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Enrichment mechanisms of rare earth elements in marine hydrogenic ferromanganese crusts 被引量:16
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作者 JIANG XueJun1,2,LIN XueHui1,2,YAO De3,4 & GUO WeiDong5 1 Key Laboratory of Marine Oil and Gas Resources and Marine Environment,Ministry of Land and Resources,Qingdao 266071,china 2 Qingdao Institute of Marine Geology,china Geological Survey,Qingdao 266071,china +2 位作者 3 Institute of Resources and Environment,Shandong university of Technology,Zibo 255049,china 4 Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,china 5 department of oceanography,xiamen university,xiamen 361005,china 《Science China Earth Sciences》 SCIE EI CAS 2011年第2期197-203,共7页
A series of selective extraction experiments were conducted on marine hydrogenic ferromanganese crusts from the seamount near the Line Island to investigate the distribution of rare earth elements (REEs) and the mec... A series of selective extraction experiments were conducted on marine hydrogenic ferromanganese crusts from the seamount near the Line Island to investigate the distribution of rare earth elements (REEs) and the mechanisms of combination between REEs and the hydrogenic ferromanganese crusts. The enrichment of REEs in hydrogenic ferromanganese crusts is attributed mainly to the mineral or oxide/hydroxide of the crust rather than the growth environment. The REEs are present mainly in amorphous ferric oxide/hydroxide rather than in 6-MnO2. Amorphous ferric oxide/hydroxide preferentially combines free REE3+, while 6-MnO2 combines the REE-carbonate complexes in modern seawater. The REEs in seawater are combined more strongly with amorphous ferric oxide/hydroxides than with 6-MnO2. The positive Ce anomaly in hydrogenic ferromanganese crusts results from the oxidation of soluble Ce3+ to insoluble Ce4+ by the actively soluble oxygen of the bottom current rather than by the oxidation of δ-MnO2. 展开更多
关键词 rare earth elements hydrogenic ferromanganese crust selective extraction experiment GEOCHEMISTRY combinationmechanism
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