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Numerical modeling of early diagenetic processes in Haiyang 4 Area in the northern slope of the South China Sea
Liu, Lihua1; Luff, Roger2; Shao, Haibing3,4; Kolditz, Olaf3; Wu, Nengyou5,6
2017-07-01
Source PublicationENVIRONMENTAL EARTH SCIENCES
Volume76Issue:13
AbstractEarly diagenesis affects the distribution of solutes and minerals in unconsolidated sediments. The investigation of diagenesis is critical to understanding the geochemical transformation and benthic fluxes of elements. During the cruise mission SO-177 in 2004, gravity coring samples were recovered in the Haiyang 4 Area of the northern slope of the South China Sea (SCS). The geochemical concentrations in interstitial water were determined onboard. The 1D C.CANDI reactive transport software was used to model the early diagenesis processes at four sites: 56-GC-3, 70-GC-9, 94-GC-11, and 118-GC13. All of the simulations reproduced concentration profiles that matched the measurements with the implemented geochemical reactions. The degradation of organic carbon and anaerobic oxidation of methane (AOM) primarily determine the distribution of solutes in the working area. The degradation is active in the top 150 cm, and AOM is vigorous at depths below 200 cm. The local advective flux, sediment rate, and kinetic reaction constants of organic matter, methane and sulfate were calibrated based on the existing concentrations of pore water solutes. Geochemical reactions in this area occur in considerably deeper layers compared to depths cited in the literature. The model results provide evidence for the existence of deep hydrocarbon reservoirs that provide methane to the upper sediments.
SubtypeArticle
KeywordEarly Diagenesis Organic Matter Degradation Aom The norThern Slope Of The South Chinasea
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1007/s12665-017-6784-5
WOS Subject ExtendedEnvironmental Sciences & Ecology ; Geology ; Water Resources
WOS KeywordCARBONATE CRUST FORMATION ; COLD VENT SITES ; ORGANIC-CARBON ; SURFACE SEDIMENTS ; MARINE-SEDIMENTS ; HYDRATE RIDGE ; NUTRIENT DIAGENESIS ; ANAEROBIC OXIDATION ; SEASONAL-VARIATIONS ; CONTINENTAL-MARGIN
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China(41376076) ; Chinese Academy of Sciences(GJHZ1404)
WOS SubjectEnvironmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS IDWOS:000405283600008
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/14166
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China
2.Messnetzknoten Rendsburg, German Fed Off Radiat Protect, Rendsburg, Germany
3.UFZ Helmholtz Ctr Environm Res, Permoserstr 15, D-04318 Leipzig, Germany
4.Freiberg Univ Min & Technol, Freiberg, Germany
5.Qingdao Inst Marine Geol, Minist Land & Resources, Key Lab Gas Hydrate, Qingdao 266071, Peoples R China
6.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266071, Peoples R China
Recommended Citation
GB/T 7714
Liu, Lihua,Luff, Roger,Shao, Haibing,et al. Numerical modeling of early diagenetic processes in Haiyang 4 Area in the northern slope of the South China Sea[J]. ENVIRONMENTAL EARTH SCIENCES,2017,76(13).
APA Liu, Lihua,Luff, Roger,Shao, Haibing,Kolditz, Olaf,&Wu, Nengyou.(2017).Numerical modeling of early diagenetic processes in Haiyang 4 Area in the northern slope of the South China Sea.ENVIRONMENTAL EARTH SCIENCES,76(13).
MLA Liu, Lihua,et al."Numerical modeling of early diagenetic processes in Haiyang 4 Area in the northern slope of the South China Sea".ENVIRONMENTAL EARTH SCIENCES 76.13(2017).
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