Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/NGEO2900 |
Iron persistence in a distal hydrothermal plume supported by dissolved-particulate exchange | |
Fitzsimmons, Jessica N.1,2; John, Seth G.3,4; Marsay, Christopher M.4,5; Hoffman, Colleen L.6; Nicholas, Sarah L.7,8; Toner, Brandy M.6,7; German, Christopher R.9; Sherrell, Robert M.1,10 | |
2017-03-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Ireland |
英文摘要 | Hydrothermally sourced dissolved metals have been recorded in all ocean basins. In the oceans' largest known hydrothermal plume, extending westwards across the Pacific from the Southern East Pacific Rise, dissolved iron and manganese were shown by the GEOTRACES program to be transported halfway across the Pacific. Here, we report that particulate iron and manganese in the same plume also exceed background concentrations, even 4,000 km from the vent source. Both dissolved and particulate iron deepen by more than 350 m relative to(3)He-a non-reactive tracer of hydrothermal input-crossing isopycnals.Manganese shows no similar descent. Individual plume particle analyses indicate that particulate iron occurs within low-density organic matrices, consistent with its slow sinking rate of 5-10 m yr(-1). Chemical speciation and isotopic composition analyses reveal that particulate iron consists of Fe( III) oxyhydroxides, whereas dissolved iron consists of nanoparticulate Fe( III) oxyhydroxides and an organically complexed iron phase. The descent of plume-dissolved iron is best explained by reversible exchange onto slowly sinking particles, probably mediated by organic compounds binding iron. We suggest that in ocean regimes with high particulate iron loadings, dissolved iron fluxes may depend on the balance between stabilization in the dissolved phase and the reversibility of exchange onto sinking particles. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000395791400011 |
WOS关键词 | FE ISOTOPE FRACTIONATION ; EAST PACIFIC RISE ; DEEP CIRCULATION ; ORGANIC-CARBON ; TRACE-METALS ; OCEAN ; SEAWATER ; NANOPARTICLES ; PARTICLES ; TRANSPORT |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/34819 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Rutgers State Univ, Dept Marine & Coastal Sci, New Brunswick, NJ 08901 USA; 2.Texas A&M Univ, Dept Oceanog, College Stn, TX 77843 USA; 3.Univ Southern Calif, Dept Earth Sci, Los Angeles, CA 90089 USA; 4.Univ South Carolina, Dept Earth & Ocean Sci, Columbia, SC 29208 USA; 5.Univ Georgia, Skidaway Inst Oceanog, Savannah, GA 31411 USA; 6.Univ Minnesota Twin Cities, Dept Earth Sci, Minneapolis, MN 55455 USA; 7.Univ Minnesota Twin Cities, Dept Soil Water & Climate, St Paul, MN 55108 USA; 8.Natl Univ Ireland, Dept Earth & Ocean Sci, Galway H91 TK33, Ireland; 9.Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA; 10.Rutgers State Univ, Dept Earth & Planetary Sci, Piscataway, NJ 08854 USA |
推荐引用方式 GB/T 7714 | Fitzsimmons, Jessica N.,John, Seth G.,Marsay, Christopher M.,et al. Iron persistence in a distal hydrothermal plume supported by dissolved-particulate exchange[J]. NATURE GEOSCIENCE,2017,10(3). |
APA | Fitzsimmons, Jessica N..,John, Seth G..,Marsay, Christopher M..,Hoffman, Colleen L..,Nicholas, Sarah L..,...&Sherrell, Robert M..(2017).Iron persistence in a distal hydrothermal plume supported by dissolved-particulate exchange.NATURE GEOSCIENCE,10(3). |
MLA | Fitzsimmons, Jessica N.,et al."Iron persistence in a distal hydrothermal plume supported by dissolved-particulate exchange".NATURE GEOSCIENCE 10.3(2017). |
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