鸭绿江河口沉积物元素地球化学及其控制因素  

DISTRIBUTION AND CONTROLLING FACTORS OF MAJOR ELEMENTS IN SEDIMENTS OF THE YALU RIVER ESTUARY

作　　者：李家胜[1] 高建华[1] 李军[2] 王珍言 严杰[1] 白凤龙[2] 程岩[4] 

机构地区：[1]南京大学海岸与海岛开发教育部重点实验室,南京210093 [2]青岛海洋地质研究所,青岛266071 [3]中国科学院海洋研究所 中国科学院海洋地质与环境重点实验室,青岛266003 [4]辽东学院城市建设学院,丹东118003

出　　处：《海洋地质与第四纪地质》2010年第1期25-31,共7页Marine Geology & Quaternary Geology

基　　金：国家自然科学基金项目((40976051,40506022,40506013,40976036,40871019);教育部新世纪优秀人才支持计划(NCET-06-0446)

摘　　要：对鸭绿江河口地区的56个站位沉积物的常量元素含量进行了测试,并对测试结果进行了多元统计分析。研究结果表明,多数常量元素含量在鸭绿江西岸潮滩地区和西部海域波动较小,而在上游地区和河口口门地区变动较大,在河口最大浑浊带内出现两个峰值。R型主因子分析结果表明,粒度控制效应对鸭绿江河口地区常量元素的含量分布起着主要作用,贡献方差达76.55%。运用Q型聚类分析将各站位归为两种类型,揭示出沉积动力环境的差异是造成这种常量元素地球化学分区特征的最主要因素。此外,通过与附近河口对比发现鸭绿江河口及近岸地区沉积物中的常量元素含量同朝鲜半岛的河流、中朝准地台花岗岩以及朝鲜半岛花岗岩比较接近,但与长江和黄河有着较大的差异。Contents of major elements in the sediments of the Yalu River estuary were tested, and multivariate statistical analysis methods were used to analyze the characteristics of major element distribution in the study area. The major element contents show a small fluctuation in sediments in the tidal flat and in the west area of the estuary, and the fluctuation is more obvious upstream and at the river mouth of the Yalu River. Two peaks appear in the estuarine turbidity maxima zones. R-mode main factor analysis results show that grain size effect plays a dominant role in distribution of the contents of major elements, with the variance contribution of the first principal component up to 76.55% . Q-mode cluster analysis classifies the stations into two types, which suggests that difference of depositional dynamic environment is the main factor affecting geochemistry division pattern of the major elements. In addition, the major elements content in sediments of the Yalu River estuary is similar to that of the Korea River,to granite at Sino Korean paraplatform and Korean Peninsula, and different from that of the Yangtze River and the Yellow River.

关 键 词：地球化学 常量元素 控制因素 鸭绿江河口 

分 类 号：P736.4[天文地球—海洋地质]