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据钻孔揭露,苏北弶港地区全新统为一完整的海进—海退层序,由滨海相、近岸浅海相和潮滩相构成。近岸浅海相由细砂或粉砂质细砂组成,比较沉积学研究表明,这一埋藏沙体属潮沙体类型并与弶港现代潮流沙脊群有明显的成因上联系。埋藏潮沙体可区分为潮沙堤、潮沙波和潮沙脊三个亚相,它们是在冰后期海进一海退过程中,随着长江三角洲前展、南偏,长江携来的砂质物质在强潮流作用下依次形成并逐渐并滩成陆,被掩埋于现代滨海平原之下的。现代辐射状潮流沙脊群是埋藏潮沙体的发展延续,并指出在弶港附近的沙脊今后将继续逐渐并岸。
According to the borehole exposing, the Holocene in the Quangang area of northern Jiangsu is a complete seaward-receding sequence, consisting of the coastal facies, the shallow coastal facies and the tidal flat. Nearshore shallow marine facies are composed of fine sand or silty fine sand. Comparative sedimentology studies show that this buried sand body is of a tide-sand body type and has an obvious causal relationship with the modern tidal current sand ridges in Port Bengang. The buried tidal bodies can be divided into three sub-facies: tidal flats, tidal flats and tidal flats. They are transported in the late ice period by the seaward-receding process. As the Yangtze River Delta progresses to the south, the Yangtze River brings Sandy material is formed under the action of strong tides and gradually becomes a land on the beach and is buried beneath the modern coastal plains. The modern radiant tidal sand ridges are the continuation of the buried tide sand body and point out that the sand ridges near ouang Port will continue to gradually shore up.