文献类型：期刊文献

中文题名：湖光岩玛珥湖表层沉积物粒度特征及其物源指示意义

英文题名：Grain Size Characteristics of the Surface Sediments in Huguangyan Maar Lake and Its Significance to Sediment Source Analysis

作者：李自超[1,2];蒲晓强[1,2];赵辉[1,2];姜在兴[3];祁雅莉[1];黄鑫[1];侯庆华[1]

机构：[1]广东海洋大学海洋与气象学院,广东湛江524088;[2]广东省近海海洋变化与灾害预警技术重点实验室,广东湛江524088;[3]中国地质大学能源学院,北京100083

年份：2017

卷号：37

期号：3

起止页码：93

中文期刊名：广东海洋大学学报

外文期刊名：Journal of Guangdong Ocean University

收录：CSTPCD

基金：广东海洋大学团队项目(C13436);广东海洋大学创新强校工程科研项目(GDOU2014050246);创新强校工程项目(GDOU2016050241)

语种：中文

中文关键词：湖光岩玛珥湖;表层沉积物;粒度;物源;沉积环境

外文关键词：Huguangyan Maar Lake;surface sediments;grain size;source;sedimentary environment

中文摘要：对湖光岩玛珥湖82个表层沉积物样品进行粒度分析,计算平均粒径、分选系数、偏度和峰度等参数。结果表明:湖光岩玛珥湖表层沉积物主要包括泥、粉砂、砂质粉砂和粉砂质砂4种类型。粉砂和泥在湖内分布范围最广,为主要沉积类型;砂质粉砂和粉砂质砂主要分布在近岸区域,分布范围较小。沉积物平均粒径(Φ值)变化范围2.1~7.5,平均值为6.8,粒度具有由岸向湖随水深增加而逐渐变细的趋势,但在部分近岸区域,由于雨水汇集入湖导致粒度参数变化剧烈。靠近湖岸和火山岩壁,沉积物颗粒最细的区域并未出现在湖水最深处。湖光岩玛珥湖的表层沉积物频率曲线表现为4个明显的组分峰值,尽管沉积物质主要来源为四周火山岩风化产物,但是远距离搬运的细颗粒仍然对沉积物的粒度组分产生较大的影响。

外文摘要：82surface sediment samples are analyzed and their average values are calculated and sorting,skewness and kurtosis are conducted.The results show that Huguangyan Maar Lake surface sediments are mainly composed of four types of clastics,including mud,silt,sandy silt and silty sand.Among them,silt and mud take up the majority,which are the main sediment type;sandy silt and silty sand are distributed close to inshore region and take up minority.These samples average grain size range from2.1to7.5Φ,with an average value of6.8Φ.Generally,the grain size of sediment samples becomes finer with increasing of the water depth.However,near the inshore region,the grain size parameter changes dramatically because of the rain wash of the shore into the lake.It appears estuarine deposit trend.The deepest of lake,which is close to the lakeshore and volcanic rock wall,is not the place of the finest sediments region.There are four obviously peaks in frequency curves of the sediments of Huguangyan Maar Lake.Those indicate fine particles transported far away still had a large effect on the size fraction of sediments.