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Factors affecting the rare earth element compositions in massive sulfides from deep-sea hydrothermal systems
Zeng, Zhigang1,2; Ma, Yao1,3; Yin, Xuebo1; Selby, David4; Kong, Fancui1; Chen, Shuai1
2015-09-01
发表期刊GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
卷号16期号:8页码:2679-2693
文章类型Article
摘要To reconstruct the evolution of ore-forming fluids and determine the physicochemical conditions of deposition associated with seafloor massive sulfides, we must better understand the sources of rare earth elements (REEs), the factors that affect the REE abundance in the sulfides, and the REE flux from hydrothermal fluids to the sulfides. Here we examine the REE profiles of 46 massive sulfide samples collected from seven seafloor hydrothermal systems. These profiles feature variable total REE concentrations (37.2-4092 ppb) and REE distribution patterns (La-CN/Lu-CN ratios = 2.00-73.8; (Eu/Eu*) CN ratios = 0.34-7.60). The majority of the REE distribution patterns in the sulfides are similar to those of vent fluids, with the sulfides also exhibiting light REE enrichment. We demonstrate that the variable REE concentrations, Eu anomalies, and fractionation between light REEs and heavy REEs in the sulfides exhibit a relationship with the REE properties of the sulfide-forming fluids and the massive sulfide chemistry. Based on the sulfide REE data, we estimate that modern seafloor sulfide deposits contain approximately 280 t of REEs. According to the flux of hydrothermal fluids at mid-ocean ridges (MORs) and an average REE concentration of 3 ng/g in these fluids, hydrothermal vents at MORs alone transport more REEs (>360 t) to the oceans over the course of just 2 years than the total quantity of REEs in seafloor sulfides. The excess REEs (i.e., the quantity not captured by massive sulfides) may be transported away from the systems and become bound in sulfate deposits and metalliferous sediments.
DOI10.1002/2015GC005812
收录类别SCI
语种英语
WOS记录号WOS:000362365600013
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/52401
专题海洋地质与环境重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, Seafloor Hydrothermal Act Lab, Key Lab Marine Geol & Environm, Qingdao, Peoples R China
2.Qingdao Collaborat Innovat Ctr Marine Sci & Techn, Qingdao, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China
4.Univ Durham, Dept Earth Sci, Durham, England
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GB/T 7714
Zeng, Zhigang,Ma, Yao,Yin, Xuebo,et al. Factors affecting the rare earth element compositions in massive sulfides from deep-sea hydrothermal systems[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2015,16(8):2679-2693.
APA Zeng, Zhigang,Ma, Yao,Yin, Xuebo,Selby, David,Kong, Fancui,&Chen, Shuai.(2015).Factors affecting the rare earth element compositions in massive sulfides from deep-sea hydrothermal systems.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,16(8),2679-2693.
MLA Zeng, Zhigang,et al."Factors affecting the rare earth element compositions in massive sulfides from deep-sea hydrothermal systems".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 16.8(2015):2679-2693.
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