Deep-Water Combined-Flow Sedimentary Structure in the Xujiajuan Formation of Xiangshan Group, Ningxiaoft-com:office:office" />

• 责任者：Li Xiangdong (School of Geosciences ; Yangtze University ; Jingzhou 434023 ; China) ; He Youbin
• 刊名：Acta Geologica Sinica
• 出版年：2010
• 卷期：84(2)
• 关键词：浊流 ; turbidity currents ; 沉积构造 ; sedimentary structure ; 宁夏 ; Ningxia
• 页码：p.221-232
• 图表：7 illus., 1 table, 59 refs.
• 分类号：0803
• issnNo：ISSN0001-5717
• isbnNo：CN11-1951/P

Deep-water deposits in the Xujiajuan Formation of Xiangshan Group are composed of grayish green, yellowish green, fine- to medium-grained light metamorphic sandstone, calcareous sandstone, siltstone and shale (slate). Based on the flume experiment and observation of modern ocean sedimentation, this study in combination with previous researches set up a facies diagram of combined flow bottom, and a schematic diagram of combined flow sedimentation caused by flows and waves in relatively shallow water. The result shows that the combined-flows are responsible for the formation of the combined-flow ripple lamination, quasi-planar lamination and asymmetric small-scale hummocky cross stratification in the Xujiajuan Formation.  oft-com:office:office" />