南黄海北部B03孔黏土矿物和稀土元素地球化学特征及物源分析  

Clay Minerals and Geochemical Characteristic of Rare Earth Elements and Provenance Analysis from B03 Hole Sediments in the Northern Part of the South Yellow Sea

作　　者：韩宗珠[1,2] 孙宇菲[2] 塔金璐[2] 王传[2] 赵利[2] 

机构地区：[1]中国海洋大学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

出　　处：《中国海洋大学学报（自然科学版）》2016年第6期60-67,共8页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(41376053)资助~~

摘　　要：本文通过对南黄海北部B03孔沉积物黏土矿物组成、黏土粒级沉积物元素地球化学分析以及沉积速率研究,探讨其物质来源及其环境变化记录。研究认为,B03孔沉积物中黏土矿物组分以伊利石为主,同时含有较多蒙脱石,伊利石-蒙脱石-(高岭石+绿泥石)判别图解表明该岩芯源区主要来自黄河沉积物;B03孔黏土粒级沉积物稀土元素分布模式显示,90cm以上的黏土粒级沉积物稀土元素球粒陨石标准化分布模式与黄河沉积物的较为接近,表明其与黄河沉积物的亲缘性较大。结合B03孔的210Pb测年结果和稀土元素地球化学特征,推测1855年黄河改道对山东半岛东部陆架海的物源影响是造成该岩芯以90cm为界分为上下两段沉积的主要原因。In the paper,we have studied the clay minerals composition,the elements geochemical analysis of clay fraction sediments and deposition rate of B03 hole sediments that obtained from the northern part of the South Yellow Sea mud area,and explored the sedirnets source and sedimentary environment variations.Studies suggest that B03 hole clay mineral assemblages show the core is mainly illite,it also contains more smectite,discrimination diagram of illite-smectite-（kaolinite＋chlorite）indicates the core is mainly consist of Yellow River sediments.B03 hole clay-grain size sediments REE distribution patterns show that chondrite-normalized REE distribution patterns of 90 cm above clay-grain size is close to Yellow River sediments REE distribution pattern,indicating agreater affinity with the Yellow River Sediments.B03 hole integrated 210 Pb dating results and rare earth elements geochemical analysis can be inferred that provenance impact in 1855 of the Yellow River in eastern Shandong Peninsula shelf seas is the main reason to the core is divided into two deposits as 90 cm bounary.

关 键 词：南黄海 黏土矿物 稀土元素 物源 沉积环境 

分 类 号：P574.2[天文地球—矿物学]