The composition and geochemical significance of organic matters in surface sediments from the Southwest Sub-basin of the South China Sea

doi:10.1016/j.jseaes.2018.07.012

	The composition and geochemical significance of organic matters in surface sediments from the Southwest Sub-basin of the South China Sea
	Wan, Zhifeng 1,4; Wang, Xianqing 1; Li, Yongfang 1; Xu, Xing 3; Sun, Yuefeng 4; Yin, Zhengxin 5; Guan, Hongxiang 2
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2019-03-01
卷号	171 页码:103-117
关键词	Surface sediments Organic matter Aliphatic hydrocarbons Fatty acids Alcohols Southwest Sub-basin of the South China Sea
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2018.07.012
通讯作者	Guan, Hongxiang(guanhx@ms.giec.ac.cn)
英文摘要	Information about ocean evolution and material-energy exchange between the ocean and surrounding continents can be preserved in marine sediments. The Southwest Sub-basin, located among the Xisha Islands, the Zhongsha Islands, and the Nansha Islands, is an ideal tectonic unit to analyze the sedimentary environments of the South China Sea. In this paper, the distribution patterns of lipid biomarkers and their compound-specific stable carbon isotopes in surface sediments from the Southwest Sub-basin of the South China Sea were analyzed. Lipid biomarkers are composed of different proportions of aliphatic hydrocarbons, carboxylic acids, alcohols and series of sterols, indicating that the organic matter of the Southwest Sub-basin was derived from marine bacteria, algae and terrestrial higher plants. The average concentration of total organic carbon (TOC) in the study samples was 0.5 +/- 0.16%. TOC, total n-alkanes, and total carboxylic acids (TFA) decreased gradually from the margins to the center of the sub-basin, whereas the content of total n-alkanols increased. The spatial distribution trends resulted from varying water depths and the contribution of terrestrial organic matter. The concentration of TFA and the TFA/TOC revealed that the accumulation of organic matter in this area was generally low. The strong correlation between TOC and TFA of surface sediments in the study area may be related to a balance between the ocean production and ocean deposition rates.
资助项目	National Nature Science Foundation of China[41776056] ; National Nature Science Foundation of China[91428205] ; National Nature Science Foundation of China[41473080] ; Science and Technology Program of Guangzhou[201607010214] ; Fundamental Research Funds for the Central Universities[17lgjc10] ; Geology Investigation Project of China Geological Survey[DD20160158] ; Geology Investigation Project of China Geological Survey[KD 20160208] ; Marine Science and Technology of South China Sea Branch, SOA[1619] ; China Scholarship Council
WOS关键词	FATTY-ACIDS ; HYDROCARBON CONSTITUENTS ; SURFICIAL SEDIMENTS ; WATER COLUMN ; N-PARAFFINS ; MARINE ; STEROLS ; LIPIDS ; BIOMARKERS ; MARKERS
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000460709300009
资助机构	National Nature Science Foundation of China ; Science and Technology Program of Guangzhou ; Fundamental Research Funds for the Central Universities ; Geology Investigation Project of China Geological Survey ; Marine Science and Technology of South China Sea Branch, SOA ; China Scholarship Council
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/24646]
专题	中国科学院广州能源研究所
通讯作者	Guan, Hongxiang
作者单位	1.Sun Yat Sen Univ, Sch Marine Sci, Guangdong Prov Key Lab Marine Resources & Coastal, Engn Lab Offshore Oil Explorat & Dev,Guangdong Hi, Guangzhou 510006, Guangdong, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China 3.Minist Land & Resources, Guangzhou Marine Geol Survey, Guangzhou 510075, Guangdong, Peoples R China 4.Texas A&M Univ, Dept Geol & Geophys, College Stn, TX 77843 USA 5.State Ocean Adm, South China Sea Marine Survey & Technol Ctr, Guangzhou 510275, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Wan, Zhifeng,Wang, Xianqing,Li, Yongfang,et al. The composition and geochemical significance of organic matters in surface sediments from the Southwest Sub-basin of the South China Sea[J]. JOURNAL OF ASIAN EARTH SCIENCES,2019,171:103-117.
APA	Wan, Zhifeng.,Wang, Xianqing.,Li, Yongfang.,Xu, Xing.,Sun, Yuefeng.,...&Guan, Hongxiang.(2019).The composition and geochemical significance of organic matters in surface sediments from the Southwest Sub-basin of the South China Sea.JOURNAL OF ASIAN EARTH SCIENCES,171,103-117.
MLA	Wan, Zhifeng,et al."The composition and geochemical significance of organic matters in surface sediments from the Southwest Sub-basin of the South China Sea".JOURNAL OF ASIAN EARTH SCIENCES 171(2019):103-117.