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  5. 深海地质与地球化学研究室
Subduction of sedimentary carbonate in the Mariana trench

文献类型：期刊论文

作者Liu, S.2; Su, X.1; Wan, S.1; Zhang, L.1; Chen, S.2; Xu, W.2; Xu, H.2; Wang, D.2; Li, D.2; Peng, X.2
刊名GEOCHEMICAL PERSPECTIVES LETTERS
出版日期2024-06-26
卷号31页码:8-13
ISSN号2410-339X
DOI10.7185/geochemlet.2425
英文摘要Calcium carbonate is a major component of shallow marine sediments but is rarely preserved in deep sea environments below the calcite compensation depth (CCD). In this study, we present evidence of sedimentary carbonate on the subducting Pacific plate of the Mariana Trench at a water depth ranging from 6675 to 10,813 m, far surpassing the local CCD of 4800 m. These deposits consist of well-preserved calcareous nannofossils, planktonic foraminifera, and siliceous radiolarians. Fossil assemblages and isotope stratigraphy analyses constrain the age of carbonate sediments to 17.6-13.5 Ma. We propose that the calcareous sediments originated from rapid deposition and burial on the seafloor above the CCD during the Miocene. Subsequently, they were into the hadal zone with the subduction of the Pacific Plate and exposed due to the excavation of extensive subducting-related normal faults within the subducting plate. This study implies that sedimentary carbonate may be a key component of subducting carbon at the hadal subduction zones, which has important implications for evaluating global carbon input fluxes at these zones.
WOS关键词COMPENSATION DEPTH ; ZONES ; OCEAN
资助项目National Key R&D Program of China[2022YFC2805400] ; Hadal Science and Technology Program[183446KYSB20210002] ; Youth Talent Fund from the Chinese Academy of Sciences Guangzhou Branch ; Guangdong Basic and Applied Basic Research Foundation[2023A1515011955]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:001296413500001
出版者EUROPEAN ASSOC GEOCHEMISTRY
资助机构National Key R&D Program of China ; Hadal Science and Technology Program ; Youth Talent Fund from the Chinese Academy of Sciences Guangzhou Branch ; Guangdong Basic and Applied Basic Research Foundation
源URL[http://ir.idsse.ac.cn/handle/183446/11441]  
专题深海科学研究部_深海地质与地球化学研究室
专家咨询委员会
通讯作者Peng, X.
作者单位1.Chinese Acad Sci, South China Sea Inst Oceanol, Guangzhou 510301, Peoples R China
2.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
推荐引用方式
GB/T 7714		 Liu, S.,Su, X.,Wan, S.,et al. Subduction of sedimentary carbonate in the Mariana trench[J]. GEOCHEMICAL PERSPECTIVES LETTERS,2024,31:8-13.
APA Liu, S..,Su, X..,Wan, S..,Zhang, L..,Chen, S..,...&Peng, X..(2024).Subduction of sedimentary carbonate in the Mariana trench.GEOCHEMICAL PERSPECTIVES LETTERS,31,8-13.
MLA Liu, S.,et al."Subduction of sedimentary carbonate in the Mariana trench".GEOCHEMICAL PERSPECTIVES LETTERS 31(2024):8-13.

入库方式： OAI收割

来源：深海科学与工程研究所

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