DOI: 10.1016/j.epsl.2018.01.016
Scopus记录号: 2-s2.0-85044363264
论文题名: Rare earth element distributions in the West Pacific: Trace element sources and conservative vs. non-conservative behavior
作者: Behrens M.K. ; Pahnke K. ; Paffrath R. ; Schnetger B. ; Brumsack H.-J.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 486 起始页码: 166
结束页码: 177
语种: 英语
英文关键词: GEOTRACES
; rare earth elements
; West Pacific
Scopus关键词: Dissolution
; Heterojunctions
; Mixing
; Oceanography
; Rare earth elements
; Rare earths
; Surface waters
; Tropics
; Antarctic intermediate waters
; Dissolved rare earth elements
; Europium anomalies
; GEOTRACES
; Hydrothermal plume
; Multiparameter analysis
; Subsurface waters
; West pacific
; Trace elements
; concentration (composition)
; europium
; fractionation
; hydrothermal plume
; mixing
; rare earth element
; spatial distribution
; trace element
; Fiji
; Lau Basin
; Pacific Ocean
; Pacific Ocean (West)
; Papua New Guinea
; South Korea
; Tonga
英文摘要: Recent studies suggest that transport and water mass mixing may play a dominant role in controlling the distribution of dissolved rare earth element concentrations ([REE]) at least in parts of the North and South Atlantic and the Pacific Southern Ocean. Here we report vertically and spatially high-resolution profiles of dissolved REE concentrations ([REE]) along a NW–SE transect in the West Pacific and examine the processes affecting the [REE] distributions in this area. Surface water REE patterns reveal sources of trace element (TE) input near South Korea and in the tropical equatorial West Pacific. Positive europium anomalies and middle REE enrichments in surface and subsurface waters are indicative of TE input from volcanic islands and fingerprint in detail small-scale equatorial zonal eastward transport of TEs to the iron-limited tropical East Pacific. The low [REE] of North and South Pacific Tropical Waters and Antarctic Intermediate Water are a long-range (i.e., preformed) laterally advected signal, whereas increasing [REE] with depth within North Pacific Intermediate Water result from release from particles. Optimum multiparameter analysis of deep to bottom waters indicates a dominant control of lateral transport and mixing on [REE] at the depth of Lower Circumpolar Deep Water (≥3000 m water depth; ∼75–100% explained by water mass mixing), allowing the northward tracing of LCDW to ∼28°N in the Northwest Pacific. In contrast, scavenging in the hydrothermal plumes of the Lau Basin and Tonga-Fiji area at 1500–2000 m water depth leads to [REE] deficits (∼40–60% removal) and marked REE fractionation in the tropical West Pacific. Overall, our data provide evidence for active trace element input both near South Korea and Papua New Guinea, and for a strong lateral transport component in the distribution of dissolved REEs in large parts of the West Pacific. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110029
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Max Planck Research Group for Marine Isotope Geochemistry, Institute for Chemistry and Biology of the Marine Environment (ICBM), University of Oldenburg, Carl-von-Ossietzky-Str. 9-11, Oldenburg, 26129, Germany; Microbiogeochemistry, Institute for Chemistry and Biology of the Marine Environment (ICBM), University of Oldenburg, Carl-von-Ossietzky-Str. 9-11, Oldenburg, 26129, Germany
Recommended Citation:
Behrens M.K.,Pahnke K.,Paffrath R.,et al. Rare earth element distributions in the West Pacific: Trace element sources and conservative vs. non-conservative behavior[J]. Earth and Planetary Science Letters,2018-01-01,486