Geochemical sedimentary evidence from core 973-2 for methane activity near the Jiulong Methane Reef in the northern South China Sea

doi:10.1190/INT-2017-0001.1

GIEC OpenIR

	Geochemical sedimentary evidence from core 973-2 for methane activity near the Jiulong Methane Reef in the northern South China Sea
	Pan, Mengdi 1,2,3; Wu, Daidai1,2 ; Yang, Fei 1,2,3; Sun, Tiantian 1,2,4; Wu, Nengyou5,6 ; Liu, Lihua 1,2
	2018-02-01
发表期刊	INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION
ISSN	2324-8858
卷号	6 期号:1 页码:T163-T174
通讯作者	Pan, Mengdi(panmd@ms.giec.ac.cn)
摘要	The Jiulong Methane Reef, located on the northern slope of the South China Sea, is characterized by several features, such as bottom-simulating reflections and authigenic carbonates, which are indicative of methane seeps that are currently occurring as well as those that occurred in the past. However, to date, the effect that these methane seeps have on the sedimentary environment is not completely clear. To provide further insights into the biogeochemical processes involved in methane seeps, a 6.73 m piston core (973-2) was retrieved from this area in 2011 to perform an in-depth analysis. The chronology of the core has been established by AMS(14)C dating, and sedimentary events since the last glacial period have been recorded. The results indicate abnormally low abundance and diversity, as well as high infaunal percentages of benthic foraminiferal assemblages in the lower part of the core from 673 to 350 centimeters below the sea floor (cmbsf), indicating impacts from methane activities. Major elemental barium, bromine, and titanium, which serve as proxies of the paleoproductivity, organic contents, and terrestrial supply, respectively, are found to make little contribution in CaCO3 content. However, regardless of the factors mentioned above, the CaCO3 content is still higher in the lower part of core, indicating the presence of authigenic carbonates. In addition, the total organic carbon/total sulfur ratios of less than 400 cmbsf are found to be beyond the normal range, which is 2.8 +/- 0.8, reflecting the effects of methane oxidation. In one of the sections, the trace metals and molybdenum profiles show enrichments that are closely related to those of the methane seeps. The results indicate that this area experienced methane seep events in the last glacial period.
DOI	10.1190/INT-2017-0001.1
关键词[WOS]	BENTHIC FORAMINIFERAL RESPONSE ; GAS HYDRATE OCCURRENCE ; ORGANIC-CARBON FLUX ; COLD-SEEP ; DEEP-SEA ; ANAEROBIC OXIDATION ; CONTINENTAL-SLOPE ; MARINE-SEDIMENTS ; DISSOLVED-OXYGEN ; HYDROCARBON SEEP
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41273022] ; CNPC-CAS Science and Technology Cooperation Project[2015A-4813] ; China Geological Survey Project[GHZ 2012006003] ; Youth Innovation Promotion Association CAS[2014321]
WOS研究方向	Geochemistry & Geophysics
项目资助者	National Natural Science Foundation of China ; CNPC-CAS Science and Technology Cooperation Project ; China Geological Survey Project ; Youth Innovation Promotion Association CAS
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000443642000004
出版者	SOC EXPLORATION GEOPHYSICISTS
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/23773
专题	中国科学院广州能源研究所
通讯作者	Pan, Mengdi
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou, Guangdong, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou, Guangdong, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Zhejiang Univ, Ocean Coll, Hangzhou, Zhejiang, Peoples R China 5.Minist Land & Resources, Key Lab Gas Hydrate, Qingdao Inst Marine Geol, Qingdao, Peoples R China 6.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Pan, Mengdi,Wu, Daidai,Yang, Fei,et al. Geochemical sedimentary evidence from core 973-2 for methane activity near the Jiulong Methane Reef in the northern South China Sea[J]. INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION,2018,6(1):T163-T174.
APA	Pan, Mengdi,Wu, Daidai,Yang, Fei,Sun, Tiantian,Wu, Nengyou,&Liu, Lihua.(2018).Geochemical sedimentary evidence from core 973-2 for methane activity near the Jiulong Methane Reef in the northern South China Sea.INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION,6(1),T163-T174.
MLA	Pan, Mengdi,et al."Geochemical sedimentary evidence from core 973-2 for methane activity near the Jiulong Methane Reef in the northern South China Sea".INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION 6.1(2018):T163-T174.