摘要
孟村古黄河三角洲分流河道体系代表歧口三角洲超级叶瓣(700BC—11AD)的上三角洲平原沉积物,其下的三角洲沉积层序多属于更老的超级叶瓣。山东北部大口河至徒骇河口海岸700BC—1099AD多次受到黄河的影响,埕口—马山子东北部的海岸平原主要形成于893—1048年,那里岛链状贝壳堤开始形成的时间晚于1128年,与贝壳堤的14C年龄相差700～1850a。苏北斗龙港口—港海岸平原地表之下约9m厚的沉积物主要是黄河入海泥沙在海流作用下向南搬运,并沉积下来。苏北黄河三角洲南界在港附近。自然地理和海洋地质工作者采纳"公元前602年或战国中期(公元前4世纪)发生第一次大改道"的观点是一个误会,实际上这是多数历史地理学家已经放弃的认识。
The distributary channel system which shows that the old Yellow River delta in Mengcun belongs to the upper delta plain of the Qikou delta superlobe (700 BC to AD 11). Most of the channel system is much younger than the underlying undersea delta deposits, which belong to other two older delta superlobes. The coast from the Dakou River to the Tuhai River mouth in the northernmost Shandong Province was affected many times by the Yellow River from 700 BC to AD 1099. The land was mainly formed in 893—1048. The islandchain shaped shell ridges along the coast were formed after AD 1128. A great area behind the shell ridges has been eroded by wave and tidal currents. It shows that the delta plain lower than the adjacent area experienced such processes after the delta superlobe was abandoned. The southern boundary of Northern Jiangsu delta superlobe of the Yellow River lies at Jianggang, Jiangsu Province. The viewpoint of the first great channel shifting occurring in 602 BC should not be accepted. This viewpoint has been given up by historical geographers.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
2003年第3期23-29,共7页
Marine Geology & Quaternary Geology
基金
中国地质调查局国土资源大调查资助项目(200111000003)
