Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Distribution and isotopic composition of foraminifera at cold-seep Site 973-4 in the Dongsha area, northeastern South China Sea | |
Zhang, Bidong1,2; Pan, Mengdi1,2; Wu, Daidai1,2 ; Wu, Nengyou3,4
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| 2018-12-01 | |
| Source Publication | JOURNAL OF ASIAN EARTH SCIENCES
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| ISSN | 1367-9120 |
| Volume | 168Pages:145-154 |
| Corresponding Author | Wu, Daidai(wudd@ms.giec.ac.cn) |
| Abstract | 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. |
| Keyword | Foraminifera Assemblage Stable isotopes Cold seep The South China Sea |
| DOI | 10.1016/j.jseaes.2018.05.007 |
| WOS Keyword | ORGANIC-CARBON FLUX ; LIVING BENTHIC FORAMINIFERA ; DEEP-WATER PALEOCEANOGRAPHY ; MODERN METHANE SEEPS ; CONTINENTAL-SLOPE ; COMMUNITY STRUCTURE ; DISSOLVED-OXYGEN ; HYDROCARBON-SEEP ; ADRIATIC SEA ; INDIAN-OCEAN |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[41273022] ; CNPC-CAS science and technology cooperation project[2015A-4813] ; China Geological Survey[GHZ2012006003] |
| WOS Research Area | Geology |
| Funding Organization | National Natural Science Foundation of China ; CNPC-CAS science and technology cooperation project ; China Geological Survey |
| WOS Subject | Geosciences, Multidisciplinary |
| WOS ID | WOS:000452945000015 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/29802 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Wu, Daidai |
| Affiliation | 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 |
| First Author Affilication | GuangZhou Institute of Energy Conversion,Chinese Academy of Sciences |
| Recommended Citation 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. |
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