Transition metals in alkaline Lost City vent fluids are sufficient for early-life metabolisms
文献类型：期刊论文
| 作者 | Evans, Guy N.2; Ji, Shichao5,6; Kacar, Betul4; Anbar, Ariel D.1,3; Seyfried Jr, William E.2 |
| 刊名 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 出版日期 | 2024-11-15 |
| 卷号 | 385页码:61-73 |
| 关键词 | Alkaline hydrothermal vents Methanogenesis Nitrogen fixation Nickel Molybdenum Serpentine |
| ISSN号 | 0016-7037 |
| DOI | 10.1016/j.gca.2024.08.020 |
| 英文摘要 | Despite the importance of alkaline seafloor hydrothermal vents in broadening our understanding of deep-sea hydrothermal ecosystems, little is known about the mobility and concentrations of micronutrient transition metals in these environments. Here, we present new analyses of micronutrient transition metal concentrations in vent fluids from the iconic Lost City Hydrothermal Field (LCHF) and report concentrations of Fe = 2.9-18.3 mu mol/kg, Zn = 1.30-5.86 mu mol/kg, Cu = 0.43-5.06 mu mol/kg, Ni = 86.4-556 nmol/kg, Mn = 8.3-274 nmol/kg, V = 25.9-127 nmol/kg, Mo = 24-94 nmol/kg, Co = 8.0-135 nmol/kg, W = 4.8-16 nmol/kg, and Cd = 1.7-4.5 nmol/kg. We additionally present results of a hydrothermal lherzolite alteration experiment conducted at 300 degrees C, 500 bar. Transition metal concentrations and major chemical parameters of experimental reaction fluids are broadly similar to LCHF vent fluids, indicating that transition metal concentrations in LCHF vent fluids, and alkaline hydrothermal fluids more generally, reflect metal solubility controlled by underlying rock-buffered hydrothermal reactions. Concentrations of Ni and Mo are especially noteworthy because of their recognized importance for biological methanogenesis (Ni) and nitrogen fixation (Mo). When compared with known biological thresholds, our findings indicate that Ni concentrations in LCHF vent fluids are sufficient to support the robust methane-metabolizing microbial communities observed in the immediate vicinity of LCHF vents and suggest that Ni availability influences the spatial distribution of LCHF methanogens. Furthermore, our laboratory hydrothermal experiments demonstrate that Mo concentrations of similar magnitude to those observed in LCHF vent fluids (and also modern seawater) can be obtained by hydrothermal alteration of ultramafic rocks with Mo-free (Na, Ca) Cl aqueous solution. Thus, we conclude that alkaline hydrothermal fluids were likely similarly enriched in Mo prior to oxidation of the Earth's atmosphere and ocean, providing localized Mo-rich geochemical environments capable of supporting Mo-dependent nitrogen fixation at currently recognized threshold concentrations. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001345818400001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/81282]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Evans, Guy N. |
| 作者单位 | 1.Arizona State Univ, Sch Mol Sci, Tempe, AZ 85287 USA 2.Univ Minnesota, Dept Earth & Environm Sci, Minneapolis, MN 55455 USA 3.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA 4.Univ Wisconsin Madison, Dept Bacteriol, Madison, WI 53706 USA 5.Guangzhou Inst Geochem, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China 6.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Evans, Guy N.,Ji, Shichao,Kacar, Betul,et al. Transition metals in alkaline Lost City vent fluids are sufficient for early-life metabolisms[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2024,385:61-73. |
| APA | Evans, Guy N.,Ji, Shichao,Kacar, Betul,Anbar, Ariel D.,&Seyfried Jr, William E..(2024).Transition metals in alkaline Lost City vent fluids are sufficient for early-life metabolisms.GEOCHIMICA ET COSMOCHIMICA ACTA,385,61-73. |
| MLA | Evans, Guy N.,et al."Transition metals in alkaline Lost City vent fluids are sufficient for early-life metabolisms".GEOCHIMICA ET COSMOCHIMICA ACTA 385(2024):61-73. |
入库方式： OAI收割
来源：广州地球化学研究所
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