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Occurrence phases of rare earth elements and platinum group elements in cobalt-rich crusts from the Seamount Xufu in the Pacific
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Jingjing Gao1, 2, Jihua Liu1, 2, *, Hui Zhang1, 2, Hongmin Wang1, 2, Jingjing Cui1, 2, Lianhua He1, 2
Haiyang Xuebao | 2021, 43(11) : 77 - 87
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Haiyang Xuebao | 2021, 43(11): 77-87
• Article •
Occurrence phases of rare earth elements and platinum group elements in cobalt-rich crusts from the Seamount Xufu in the Pacific
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Jingjing Gao1, 2, Jihua Liu1, 2, *, Hui Zhang1, 2, Hongmin Wang1, 2, Jingjing Cui1, 2, Lianhua He1, 2
Affiliations
  • 1Key Laboratory of Marine Geology and Metallogeny, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
  • 2Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
Published: 2021-11-25 doi: 10.12284/hyxb2021194
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The geochemistry, occurrence phase and enrichment mechanism of REE and PGE were studied in cobalt-rich crusts from the Seamount Xufu in the Pacific by ICP-OES, ICP-MS and phase analysis methods. The results showed that, REE and PGE were enriched in cobalt-rich crusts, REE contents were 1 842−2854 μg/g, and PGE contents were 144−1180 ng/g. REE and PGE contents in the old layers were higher than that in the new layers, and the phosphatization in the old layers might play an active role in the REE and PGE enrichment. Moreover, LREE contents were more than HREE contents, and REE diagrams showed the positive Ce anomalies and no Eu anomalies, so Ce was enriched in cobalt-rich crusts. Meanwhile, there was an obvious contrast between PGE, and PPGE contents were more than IPGE contents. PGE diagrams showed the positive Pt anomalies and negative Pd anomalies, so Pt was enriched and Pd was poor in cobalt-rich crusts. In addition, REE in the new layers were mainly enriched in the iron oxide phase, and the enrichment ratios were 65.40%−70.05%. While REE in the old layers were mainly enriched in the residual phase, and the enrichment ratios were 62.27%−65.77%, because it might be related to the phosphate. Meanwhile, PGE in the new or old layers were mainly enriched in the iron oxide phase, and the enrichment ratios were 63.66%−69.51%, and also the residual phase ranged from 29.20% to 34.68% had an impact on PGE enrichment. Therefore, REE and PGE enrichment were presumed to the iron oxide colloid particles adsorption. In the marine oxidative environment, the soluble Ce3+ and Pt2+ were oxidized to insoluble Ce4+ and Pt4+ respectively, and the precipitates were adsorbed into the iron oxide phase, so REE and PGE were enriched in cobalt-rich crusts.

the Pacific  /  cobalt-rich crusts  /  REE  /  PGE  /  occurrence phase
Jingjing Gao, Jihua Liu, Hui Zhang, Hongmin Wang, Jingjing Cui, Lianhua He. Occurrence phases of rare earth elements and platinum group elements in cobalt-rich crusts from the Seamount Xufu in the Pacific[J]. Haiyang Xuebao, 2021 , 43 (11) : 77 -87 . DOI: 10.12284/hyxb2021194
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Year 2021 volume 43 Issue 11
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Article Info
doi: 10.12284/hyxb2021194
  • Receive Date：2021-06-08
  • Online Date：2026-02-26
  • Published：2021-11-25
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  • Received：2021-06-08
  • Revised：2021-08-17
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    1Key Laboratory of Marine Geology and Metallogeny, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
    2Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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