Journal of Marine Sciences ›› 2023, Vol. 41 ›› Issue (2): 83-93.DOI: 10.3969/j.issn.1001-909X.2023.02.007

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Application of two-phase leaching method in the study of ferromanganese nodule mineralization

ZHU Feiyang1,2(), LI Huaiming1,2,3,*(), YAO Pengfei1,2, WANG Xiao1,2, ZHU Jihao1,2, LÜ Shihui4, LUO Yi5, ZHOU Li’na3, LIU Yuwei6, TANG Yutong1,2   

  1. 1. Key Laboratory of Submarine Geoscience, MNR, Hangzhou 310012, China
    2. Second Institute of Oceanography, MNR, Hangzhou 310012, China
    3. Beijing Pioneer High-technology Development Co., Ltd., Beijing 100081, China
    4. School of Ocean Sciences, China University of Geosciences (Beijing), Beijing 100083, China
    5. China Ocean Mineral Resources R&D Association, Beijing 100012, China
    6. Changsha Research Institute of Ming and Metallurgy Co., Ltd., Changsha 410012, China
  • Received:2022-01-30 Revised:2022-04-27 Online:2023-06-15 Published:2023-07-27


Two-phase leaching method can separate hydrogenetic and residual mineral phases of ferromanganese nodules, which will provide valuable information with the research of ferromanganese nodule mineralization and pale-environment. In order to study the applicability of the two-phase leaching method in the nodule mineralization research for different types of nodules compared to the bulk sample results, the ferromanganese nodules samples from six stations were selected, which were collected on the seamounts area of western Pacific Ocean and CC Zone of eastern Pacific Ocean, respectively. Geochemical and mineralogical compositions of the bulk samples were analyzed, and elements compositions of the hydrogenetic and residual mineral phases were analyzed, which were obtained using the two-phase leaching method. The results indicated that the mass ration variation of the residual mineral phases was not obvious with about 14.0%-17.6%, which had high contents of Nb, Rb, Ta, Ti, Zr. Contents and relevant rations of elements such as Co, Ni, Cu, Zn, Sr, REY in the hydrogenetic mineral phase showed similar features with those in the bulk samples. Proportion of elements contents like Ti, Nb, Sr between hydrogenetic and residual mineral phases showed well negative correlation with Mn/Fe values, which probably could be regarded as index for ferromanganese nodule mineralized environment research in the future.

Key words: two-phase leaching method, ferromanganese nodules, seamounts area of the western Pacific Ocean

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