Organic carbon oxidation and the associated pyrite formation in deep sediments at the Nankai subduction zone

doi:10.1016/j.marpetgeo.2024.107081

NIGPAS OpenIR

	Organic carbon oxidation and the associated pyrite formation in deep sediments at the Nankai subduction zone
通讯作者	Yao, Weiqi([email protected])
	Nan, Jingbo 1,2; Tsang, Man-Yin ; Yao, Weiqi 2,3
	2024-11-01
发表期刊	MARINE AND PETROLEUM GEOLOGY
ISSN	0264-8172
卷号	169 页码:7
摘要	The preservation of organic carbon (OC) in marine sediments is crucial for Earth's climate by sequestering CO2. 2 . While OC is mostly remineralized before it reaches the seafloor, a notable fraction is buried in deep-sea sediments, particularly at subduction zones known for their enhanced sedimentation rates that promote OC burial. The mechanisms behind OC recycling and decomposition within subduction zone sediments are governed by biologically mediated redox reactions involving a range of electron acceptors, which facilitate the sequential oxidation of OC. However, direct evidence regarding such effects on OC in deep sediments remains limited. In this study, we examine the contents of pyrite and trace metals of molybdenum (Mo), vanadium (V), and cesium (Cs) in organic-rich deep sediments from the Nankai subduction zone. We find that the pyrite, sulfate, diagenetic illite, and OC contents covary in Unit V, highlighting the important role of organoclastic sulfate reduction and biotic smectite-to-illite reaction at 60-70 degrees C in OC oxidation and pyrite formation. The profiles of Mo, V, and Cs also align with these processes in the same interval. Our findings contribute to an in-depth understanding of OC dynamics in subduction zones, emphasizing the complex interactions within deep sediments that may influence the global carbon cycle.
DOI	10.1016/j.marpetgeo.2024.107081
收录类别	SCI
语种	英语
关键词[WOS]	SULFATE REDUCTION ; ANAEROBIC OXIDATION ; ILLITE-SMECTITE ; CLAY-MINERALS ; METHANE ; MATTER ; ADSORPTION ; TROUGH ; DIAGENESIS ; FLUID
资助项目	National Key R&D Program of China[2022YFF0802900] ; NSFC[42376049] ; NSFC[42106069] ; NSFC[42472303] ; Guangdong Natural Science Foundation[2024A1515012537] ; Science and Technology Innovation Committee of Shenzhen Municipality[20231114150312001] ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS)[223120]
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001305556700001
项目资助者	National Key R&D Program of China ; NSFC ; Guangdong Natural Science Foundation ; Science and Technology Innovation Committee of Shenzhen Municipality ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS)
出版者	ELSEVIER SCI LTD
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/44277
专题	中国科学院南京地质古生物研究所
通讯作者	Yao, Weiqi
作者单位	1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China 2.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen 518055, Peoples R China 3.Univ Washington, Sch Oceanog, Seattle, WA 98195 USA
第一作者单位	中国科学院南京地质古生物研究所
推荐引用方式 GB/T 7714	Nan, Jingbo,Tsang, Man-Yin,Yao, Weiqi. Organic carbon oxidation and the associated pyrite formation in deep sediments at the Nankai subduction zone[J]. MARINE AND PETROLEUM GEOLOGY,2024,169:7.
APA	Nan, Jingbo,Tsang, Man-Yin,&Yao, Weiqi.(2024).Organic carbon oxidation and the associated pyrite formation in deep sediments at the Nankai subduction zone.MARINE AND PETROLEUM GEOLOGY,169,7.
MLA	Nan, Jingbo,et al."Organic carbon oxidation and the associated pyrite formation in deep sediments at the Nankai subduction zone".MARINE AND PETROLEUM GEOLOGY 169(2024):7.