近2ka闽浙沿岸泥质沉积物物源分析

Provenance Analysis of Mud along the Min-Zhe Coast since 2 kaBP

对近2ka以来闽浙沿岸泥质沉积物进行了粘土矿物和元素测试,粘土矿物对比分析表明,所研究的泥质沉积物来源为长江沉积物。金属元素聚类分析以及使用判别函数,均得到了与上述一致的结果。沉积物物源的定量计算表明,近2ka以来闽浙沿岸泥质沉积物中长江的贡献基本稳定在83%～85%,可以排除有黄河沉积物输入的可能,且历史上黄河的改道与北徙并没有对本区的沉积环境和沉积物来源产生明显的影响。

The clay minerals anti elements of the mud along the Min-Zhe Coast since 2 kaBP are analyzed. The provenanc＇e of the mud is froln sedilllents of the Yangtze River according to the study of clay minerals. The same results are drawn based on cluster analysis and differentiation function of metal elements. It is about 83% -85% of the mud from sedilnents of the Yangtze, River since 2 kaBP according to quantitative calculation, and sediments of the Yellow River did not reach the study area. It also shows that there is no apparent effect on the sedimentary environment and sediment provenance when the Yellow River changed its course and moved northward during the last 2 ka.