Distribution and isotopic composition of foraminifera at cold-seep Site 973-4 in the Dongsha area, northeastern South China Sea

doi:10.1016/j.jseaes.2018.05.007

GIEC OpenIR

	Distribution and isotopic composition of foraminifera at cold-seep Site 973-4 in the Dongsha area, northeastern South China Sea
	Zhang, Bidong 1,2; Pan, Mengdi 1,2; Wu, Daidai1,2 ; Wu, Nengyou3,4
	2018-12-01
发表期刊	JOURNAL OF ASIAN EARTH SCIENCES
ISSN	1367-9120
卷号	168 页码:145-154
通讯作者	Wu, Daidai(wudd@ms.giec.ac.cn)
摘要	A 1375-cm-long gravity core (Site 973-4) was acquired from the Dongsha cold seep area of the northeastern South China Sea (SCS). We measured its stable isotopes of planktonic foraminifera and investigated benthic foraminiferal assemblage compositions. Accelerator mass spectrometry C-14 analysis of planktonic foraminifera shows that some intervals are dated to Marine Isotope Stage (MIS) 3. Pulleniatina obliquiloculata has positive delta C-13 (0.25-1.25 parts per thousand) except for a negative carbon isotopic excursion (up to delta C-13 = 1.15 parts per thousand), but its light -carbon sources remain elusive. The benthic delta C-13 values (Uvigerina) of non -seep and cold-seep boreholes from the SCS have no systematic difference. Therefore, the benthic delta C-13 at Site 973-4 did not record the enhanced seepage activities (if occurred) during the last sea-level lowstand in the Dongsha area. In the pre-Holocene sediments, the foraminiferal assemblages have lower diversities, Shannon-Wiener indices, evenness indices, Simpson indices and higher calcareous proportions like typical cold-seep settings. The changes in oxygen levels (lower in the glacial period than those in the Holocene) indicated by foraminiferal indices reflect either bottom-water oxygen variations on the glacial-interglacial scale or enhanced seepage activities during the last glacial period.
关键词	Foraminifera Assemblage Stable isotopes Cold seep The South China Sea
DOI	10.1016/j.jseaes.2018.05.007
关键词[WOS]	ORGANIC-CARBON FLUX ; LIVING BENTHIC FORAMINIFERA ; DEEP-WATER PALEOCEANOGRAPHY ; MODERN METHANE SEEPS ; CONTINENTAL-SLOPE ; COMMUNITY STRUCTURE ; DISSOLVED-OXYGEN ; HYDROCARBON-SEEP ; ADRIATIC SEA ; INDIAN-OCEAN
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41273022] ; CNPC-CAS science and technology cooperation project[2015A-4813] ; China Geological Survey[GHZ2012006003]
WOS研究方向	Geology
项目资助者	National Natural Science Foundation of China ; CNPC-CAS science and technology cooperation project ; China Geological Survey
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000452945000015
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/29802
专题	中国科学院广州能源研究所
通讯作者	Wu, Daidai
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China 3.Minist Land & Resources, Key Lab Gas Hydrate, Qingdao Inst Marine Geol, Qingdao 266071, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266071, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Zhang, Bidong,Pan, Mengdi,Wu, Daidai,et al. Distribution and isotopic composition of foraminifera at cold-seep Site 973-4 in the Dongsha area, northeastern South China Sea[J]. JOURNAL OF ASIAN EARTH SCIENCES,2018,168:145-154.
APA	Zhang, Bidong,Pan, Mengdi,Wu, Daidai,&Wu, Nengyou.(2018).Distribution and isotopic composition of foraminifera at cold-seep Site 973-4 in the Dongsha area, northeastern South China Sea.JOURNAL OF ASIAN EARTH SCIENCES,168,145-154.
MLA	Zhang, Bidong,et al."Distribution and isotopic composition of foraminifera at cold-seep Site 973-4 in the Dongsha area, northeastern South China Sea".JOURNAL OF ASIAN EARTH SCIENCES 168(2018):145-154.