论文部分内容阅读
以黄河三角洲入海口地区为研究对象,采用岩性取心和静力触探等方法,对入海口地区黄河三角洲浅层沉积特征进行了分析。沉积相带主要以河道、决口扇、泛滥平原、潮坪为主,垂向序列类型主要为河口砂席-三角洲侧缘型和河口砂席-三角洲侧缘-砂席型两种。其中,入海口地区东北方向垂向序列主要以河口砂席-三角洲侧缘型为主;在西北方向,以河口砂席-三角洲侧缘-砂席型为为主。由此,提出了黄河三角洲发育的沉积模式。该认识不仅为本地区高密度地震采集提供了定量的表层地球物理参数,而且为层序地层学研究提供了一个实例。
The Yellow River Delta into the sea area as the research object, the use of lithocentric coring and static sounding and other methods to analyze the shallow sedimentary characteristics of the Yellow River Delta into the Haikou area. The main sedimentary facies belonged to river channel, ripple fan, flood plains and tidal flat. The vertical sequence types are mainly estuary sand mat - delta lateral margin and estuary sand mat - delta margin - sand mat. Among them, the northeastern vertical sequence of the Haikou area is dominated by the sand mouth of the mouth of the estuary - the lateral margin of the delta; and in the northwest direction, the sand table of the estuary - the lateral edge of the delta - sand sheet is the dominant one. As a result, the sedimentary model for the development of the Yellow River Delta is proposed. This understanding not only provides quantitative surface geophysical parameters for high-density seismic acquisition in this area, but also provides an example for the study of sequence stratigraphy.