摘要
对日照近海50个表层沉积物样品进行粒度计算、多元统计分析和沉积环境动力分区,结果表明研究区沉积物类型复杂,从泥质砂质砾到泥均有分布,共11种类型。沉积物粒度组成以砂和粉砂为主,砂含量占绝对优势,多以细砂形式存在。日照港和岚山港附近的沉积物粒径细,分选较差,负偏,峰态平坦,其它区域总体上粒径粗,分选差,正偏,峰态尖锐。研究区分为3个不同的沉积环境区。1区分布在傅疃河口近岸,为河口强动力沉积区;2区分布在东部15~20m水深区域,为潮流沉积和残留沉积混合作用区;3区分布在日照港和岚山港附近海域,为潮下低能沉积区。
50surface sediment samples were studied by Grain size calculation,multivariate statistical analysis and sedimentary dynamic classification,which were collected from the Rizhao offshore area.The grain size results show that the sediments types in the study area are complex,and there are 11 types of sediments distributed from gravel to clay.Among them,the sand and silt are dominant components,of which contents are up to 49.50%.The sand is accounted for an absolute advantage,mostly exist in the form of fine sand.The sediments near the Rizhao and Lanshan port with finer sizes are poorly sorted with negative skewness and flaty kurtosis,and the other sediments with coarser sizes are poorly sorted with positive skewness and sharp kurtosis.R-type cluster analysis shows that there are three clusters.The first cluster is composed of the sediments of more than 4φ,the second cluster consists of the sediments of 2~4φ,and the third cluster is composed of the sediments of less than 2φ.The study area can be partitioned into three divisions by Q-type cluster analysis which correspond with sedimentary dynamic classification.The fisrt zone located in Futuan estuarine modern depositional region with intense hydrodynamics,is a strong power sedimentary area in the estuary.The second area is a tidal sedimentary and residual sediment mixing zone in the 15 ~ 20 mdepth of eastern region.The third region near the Rizhao and Lanshan port where have weak hydrodynamic conditions,is a low-energy subtidal deposition area.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2016年第3期96-104,共9页
Periodical of Ocean University of China
基金
科技部基础性专项(2013FY112200)
海洋地质调查专项(GZH201100203)
山东地勘专项(201129)资助~~
关键词
粒度分析
多元统计
沉积环境
日照近海
grain size
multivariate statistics
sedimentary environment
Rizhao offshore
