南海北部陆坡区DLW3101孔沉积物特征及古环境意义  

Sediment characteristics and paleoenvironmental significance of Core DLW3101 from northern slope of the South China Sea

作　　者：周航[1] 刘乐军[2] 徐元芹[3] 周庆杰[3] 高珊[3] Zhou Hang;Liu Lejun;Xu Yuanqin;Zhou Qingjie;Gao Shan(The First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China;Marine Engineering Environment ＆ Geomatic Center,The First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China;Key Laboratory of Marine Sedimentology and Environmental Geology,The First Institute of Oceanography,State Oceanic Administra tion,Qingdao 266061,China)

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061 [2]国家海洋局第一海洋研究所海洋工程与测绘研究中心,山东青岛266061 [3]国家海洋局第一海洋研究所海洋沉积与环境地质国家海洋局重点实验室,山东青岛266061

出　　处：《海洋学报》2018年第7期103-115,共13页

基　　金：国家自然科学基金(41506071;41706065);国家自然科学基金委员会-山东省人民政府海洋科学研究中心联合资助项目(U1606401);全球变化与海气相互作用专项(GASI-GEOGE-05-03)

摘　　要：利用氧同位素地层学方法确定DLW3101孔底部年龄约为306ka BP,对沉积物进行粒度和地球化学元素分析,结果显示:22.1~63μm粗粒级组分的高值可用来指示海平面下降和东亚冬季风的强盛,0.35~1.16μm和2.32~13.14μm细粒级组分的高值可用来指示海平面上升和东亚夏季风的增强;Al/Ti和K/Ti比值反映的沉积物源区化学风化强度变化可用来指示东亚夏季风的强弱。Using the oxygen isotope stratigraphy method to establish the age mode of core DLW3101.The bottom of the core is about 306 ka old.Based on this age mode the sediments were used to make grain-size and XRF element scanning test.The conclusion shows that high values of 22.1-63μm grades may reveal the enhancement of East Asian winter monsoon and the decline of the sea level.High values of 0.35-1.16μm and 2.32-13.14μm grades may reveal the enhancement of East Asian summer monsoon and the rise of the sea level.Al/Ti and K/Ti ratio are adopted to reflect chemical weathering degree of sediments source area in order to reveal the strength of East Asian summer monsoon.

关 键 词：南海北部陆坡 粒度 地球化学元素 海平面 东亚季风 

分 类 号：P736.22[天文地球—海洋地质]