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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
Source PublicationGEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
Volume16Issue:8Pages:2679-2693
SubtypeArticle
AbstractTo 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
Indexed BySCI
Language英语
WOS IDWOS:000362365600013
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/52401
Collection海洋地质与环境重点实验室
Affiliation1.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
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
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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