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Late Neogene radiolarian absence event in the southern South China Sea and its paleoceanographic implication
Zhang, LL; Chen, MH; Lu, J; Xiang, R; Zhanglili1978108@163.com
2008
发表期刊PROGRESS IN NATURAL SCIENCE
ISSN1002-0071
卷号18期号:3页码:281-287
摘要Down-core variations of radiolarians at ODP Site 1143 in the southern South China Sea (SCS) are presented for the last 12 Myr. The fluctuations of radiolarian abundances since the Late Miocene can be divided into three stages: a high abundance stage at 12 - 5.96 Myr, a radiolarian absent stage at 5.96 - 3.30 Myr and a gradual increasing stage after 3.30 Myr. The three stages correspond to the forming and vicissitudes of the Western Pacific Warm Pool (WPWP) and the Eastern Asian Summer Monsoon (EASM). The radiolarian absence event (RAE) was also absent of diatom and occurred nearly simultaneously with the closures of the Panama Isthmus and the Indonesian seaway, which probably caused the reorganization of oceanic circulation systems. Accompanied this circulation reorganization was the weakening of the WPWP and the EASM, which probably led to a weakened upwelling in the southern SCS. In addition dissolved silica (Dsi) content in surface seawater might be very low during 5.96 - 3.30 Myr due to the "biogenic bloom" event, which consumed a large amount of Dsi in the surface seawater. All these factors together might lead to a great decrease of siliceous production in the southern SCS and consequently caused the RAE. Moreover, the dissolution of siliceous skeletons might also influence the abundance of radiolarians. (c) 2007 National Natural Science Foundation of China and Chinese Academy of Sciences. Published by Elsevier Limited and Science in China Press. All rights reserved.
部门归属[Zhang, Lili; Chen, Muhong; Zhang, Lanlan; Lu, Jun; Xiang, Rong] Chinese Acad Sci, S China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Peoples R China; [Zhang, Lili; Zhang, Lanlan] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
关键词Southern South China Sea Late Neogene Radiolarian Absence Event
学科领域Materials Science, Multidisciplinary ; Multidisciplinary Sciences
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收录类别sci
资助项目海洋地质
WOS记录号WOS:000254265800005
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文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/4572
专题中科院边缘海地质重点实验室
通讯作者Zhanglili1978108@163.com
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Zhang, LL,Chen, MH,Lu, J,et al. Late Neogene radiolarian absence event in the southern South China Sea and its paleoceanographic implication[J]. PROGRESS IN NATURAL SCIENCE,2008,18(3):281-287.
APA Zhang, LL,Chen, MH,Lu, J,Xiang, R,&Zhanglili1978108@163.com.(2008).Late Neogene radiolarian absence event in the southern South China Sea and its paleoceanographic implication.PROGRESS IN NATURAL SCIENCE,18(3),281-287.
MLA Zhang, LL,et al."Late Neogene radiolarian absence event in the southern South China Sea and its paleoceanographic implication".PROGRESS IN NATURAL SCIENCE 18.3(2008):281-287.
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