摘要
渤海西部TJC-1孔51.50m以上120个沉积物样品化学组分、粒度及测年分析结果表明,TJC-1孔51.50m以上为晚更新世以来沉积,可划分为5个沉积单元;SiO2和Na2O与粗粒沉积物呈明显正相关,Al_2O_3,TFe_2O_3,MgO,TiO_2,Cu,Zn,Cr,Co,Ga,Rb和V等元素与细粒沉积物呈显著正相关,Sr,Ba和Zr分布与沉积物粒度无明显正或负的相关性。R-型因子分析显示,MgO和Na_2O分别代表陆源细粒物质输入(黄河与海河物质)和滦河物质的影响。SiO_2/Na_2O比值与Sr/Cu比值,Ba/Zn比值与K_2O/MgO比值离散图分析揭示了TJC-1孔的物质来源,该孔沉积物主要来源于黄河和海河,该孔下部30.50~51.50m和中下部25.00~30.50m沉积物以滦河物质来源为主。
120 sediment samples were collected from the upper 51.50 mpart of core TJC-1 in the western Bohai Sea.This study analyzed major and trace elements compositions,size parameters,and ages(AMS14 C dating and OSL dating).The results showed that the sediments from the upper 51.50 mpart of core TJC-1 were deposited since Late Pleistocene,and can be divided into five layers.The contents of SiO_2 and Na_2O were positively correlated with coarse-grained sediments,and those of Al_2O_3,TFe_2O_3,MgO,TiO_2,Cu,Zn,Cr,Co,Ga,Rb and V elements were positively correlated with the fine-grained sediments,and there was no significant correlation between the contents of Sr,Ba and Zr and grain sizes of sediment.Rmodel factor analysis showed that one group represented by MgO contents was derived from the input of fine-grained terrigenous sediments(Yellow River and Haihe River sediments),and the other group represented by Na_2O contents was derived from the input of Luanhe River sediment.The above characteristics,combined with the plots of SiO_2/Na_2O vs.Sr/Cu,Ba/Zn vs.K_2O/MgO,indicate that the source of sediments from core TJC-1 are mainly originated from the Yellow River and Haihe River,however,the sediments between 30.50~51.50 min the lower part and 25.00~30.50 min the mid-lower part are mainly from the Luanhe River.
出处
《海洋科学进展》
CAS
CSCD
北大核心
2018年第1期67-78,共12页
Advances in Marine Science
基金
国家自然科学基金--中国东部海岸带-陆架区晚更新世以来沉积体系演化及高分辨率气候-环境变化的沉积记录(41330964)
北黄海中部晚第四纪以来古河道的物源演变及其对海平面变化的响应(41406077)
中国地质调查局海洋地质调查项目--1:100万天津幅海洋区域地质调查(1212011220113)
1:25万锦西
营口幅海洋区域地质调查(GZH 201400205)
东部海域百万海洋区域地质成果集成与应用研究(DD20160137)
关键词
渤海西部
晚更新世
沉积物
地球化学
western Bohai Sea
Late Pleistocene
sediment
geochemistry
