Mineralogical control on REEs distributions in Co-rich crusts

Zhang Pingping; Chu Fengyou; Li Xiaohu

doi:10.3969/j.issn.0253-4193.2015.05.013

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Zhang Pingping, Chu Fengyou, Li Xiaohu. Mineralogical control on REEs distributions in Co-rich crusts[J]. Haiyang Xuebao, 2015, 37(5): 136-147. doi: 10.3969/j.issn.0253-4193.2015.05.013

Citation:

Zhang Pingping, Chu Fengyou, Li Xiaohu. Mineralogical control on REEs distributions in Co-rich crusts[J]. Haiyang Xuebao, 2015, 37(5): 136-147. doi: 10.3969/j.issn.0253-4193.2015.05.013

Zhang Pingping, Chu Fengyou, Li Xiaohu. Mineralogical control on REEs distributions in Co-rich crusts[J]. Haiyang Xuebao, 2015, 37(5): 136-147. doi: 10.3969/j.issn.0253-4193.2015.05.013

Citation:

Zhang Pingping, Chu Fengyou, Li Xiaohu. Mineralogical control on REEs distributions in Co-rich crusts[J]. Haiyang Xuebao, 2015, 37(5): 136-147. doi: 10.3969/j.issn.0253-4193.2015.05.013

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Mineralogical control on REEs distributions in Co-rich crusts

doi: 10.3969/j.issn.0253-4193.2015.05.013

1.
Laboratory of Submarine Geosciences, State Oceanic Administration, Hangzhou 310012, China;Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;Ocean College, Zhejiang University, Hangzhou 310058, China
2.
Laboratory of Submarine Geosciences, State Oceanic Administration, Hangzhou 310012, China;Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China

Received Date: 2014-04-18
Rev Recd Date: 2014-12-18

Abstract

Abstract

Rare earth elements (REEs) are important tracers for geochemical cycles,and are also world strategic resources. In this study,we investigated the mineral and REEs characteristics of Co-rich crusts from Johnston island to show that REEs distributions are constrained by their mineral compositions. On the basis of their mineral characteristics,the Co-rich crusts can be classified into type A,type B,and type C. The vernadite contents decrease from type A via type B to type C; and type B shows the highest apatite contents. Birnessite and todorokite are enriched in type C crust. Type A crusts are enriched in REE³⁺ and Ce,whereas type B crusts are characterized by high contents of Ce and Y. In type A crust,REE³ and Y that originated from seawater are specified adsorbed on the Fe-phase. Cerium is enriched in Mn-mineral via the oxidation from Ce³to Ce⁴ and separation from other REEs. In type B crust,REEs mainly form independent minerals,part of Ce and LREE³ are absorbed in the Fe-phase,and part of Y enter in apatite. In type C crust,REEs show the enrichment phenomena in Mn-minerals,and also part of Y are absorbed in apatite.
- Cobalt-rich crusts,
- rare earth elements,
- mineral assemblage,
- enriching machanism

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References(31)

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