Sources, distributions, and burial efficiency of terrigenous organic matter in surface sediments from the Yellow River mouth, northeast China
Sun, Dayang1; Tang, Jianhui2; He, Yuxin1; Liao, Weisen1,3; Sun, Yongge1
2018-04-01
发表期刊ORGANIC GEOCHEMISTRY
ISSN0146-6380
卷号118页码:89-102
摘要Organic geochemical studies of surface sediments from Laizhou Bay, the Yellow River mouth, northeast China, were conducted to reveal the sources, distributions, and burial efficiency of terrigenous OC exported by the Yellow River. Bulk OC contents and delta C-13(org) values from 204 samples show that terrigenous OC mainly accumulates in two muddy patches, basically controlled by hydrodynamic conditions. Distributions and stable carbon isotopic compositions of individual n-alkanes from 45 samples suggest that short-chain n-alkanes, with even carbon-number predominance, are most likely microbial products from degradation of riverine fossil OC, whereas long-chain odd-numbered n-alkanes (n-C-27, n-C-29 and n-C-31) and long-chain even-numbered n-alkanes (n-C-26, n-C-28 and n-C-30) are representative of riverine soil OC and fossil OC, respectively. Integrated with previous reports of similar to 100% burial efficiency of soil OC in the Yellow River mouth, concentration ratios of n-C27+29+31 to OC and n-C26+28+30 to n-C27+29+31 from the riverine particles to surface sediments in Laizhou Bay were constructed to indicate relative terrigenous OC contributions and fossil OC burial efficiency, respectively. The results suggest that the terrigenous OC contribution ranges from 14% to 57% in Laizhou Bay, with the highest values in the two muddy patches as well as in areas near the river mouth. The fossil OC burial efficiency ranges from 36% to 76%, with an TOC-weighted mean value of 42%. The 58% fossil OC lost during the transport and burial processes in the Yellow River mouth may provide a significant CO2 source. (C) 2018 Elsevier Ltd. All rights reserved.
关键词Surface Sediments Terrigenous Organic Carbon Soil Organic Carbon Fossil Organic Carbon Burial Efficiency The Yellow River Mouth
DOI10.1016/j.orggeochem.2017.12.009
项目资助者Zhejiang University ; Fundamental Research Funds for the Central Universities(2015QNA3017) ; Zhejiang Provincial Natural Science Foundation(LY15D030001) ; Natural Science Foundation of China(4130158)
收录类别SCI
关键词[WOS]N-ALKANES ; SUSPENDED SEDIMENT ; BOHAI SEA ; ISOTOPIC FRACTIONATION ; OCEAN SEDIMENTS ; CARBON INPUTS ; ARCTIC-OCEAN ; TRANSPORT ; HYDROCARBONS ; ESTUARY
文章类型Article
语种英语
WOS研究方向Geochemistry & Geophysics
WOS类目Geochemistry & Geophysics
WOS记录号WOS:000428997900010
出版者PERGAMON-ELSEVIER SCIENCE LTD
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cn/handle/133337/24034
专题中科院海岸带环境过程与生态修复重点实验室
通讯作者Sun, Yongge
作者单位1.Zhejiang Univ, Environm & Biogeochem Inst Ebig, Sch Earth Sci, Hangzhou 310027, Zhejiang, Peoples R China
2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Shandong, Peoples R China
3.Chinese Acad Sci, Guangzhou Inst Geochem, SKLOG, Guangzhou 510640, Guangdong, Peoples R China
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Sun, Dayang,Tang, Jianhui,He, Yuxin,et al. Sources, distributions, and burial efficiency of terrigenous organic matter in surface sediments from the Yellow River mouth, northeast China[J]. ORGANIC GEOCHEMISTRY,2018,118:89-102.
APA Sun, Dayang,Tang, Jianhui,He, Yuxin,Liao, Weisen,&Sun, Yongge.(2018).Sources, distributions, and burial efficiency of terrigenous organic matter in surface sediments from the Yellow River mouth, northeast China.ORGANIC GEOCHEMISTRY,118,89-102.
MLA Sun, Dayang,et al."Sources, distributions, and burial efficiency of terrigenous organic matter in surface sediments from the Yellow River mouth, northeast China".ORGANIC GEOCHEMISTRY 118(2018):89-102.
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