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Biogeochemical processes controlling authigenic carbonate formation within the sediment column from the Okinawa Trough
Li, Jiwei1; Peng, Xiaotong1; Bai, Shijie1; Chen, Zhiyan1,2; Van Nostrand, Joy D.3; Peng, Xiaotong(Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China)
2018-02-01
Source PublicationGEOCHIMICA ET COSMOCHIMICA ACTA
Volume222Pages:363-382
Contribution Rank第1完成单位 ; 第2完成单位 ; 第3完成单位
AbstractAuthigenic carbonates are one type of conspicuous manifestation in seep environments that can provide long-term archives of past seepage activity and methane cycling in the oceans. Comprehensive investigations of the microbial community functional structure and their roles in the process of carbonate formation are, however, lacking. In this study, the mineralogical, geochemical, and microbial functional composition were examined in seep carbonate deposits collected from the west slope of the northern section of the Okinawa Trough (OT). The aim of this work was to explore the correspondence between the mineralogical phases and microbial metabolism during carbonate deposit formation. The mineralogical analyses indicated that authigenic carbonate minerals (aragonite, magnesium-rich calcite, dolomite, ankerite and siderite) and iron-bearing minerals (limonite, chlorite, and biotite) were present in these carbonate samples. The carbon and oxygen isotopic values of the carbonate samples varied between -51.1% to -4.7% and -4.8% to 3.7%, respectively. A negative linear correlation between carbon and oxygen isotopic compositions was found, indicating a mixture of methane-derived diagenetic (low delta C-13/high O-18) carbonates and detrital origin (high delta C-13/low O-18) carbonates at the OT. GeoChip analyses suggested that various metabolic activities of microorganisms, including methanogenesis, methane oxidation, sulfite oxidation, sulfate reduction, and metal biotransformations, all occurred during the formation process. On the basis of these findings, the following model for the methane cycle and seep carbonate deposit formation in the sediment column at the OT is proposed: (1) in the upper oxidizing zone, aerobic methane oxidation was the main way of methane consumption; (2) in the sulfate methane transition zone, sulfate-dependent AOM (anaerobic oxidation of methane) consumes methane, and authigenic minerals such as aragonite, magnesium-calcite, and sulfide minerals precipitate; (3) in the underlying sulfate depleted zone, the presence of iron-oxides supplied by hydrothermal fluids and terrestrial inputs created thermodynamically favorable conditions for Fe-dependent AOM to consume methane, and dolomite and siderite/ankerite precipitate in this zone. (C) 2017 Elsevier Ltd. All rights reserved.
SubtypeArticle
KeywordSeep Carbonates Carbonate Mineralogy Geochip Microbial Community Functional Structure Okinawa Trough
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.gca.2017.10.029
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSOUTH CHINA SEA ; EASTERN MEDITERRANEAN SEA ; COLD SEEP CARBONATES ; EEL RIVER-BASIN ; NORTHERN CONTINENTAL-SLOPE ; BACK-ARC BASIN ; ANAEROBIC OXIDATION ; HYDROCARBON SEEPS ; METHANE-SEEPS ; MICROBIAL COMMUNITY
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000424972200021
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.idsse.ac.cn/handle/183446/5922
Collection深海科学研究部_深海地质与地球化学研究室
Corresponding AuthorPeng, Xiaotong; Peng, Xiaotong(Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China)
Affiliation1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
2.Univ Chinese Acad Sci, Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Oklahoma, Inst Environm Genom, Dept Microbiol & Plant Biol, Norman, OK 73019 USA
First Author AffilicationInstitute of Deep-sea Science and Engineering,CAS
Corresponding Author AffilicationInstitute of Deep-sea Science and Engineering,CAS
Recommended Citation
GB/T 7714
Li, Jiwei,Peng, Xiaotong,Bai, Shijie,et al. Biogeochemical processes controlling authigenic carbonate formation within the sediment column from the Okinawa Trough[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2018,222:363-382.
APA Li, Jiwei,Peng, Xiaotong,Bai, Shijie,Chen, Zhiyan,Van Nostrand, Joy D.,&Peng, Xiaotong.(2018).Biogeochemical processes controlling authigenic carbonate formation within the sediment column from the Okinawa Trough.GEOCHIMICA ET COSMOCHIMICA ACTA,222,363-382.
MLA Li, Jiwei,et al."Biogeochemical processes controlling authigenic carbonate formation within the sediment column from the Okinawa Trough".GEOCHIMICA ET COSMOCHIMICA ACTA 222(2018):363-382.
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