近70年来南黄海中部泥质沉积物源的变化及其与东亚季风强度变化的响应关系  

Temporal Change in Sediment Provenance in the Central Mud Areas of the South Yellow Sea Over the Past 70 Years and Its Respond to that of the Intensity of the East Asian Monsoon

作　　者：安郁辉 陈彬[2,3] 张欣 陈立雷 盛琛[2,6] 杨磊 董超[7] 刘健 AN Yu-Hui;CHEN Bin;ZHANG Xin;CHEN Li-Lei;SHENG Chen;YANG Lei;DONG Chao;LIU Jian(College of Earth Sciences and Engineering, Shandong University of Science and Technology, Qingdao 266590, China;Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, China;Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China;School of Earth Sciences, China University of Geosciences, Wuhan 430074, China;Chinese Academy of Geological Sciences, Beijing 100032, China;School of Ocean Sciences, China University of Geosciences, Beijing 100083, China;Zhejiang Institute of Hydrogeology and Engineering Geology, Ningbo 315012, Zhejiang)

机构地区：[1]山东科技大学地球科学与工程学院,山东青岛266590 [2]中国地质调查局青岛海洋地质研究所,山东青岛266071 [3]青岛海洋科学与技术试点国家实验室,山东青岛266237 [4]中国地质大学(武汉)地球科学学院,湖北武汉430074 [5]中国地质科学院,北京100032 [6]中国地质大学(北京)海洋学院,北京100083 [7]浙江省水文地质工程地质大队,浙江宁波315012

出　　处：《中国海洋大学学报（自然科学版）》2020年第12期98-106,共9页Periodical of Ocean University of China

基　　金：国家自然科学青年基金项目(41906066);浙江中部海岸带综合地质调查项目(DD20190276);浙江省海岸带重点综合地质调查(嘉兴重点区)项目(2017005)资助。

摘　　要：对南黄海中部泥质区F0306柱状样沉积物中的210Pb同位素、粒度和常量元素进行了分析,综合探讨了长江物质在研究沉积物中所占比例的阶段性变化及其与东亚季风强度的关系。研究结果表明:不同时期长江物质在沉积物中所占的比例有所差异,这种差异与东亚季风强度的阶段性变化具有很好的对应关系。在1965—1980年期间,东亚季风强度减弱时,黄海暖流强度减弱(冬季)、苏北沿岸流和长江冲淡水向北扩散的能力减弱(夏季),导致搬运至研究区的长江细颗粒物质减少,造成沉积物中的黏土组分含量降低,沉积物地球与长江沉积物的DF(Fe/Mg)、DF(Ti)升高。The 210Pb activity,grain size and major elements of the sediments of the vibrocore F0306 were analyzed to investigate the temporal variation in relative contribution of the Yangtze River(YR)sediments to the study area and the couple relationship with the intensity of the East Asian Monsoon(EAM).The results showed the relative proportion of YR sediments is not constant.This difference responded to the temporal change of the intensity of the EAM well.When the EAM became weaker,less fine sediments of YR were transported to the study area by the Yellow Sea warm current,the Jiangsu coastal current and the Changjiang Diluting Water.As a result,the DF(Fe/Mg)and DF(Ti)increased and clay content decreased.

关 键 词：泥质区 南黄海中部 物源 常量元素 东亚夏季风 

分 类 号：P736.2[天文地球—海洋地质]