黄海表层沉积物的矿物组成特征及其物源分析  

Composition of minerals in surface sediments of the Yellow Sea and their provenance

作　　者：韩宗珠[1,2] 王一冰 孙苑高 艾丽娜 吴晓[1,2] 杨叶飘 HAN Zongzhu;WANG Yibing;SUN Yuangao;AI Li'na;WU Xiao;YANG Yepiao(College of Marine Geosciences,Ocean University of China,Qingdao 266100,China;Key Laboratory of Submarine Geosciences and Prospecting Techniques,Ministry of Education,Qingdao 261000,China;The First Institute of Oceanography,Ministry of Natural Resources,Qingdao 261000,China)

机构地区：[1]中国海洋大学海洋地球科学学院,青岛266100 [2]海底科学与探测技术教育部重点实验室,青岛266100 [3]自然资源部第一海洋研究所,青岛266100

出　　处：《海洋地质前沿》2022年第4期10-19,共10页Marine Geology Frontiers

基　　金：国家自然科学基金“超慢速和快速扩张洋中脊岩浆作用的对比研究”(41376053)。

摘　　要：以黄海66个表层沉积物为研究对象,通过粒度、黏土矿物和碎屑矿物分析,研究了黄海表层沉积物的粒度分布与矿物组成特征,探讨了研究区沉积物的矿物组成特征对其物源、沉积环境的指示意义。黄海表层沉积物平均粒径为5.2Φ,分选较差;黏土矿物组合类型为伊利石-高岭石-蒙脱石-绿泥石,其中伊利石的含量最高,蒙脱石的含量最低;碎屑矿物(粒径为0.063~0.125 mm)平均含量为8.07%,标准偏差为4.03,分布趋势与平均粒径分布基本一致,轻矿物以石英和长石为主;重矿物以角闪石和绿帘石为主,其次是不透明矿物和片状矿物,重矿物主要集中分布于黄海南部。物源识别结果表明:黄海的东北部海域接受鸭绿江沉积物的供应;黄海北部主要为黄河源沉积物;南黄海西部沉积物主要为黄海沿岸流南下带来的现代黄河物质和再悬浮的老黄河沉积物;南黄海中部沉积物来源复杂以黄河沉积物为主,长江沉积物的供应较少。Based on the grain size,clay mineral and detrital mineral data of 66 surface sediment samples collected from the Yellow Sea,this paper is devoted to the grain size distribution and mineral composition characteristics of the samples with a detailed discussion on sediment provenance.The results suggest that the average grain size of surface sediments in the Yellow Sea is around 5.2Φ,with poor sorting.Clay minerals are characterized by the assemblage of illite-kaolinite-smectite-chlorite.Illite dominates and smectite is the lowest.The distribution of detrital minerals shows a similar pattern as the mean grain size.The light minerals mainly consist of quartz and feldspar.Heavy minerals mainly occur in the southern part of the Yellow Sea,dominated by hornblende and epidote.Study of material sources suggest that the sediments in the northeastern Yellow Sea are mainly from the Yalu River,while the provenance of the northern part is the modern Yellow River.In the western South Yellow Sea,sediments are mainly from the modern Yellow River either transported by coastal currents,or resuspended from the abandoned Yellow River delta in the northern Jiangsu Province.In the central South Yellow Sea,sediments are mainly from the Yellow River,followed by some supplement of sediments from the Yangtze River.

关 键 词：黄海 表层沉积物 矿物组成特征 物源分析 

分 类 号：P736[天文地球—海洋地质]