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学科主题: Multidisciplinary Sciences
题名: A rock magnetic record of Asian cooling and aridification processes during 1.95-0.40 Ma in the southeastern Chinese Loess Plateau
作者: [Wu Yi] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China ; [Wu Yi ; Zhu ZhaoYu ; Qiu ShiFan] Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Marginal Sea Geol, Guangzhou 510640, Guangdong, Peoples R China ; [Rao ZhiGuo] Lanzhou Univ, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou 730000, Peoples R China
通讯作者: zhuzy@gig.ac.cn
关键词: Chinese Loess Plateau ; eolian deposits ; hematite ; paleoclimate ; environmental magnetism
刊名: CHINESE SCIENCE BULLETIN
发表日期: 2013
卷: 58, 期:30, 页:3636-3644
部门归属: 海洋地质
资助者: This work was supported by the National Basic Research Program of China (2010CB833405) and the National Natural Science Foundation of China (41102115 and 40930106). The authors are grateful to two anonymous referees for critical comments and valuable suggestions and Dr. Tan Xiaodong for polishing English.
摘要: The southeastern Chinese Loess Plateau is the terminal deposition area of dusts transported by the East Asian winter monsoon and the frontal area penetrated by the East Asian summer monsoon, and thus a climate sensitive region. This paper reports a rock magnetic study of a Quaternary loess-paleosol section in such a region. We tried to reconstruct the paleoclimate evolution history in the region during 1.95-0.40 Ma with magnetic parameters. The results show a general up-section decreasing trend of the ratio of HIRM/(SIRM-IRM100 mT), indicating a long-term decreasing trend of hematite coercivities in the deposits, which can be mainly related to the cooling and aridification trend of the environment in interglacial depositional area and glacial dust source region. The ratio, chi (lf)/chi (ARM), widely used to reflect the variations of magnetic mineral grain size, manifests a long-term increasing trend of the magnetic mineral grain size and tends to indicate an overall weakening trend of the East Asian summer monsoon that controlled the pedogenic intensity. Although the regional multi-segmented paleoclimatic records revealed by several magnetic parameters in our study, the long-term Asian cooling and aridification trend inferred here is of global correlation significance.
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000325126500007
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/11112
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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[Wu Yi] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China; [Wu Yi; Zhu ZhaoYu; Qiu ShiFan] Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Marginal Sea Geol, Guangzhou 510640, Guangdong, Peoples R China; [Rao ZhiGuo] Lanzhou Univ, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou 730000, Peoples R China.A rock magnetic record of Asian cooling and aridification processes during 1.95-0.40 Ma in the southeastern Chinese Loess Plateau,CHINESE SCIENCE BULLETIN,2013,58(30):3636-3644
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