• 责任者：Li Guoxin (Institute of Sedimentary Geology ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Xu Shenglin
• 刊名：Geology in China
• 出版年：2012
• 卷期：39(4)
• 关键词：砂体 ; sand bodies ; 鄂尔多斯盆地 ; Ordos Basin
• 页码：p.923-930
• 图表：illus., 21 refs.
• 分类号：1003
• issnNo：ISSN1000-3657
• isbnNo：CN11-1167/P

Based on a study of core, logging and seismic data, this paper studied characteristics of high-resolution sequence stratigraphy of Chang-6 Subsection of Yanchang Formation. The authors found that from northeast to southwest, the distribution model of base- level cycle varies in order of typeA1→typeA2→typeB1→typeB2→typeC or typeA2, and recognized one long-term and four medium-term cyclic sequences （MSC1, MSC2, MSC3 and MSC4） . A high-resolution sequence stratigraphic framework of medium-term cyclic sequences was established. It is found that sand bodies were mainly developed in the subaquatic distributary channels of prograding deltas whose base-level cycle was of type A1 and type A2, and the sand bodies were also developed in the alluvial fan whose base-level cycle type was type A2.