摘要
对鸭绿江水下三角洲K12钻孔进行了粒度分析和年代测定,探讨了粒度频率曲线和粒度参数的垂向分布规律。结果表明,K12钻孔是1954年至2014年的沉积,水动力条件以鸭绿江径流为主,潮流改造作用的影响正在逐步加强。这里沉积分为2个阶段,总趋势是粒度变细,水动力变弱,响应了近100年来鸭绿江流域径流和输沙日趋减少的态势。
The granularity analysis and sediment dating of the core K12 were carried out in the Yalu River underwater delta. The granularity frequency curve and the vertical distribution of the granularity parameters were discussed. The results indicated that the sediments in K12 came from the deposit from 1954 to 2014; the hydrodynamic condition was based on the Yalu River runoff,and the tidal rebuilding action became stronger. The deposit in K12 was divided into two stages. The general trend was that the granularity became thin and the hydrodynamic became weak gradually,which responded to the trend that the runoff and the sediment in the Yalu River basin grew decreasing during the 100 years.
出处
《辽东学院学报（自然科学版）》
CAS
2015年第4期251-255,共5页
Journal of Eastern Liaoning University:Natural Science Edition
基金
国家自然科学基金项目(41271028)
关键词
粒度特征
沉积环境
鸭绿江
频率曲线
210pb测年
granularity characteristic
sedimentary environment
Yalu River
frequency curve
210Pb dating
