南海北部陆架沉积物矿物记录的全新世东亚夏季风变化  

Variation of the East Asian Summer Monsoon During the Holocene as Recorded by Mineral Composition of Sediments from an Archive of Continental Shelf Sediments in the Northern South China Sea

作　　者：黄超 王鹏[1] 孔德明 黄鑫 HUANG Chao;WANG Peng;KONG De-ming;HUANG Xin(Guangdong Key Laboratory of Coastal Ocean Variation and Disaster Prediction/College of Ocean and Meteorology,Guangdong Ocean University,Zhanjiang 524088,China;Key Laboratory of Ocean and Marginal Sea Geology,CAS,Guangzhou 510301,China)

机构地区：[1]广东省近海海洋变化与灾害预警重点实验室/广东海洋大学海洋与气象学院,广东湛江524088 [2]中国科学院边缘海与大洋地质重点实验室,广东广州510301

出　　处：《广东海洋大学学报》2020年第4期35-40,共6页Journal of Guangdong Ocean University

基　　金：广东省自然科学基金项目(2020A1515010500);中国科学院边缘海与大洋地质重点实验室资助(OMG2019-10);黄土与第四纪地质国家重点实验室开放基金资助项目(SKLLQG1908);中国科学院海洋地质与环境重点实验室开放基金课题资助(MGE2019KG04);广东海洋大学“创新强校”资助项目(230419097);广东海洋大学科研启动费资助项目(R19007)。

摘　　要：【目的】探讨南海北部大陆架泥质区岩芯沉积物矿物学特征与气候环境变化的关系。【方法】利用岩芯沉积物矿物学开展研究。【结果】岩芯沉积物碎屑物质主要由石英、长石、伊利石和绿泥石组成。【结论】岩芯沉积物中黏土/长石的比值是比较可靠的古气候变化代用指标,记录了研究区域过去7500年以来东亚夏季风的演变历史。7500-2000 cal yr BP期间,东亚夏季风整体上呈现减弱变化趋势,其中7500-3500 cal yr BP期间,东亚夏季风相对强盛,而3500-2000 cal yr BP期间,东亚夏季风相对较弱。【Objective】This study investigates the environmental effect on mineral composition of sediments from the South China Sea(SCS).【Method】Detailed environmental mineral study of sediments from the YJ Core derived from the northern inner shelf of the SCS was performed.【Result】Quartz,feldspar,illite,and chlorite constitute most of the terrigenous detrital material.【Conclusion】The ratio of clay/feldspar is sensitive to local climatic/environmental conditions.We have used the clay/feldspar of these sediments to accurately reconstruct the change of the East Asian summer monsoon(EASM)over the past 7500 cal yr BP.From 7500 to 2000 cal yr BP,the EASM exhibits an overall decreasing trend,with strong EASM during the 7500–3500 cal yr BP but weak EASM during the 3500–2000 cal yr BP.

关 键 词：东亚夏季风 全新世 南海 矿物组成 

分 类 号：P532[天文地球—古生物学与地层学]