Insights Into a Correlation Between Magnetotactic Bacteria and Polymetallic Nodule Distribution in the Eastern Central Pacific Ocean

doi:10.1029/2024JB029062

	Insights Into a Correlation Between Magnetotactic Bacteria and Polymetallic Nodule Distribution in the Eastern Central Pacific Ocean
	Liu, Yan1,2,3,4 ; Liu, Shuangchi 4,5; Piedrahita, Victor A.1; Liu, Peiyu 1,2,3,4; He, Shi 6; Pan, Hongmiao 7; Dong, Yi 7; Roberts, Andrew P.8; Feng, Lianjun 1; Tang, Zihua 4,9; Xiao, Tian 7; Pan, Yongxin 4,10; Li, Jinhua 1,2,4
	2024-08-01
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
ISSN	2169-9313
卷号	129 期号:8 页码:15
通讯作者	Li, Jinhua([email protected])
摘要	The Clarion-Clipperton Fracture Zone (CCFZ) in the eastern central Pacific Ocean is the world's largest area for potential deep-sea polymetallic nodule mining and is attracting increased scientific and commercial interest. Recent studies indicate that biogenic magnetite, generated intracellularly by magnetotactic bacteria (MTB), can carry a biogeochemical remanent magnetization in polymetallic nodules, although whether biogenic or physical-chemical processes are responsible for nodule formation remain poorly constrained. Here, we report a combination of magnetic, electron microscope and geochemical analyses on seafloor surface sediments from the eastern CCFZ to understand the spatial distribution of biogenic magnetite and possible relationships between MTB and polymetallic nodules. Experimental results indicate that sedimentary magnetic minerals from the northern and southern regions are dominated by detrital (eolian loess and volcanic material) and biogenic magnetic minerals (magnetosomes), respectively. Sediments from the intermediate region contain both detrital and biogenic magnetic minerals. Quantitative first-order reversal curve-principal component analysis indicates that biogenic magnetite has the highest concentration in the intermediate CCFZ region, coincident with the highest polymetallic nodule density. Combined with previous research, we speculate that MTB growth on the CCFZ seafloor is driven mainly by local redox conditions. Manganese nodule surfaces are rich in organic biofilms, which results in a relatively thick oxic-anoxic transition zone in high-abundance manganese nodule regions, which generates an optimal microenvironment for both MTB growth and magnetite biomineralization. This study provides new clues for understanding the ecological distribution of MTB and the biogeochemical remanent magnetization recorded by biogenic magnetite in deep-sea sediments. Polymetallic nodules are an important seafloor resource because they contain economically important minerals (e.g., Ni, Co, and Mn) that are not common on land. Hence, there is increased economic and scientific interest in understanding the formation mechanisms of these materials. Several studies indicate that biogenic magnetite crystals produced by magnetotactic bacteria (MTB) occur within polymetallic nodules. Testing the relationship between MTB abundance and polymetallic nodule distribution can help to better understand how these materials formed. Here, we study seafloor sediments from the Clarion-Clipperton Fracture Zone (CCFZ) and find that they mainly contain biogenic and detrital magnetic minerals. Detrital magnetic minerals come from volcanic chains and eolian dust, while biogenic magnetite forms within bacterial cells. We find that increased biogenic magnetite abundance coincides with higher polymetallic nodule occurrences in the CCFZ. This implies that MTB activity may play a significant role in the formation and growth of polymetallic nodules. Biogenic and detrital magnetic minerals are quantified in seafloor surface sediments from the Clarion-Clipperton Fracture Zone Biogenic magnetite concentrations and polymetallic nodule density are increased in the central Clarion-Clipperton Fracture Zone Polymetallic nodule growth likely produced reducing, organic-rich microenvironments suitable for magnetotactic bacteria
关键词	Eastern central Pacific Ocean polymetallic nodules detrital magnetic minerals biogenic magnetite biogeochemical remanent magnetization deep-sea magnetotactic bacteria
DOI	10.1029/2024JB029062
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42225402]; National Natural Science Foundation of China[41920104009]; National Natural Science Foundation of China[42388101]; Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai, China)[311022004]; Key Research Program of the Institute of Geology and Geophysics, CAS[IGGCAS-202202]; International Postdoctoral Exchange Fellowship Program-Talent Introduction Program of the Chinese Academy of Science; Australian Research Council[DP200100765]
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:001296052500001
出版者	AMER GEOPHYSICAL UNION
WOS关键词	REVERSAL CURVE DIAGRAMS ; ORGANIC-CARBON FLUX ; MANGANESE NODULES ; DEEP-SEA ; MAGNETIC-PROPERTIES ; FERROMANGANESE NODULES ; PELAGIC SEDIMENTS ; ROCK MAGNETISM ; GRAIN-SIZE ; ORIGIN
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/198049
专题	海洋生态与环境科学重点实验室
通讯作者	Li, Jinhua
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Deep Petr Intelligent Explorat & Dev, Beijing, Peoples R China 2.Qingdao Marine Sci & Technol Ctr, Lab Marine Geol, Qingdao, Peoples R China 3.Southern Marine Sci & Engn Guangdong Lab, Zhuhai, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 6.Northwest Univ, Dept Geol, Xian, Peoples R China 7.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China 8.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia 9.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing, Peoples R China 10.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yan,Liu, Shuangchi,Piedrahita, Victor A.,et al. Insights Into a Correlation Between Magnetotactic Bacteria and Polymetallic Nodule Distribution in the Eastern Central Pacific Ocean[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2024,129(8):15.
APA	Liu, Yan.,Liu, Shuangchi.,Piedrahita, Victor A..,Liu, Peiyu.,He, Shi.,...&Li, Jinhua.(2024).Insights Into a Correlation Between Magnetotactic Bacteria and Polymetallic Nodule Distribution in the Eastern Central Pacific Ocean.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,129(8),15.
MLA	Liu, Yan,et al."Insights Into a Correlation Between Magnetotactic Bacteria and Polymetallic Nodule Distribution in the Eastern Central Pacific Ocean".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 129.8(2024):15.