentary structure and characters of sedimentary sequence. This area mainly developed braided river deposits. The main sedimentary microfacies include channel, channel bar, pond and overflow deposits. This paper summarized the characteristics of base-level cycle, and clarified how the stratigraphic stacking pattern changed with different A/S ratios. The connectivity of channel sand is good under low A/S ratio and vice versa. The thickness of overflow deposits can be seen as the judgment basis of accommodation as it increases with rising A/S ratio.