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Geochemical and molecular characteristics of ferromanganese deposits and surrounding sediments in the Mariana Trench: An Implication for the geochemical Mn cycle in sedimentary environments of the trench zone

文献类型：期刊论文

作者Li, Jiwei1; Li, Ling1,2; Bai, Shijie1; Chen, Shun1,3; Xu, Hengchao1,3; Ta, Kaiwen1,3; Qu, Yuangao1; Wang, Yuguang4; Yao, Huiqiang5; Dong, Yanhui6,7
刊名GEOCHIMICA ET COSMOCHIMICA ACTA
出版日期2021-10-01
卷号310页码:155-168
ISSN号0016-7037
关键词Ferromanganese nodule Biogeochemical Mn cycle Microbial analysis Nodule formation Mariana Trench
DOI10.1016/j.gca.2021.07.018
英文摘要Trench systems are some of the most important geodynamic settings on Earth and have a substantial influence on the global metal cycle. Trench environments are affected not only by episodic deposition of volcanic ash, but also exhibit a continuous water-rock chemical exchange. Ferromanganese nodules, which are archives for the marine Mn cycle, were first discovered in the southern Mariana Trench during China's major 10,000-meter hadal trench scientific expedition in 2016. Nevertheless, their geochemical characteristics and formation mechanism in sedimentary environments of the trench zone remain enigmatic. In this study, these ferromanganese nodules and surrounding sediments were examined by geochemical and microbial methods. Bulk geochemistry indicated that trench nodules are characterized by high Mn/Fe ratios and nodule textures indicate a rapid growth rate, with Mn mainly from two sources: volcanic ash alteration and fluids discharge from the trench seabed. High-resolution in situ geochemical analysis categorized microlayers of an individual nodule into three types. Type I is the interior part that has a high Mn/Fe ratio (>20) and high growth rate (52.19-3571.73 mm/Myr), and formed by the influence of fluid discharge activities around this region. Type II is laminae from the exterior part that have a hydrogenetic origin with lower Mn/Fe ratio (0.01-2.50) and lower growth rate (4.54-9.86 mm/Myr). Type III is laminae from the exterior part that have a diagenetic origin with moderately high Mn/Fe ratio (2.5-15.0) and moderately high growth rate (12.40-18.93 mm/Myr). 16S rRNA gene sequence analysis revealed that the bacterial community structures in the nodule-bearing sediment samples, dominated by Shewanella and Colwellia, were substantially different from those of reference sediment samples. For the first time, we propose a conceptual model for a geochemical Mn cycle and nodule formation in trench sedimentary environments using both geochemical and microbial data. (C) 2021 Elsevier Ltd. All rights reserved.
WOS关键词BIOGENIC MANGANESE OXIDES ; MICROBIAL COMMUNITIES ; POLYMETALLIC NODULES ; MN(II) OXIDATION ; ORGANIC-CARBON ; SEA-FLOOR ; CRUSTS ; DEEP ; SERPENTINITES ; PLATE
资助项目National Key Research and Development Program of China[2017YFC0306604] ; National Natural Science Foundation of China[41876050] ; National Natural Science Foundation of China[41576038] ; National Natural Science Foundation of China[41906059] ; Youth Innovation Promotion Association CAS
WOS研究方向Geochemistry & Geophysics
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000689517700010
资助机构National Key Research and Development Program of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS
源URL[http://ir.idsse.ac.cn/handle/183446/8871]  
专题深海科学研究部_深海地质与地球化学研究室
深海科学研究部_地外海洋系统研究室
通讯作者Li, Jiwei; Peng, Xiaotong
作者单位1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
2.Minist Agr, Biogas Inst, Key Lab Dev & Applicat Rural Renewable Energy, Chengdu 610041, Peoples R China
3.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519082, Peoples R China
4.Cent South Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Hunan, Peoples R China
5.Minist Nat Resources, Guangzhou Marine Geol Survey, Key Lab Marine Mineral Resources, Guangzhou 510075, Peoples R China
6.Minist Nat Resources, Inst Oceanog 2, Hangzhou 310012, Peoples R China
7.Minist Nat Resources, Key Lab Submarine Geosci, Hangzhou 310012, Peoples R China
8.Minist Nat Resources, Inst Oceanog 3, Xiamen 361005, Peoples R China
推荐引用方式
GB/T 7714		 Li, Jiwei,Li, Ling,Bai, Shijie,et al. Geochemical and molecular characteristics of ferromanganese deposits and surrounding sediments in the Mariana Trench: An Implication for the geochemical Mn cycle in sedimentary environments of the trench zone[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2021,310:155-168.
APA Li, Jiwei.,Li, Ling.,Bai, Shijie.,Chen, Shun.,Xu, Hengchao.,...&Peng, Xiaotong.(2021).Geochemical and molecular characteristics of ferromanganese deposits and surrounding sediments in the Mariana Trench: An Implication for the geochemical Mn cycle in sedimentary environments of the trench zone.GEOCHIMICA ET COSMOCHIMICA ACTA,310,155-168.
MLA Li, Jiwei,et al."Geochemical and molecular characteristics of ferromanganese deposits and surrounding sediments in the Mariana Trench: An Implication for the geochemical Mn cycle in sedimentary environments of the trench zone".GEOCHIMICA ET COSMOCHIMICA ACTA 310(2021):155-168.

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来源：深海科学与工程研究所

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