Sources, distributions, and burial efficiency of terrigenous organic matter in surface sediments from the Yellow River mouth, northeast China

doi:10.1016/j.orggeochem.2017.12.009

	Sources, distributions, and burial efficiency of terrigenous organic matter in surface sediments from the Yellow River mouth, northeast China
	Sun, Dayang 1; Tang, Jianhui2 ; He, Yuxin 1; Liao, Weisen 1,3; Sun, Yongge 1
发表期刊	ORGANIC GEOCHEMISTRY
ISSN	0146-6380
	2018-04-01
卷号	118 页码:89-102
关键词	Surface Sediments Terrigenous Organic Carbon Soil Organic Carbon Fossil Organic Carbon Burial Efficiency The Yellow River Mouth
DOI	10.1016/j.orggeochem.2017.12.009
英文摘要	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.
文章类型	Article
资助机构	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
语种	英语
关键词[WOS]	N-ALKANES ; SUSPENDED SEDIMENT ; BOHAI SEA ; ISOTOPIC FRACTIONATION ; OCEAN SEDIMENTS ; CARBON INPUTS ; ARCTIC-OCEAN ; TRANSPORT ; HYDROCARBONS ; ESTUARY
研究领域[WOS]	Geochemistry & Geophysics
WOS记录号	WOS:000428997900010
引用统计	被引频次：30[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	中国科学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
推荐引用方式 GB/T 7714	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.