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学科主题: Paleontology
题名: Stratigraphic distribution of the radiolarian Spongodiscus biconcavus Haeckel at IODP Site U1340 in the Bering Sea and its paleoceanographic significance
作者: Chen, MH ; Zhang, Q ; Zhang, LL ; Zarikian, CA ; Wang, RJ
通讯作者: mhchen@scsio.ac.cn ; zhang_qiang6142@yahoo.com.cn ; llzhang@scsio.ac.cn ; zarikian@iodp.tamu.edu ; rjwangk@online.sh.cn
关键词: Radiolarian ; Spongodiscus biconcavus ; Paleoceanography ; NHG ; Bering Sea ; Integrated Ocean Drilling Program (IODP) Site U1340
刊名: PALAEOWORLD
发表日期: 2014
卷: 23, 期:1, 页:90-104
收录类别: sci
部门归属: [Chen, Mu-Hong ; Zhang, Qiang ; Zhang, Lan-Lan] Chinese Acad Sci, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China ; [Zarikian, Carlos Alvarez] Texas A&M Univ, College Stn, TX 77845 USA ; [Wang, Ru-Jian] Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China
项目归属: 海洋地质
资助者: NSFC [41076026, 40906030, 41030859]; National Key Project for Basic Research of China [2013CB956102]
摘要: The temporal and spatial distributions of the radiolarian species Spongodiscus biconcavus Haeckel are investigated to understand the paleoceanographic evolution of the Bering Sea region during the last 4.3 Myr based on extensive study of samples collected at Site U1340 during the IODP Expedition 323. The biostratigraphic resolution for the region is also improved by multidisciplinary studies of radiolarians, diatoms, dinoflagellates, ebridians, and silicoflagellates. The results demonstrate that the abundance variation of S. biconcavus during the last 4.3 Myr is closely related to global climate changes, and the species can be used as a warm water and climate proxy in the Bering Sea. Based on the downhole profiles of S. biconcavus and other parameters, we conclude that the southern Bering Sea was associated with a warm water mass prior to 3.147 Ma but it gradually cooled thereafter. From 2.793 Ma to 0.889 Ma, a cold water mass and sea-ice predominated in the Bering Sea, in response to the early Northern Hemisphere glaciation (NHG). Furthermore, the climate suddenly became much cooler post 0.889 Ma. Nevertheless, a reversal of this cooling trend occurred after the Mid-Pleistocene Climatic Transition (-1.2 Ma), marked by reoccurrence of warm water and reduced sea-ice in the Bering Sea until the final retreat of warm water mass from the Bering Sea after 0.239 Ma. These processes are correlated with biogeographic expansion and retreat of warm water planktonic species. (C) 2013 Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. All rights reserved.
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WOS记录号: WOS:000332271400007
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10642
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Recommended Citation:
Chen, MH; Zhang, Q; Zhang, LL; Zarikian, CA; Wang, RJ.Stratigraphic distribution of the radiolarian Spongodiscus biconcavus Haeckel at IODP Site U1340 in the Bering Sea and its paleoceanographic significance,PALAEOWORLD,2014,23(1):90-104
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