黄河沉积物向渤海湾扩散的沉积地球化学示踪  

The Sedimentary Geochemical Trace of the Yellow River Sediments Diffusion in the Bohai Bay

作　　者：张爱滨[1,2] 刘明[1,2,3] 廖永杰[1,2,4] 张艳丽[1,2] 范德江[1,2] 

机构地区：[1]海底科学与探测技术教育部重点实验室,山东青岛266100 [2]中国海洋大学海洋地球科学学院,山东青岛266100 [3]海洋沉积与环境地质国家海洋局重点实验室,山东青岛266061 [4]国家海洋局海域管理技术重点实验室,辽宁大连116083

出　　处：《海洋科学进展》2015年第2期246-256,共11页Advances in Marine Science

基　　金：海洋沉积与环境地质国家海洋局重点实验室开放基金--渤海强烈人类活动区重金属沉积记录研究(MASEG201204);国家海洋局海域管理技术重点实验室开放项目--围填海对周边海域沉积环境影响的沉积学评价模型研究(201203);国家海洋局海洋公益性行业科研专项--海洋底质环境多元地球化学评价技术及其在典型区的示范应用(201105003-06)

摘　　要：使用ICP-AES和ICP-MS对渤海中部118°54′E左右南北向断面的表层沉积物中53种常、微量及稀土元素进行了测试,研究了其含量变化和分布特征,并进行了物质组成分析。研究表明:该区沉积物以B94站为界,南北差异明显,南部区域沉积物以黏土质粉砂为主,富集Al2O3,CaO,Fe2O3,MgO,MnO,P2O5和TiO等常量元素以及绝大多数的微量元素和稀土元素等与细颗粒黏土矿物相关的元素;北部区域沉积物以粉砂-砂为主,富集SiO2,K2O和Na2O等常量元素以及Zr,Ba,Sr,Sb和Hf等微量元素,稀土元素相对亏损。物源对比表明南部沉积物具有黄河来源沉积物特点,北部沉积物具有滦河来源特点,两者的分界大致在38°42′N附近。河口动力过程、渤海环流是影响该区沉积物扩散的主要因素。The 53 major, trace elements and REEs of the surface sediments collected near 118°54′ E in the central Bohai Bay were tested using ICP-AES and ICP-MS. Their contents, spatial distributions and the sediment compositions were analyzed. The results showed that the sediments in studied area were quite different between the north and south regions with B94 station as a boundary. In the southern region, sediments were mainly clayey silt enriched in Al2O3, CaO, Fe2 O3, MgO, MnO, P2O5, TiO and the vast majority of the trace elements and rare earth elements associated with the fine particles of clay minerals. Meanwhile, the northern region was mainly the silt-sand sediments enriched in the major elements of SiO2, K2O, Na2O and the trace elements of Zr, Ba, Sr, Sb, Hf etc. , and was relatively deficit in REEs. The comprehensive provenance analysis showed that, the southern region sediments were mainly affected by the Yellow River sediments, while the sediments in the north region were mainly come from the Luanhe River. The boundary was roughly near 380421 N. The estuarine dynamic process and the circulation in Bohai sea is the main factor affecting the sediment diffusion in this area.

关 键 词：黄河沉积物 渤海湾 扩散 物源 元素地球化学 

分 类 号：P736.2[天文地球—海洋地质]