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Occurrence phase and enrichment mechanism of platinum group elements in the Pacific cobalt-rich crusts
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Jingjing Gao1, 2, Jihua Liu1, 2, *, Hui Zhang1, 2, Shijuan Yan1, 2, Lianhua He1, 2, Xiaojing Wang1, 2, Hongmin Wang1, 2
Haiyang Xuebao | 2019, 41(8) : 115 - 124
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Haiyang Xuebao | 2019, 41(8): 115-124
• Research Notes •
Occurrence phase and enrichment mechanism of platinum group elements in the Pacific cobalt-rich crusts
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Jingjing Gao1, 2, Jihua Liu1, 2, *, Hui Zhang1, 2, Shijuan Yan1, 2, Lianhua He1, 2, Xiaojing Wang1, 2, Hongmin Wang1, 2
Affiliations
  • 1 Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
  • 2 Laboratory for Marine Geology and Environment, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266061, China
Published: 2019-08-25 doi: 10.3969/j.issn.0253-4193.2019.08.011
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Selective chemical extraction method was utilized to fractionally extract platinum group elements (PGE) in cobalt-rich crusts from Caiwei Seamount in the Pacific, and PGE contents were determined by inductively coupled plasma mass spectrometry (ICP-MS). Occurrence phase analysis results in cobalt-rich crusts show that the PGE enrichments in different phases conform to the following order: iron oxide phase, residual phase, manganese oxide phase, carbonate phase, adsorbed phase. PGE in the new non-phosphate layers and the old phosphate layers are mainly enriched in the iron oxide phase, with the enrichment ratio from 59.26% to 82.19%, and the phosphate in residual phase has certain enrichment ability for PGE, with the enrichment ratio from 17.23% to 35.37%. Meanwhile, occurrence phase analysis results in different geological bodies show that the PGE enrichment in cobalt-rich crusts and seamount nodules is mainly affected by iron oxide phase and residual phase. In addition, the enrichment mechanism of PGE in cobalt-rich crusts is presumed to the iron oxide/iron hydroxides colloid particles adsorption, and the soluble $ {\rm PtCl}_4^{2-}$ in seawater is adsorbed into the iron oxide phase, so PGE are enriched in cobalt-rich crusts.

cobalt-rich crust  /  platinum group elements (PGE)  /  occurrence phase  /  enrichment mechanism  /  chemical extraction
Jingjing Gao, Jihua Liu, Hui Zhang, Shijuan Yan, Lianhua He, Xiaojing Wang, Hongmin Wang. Occurrence phase and enrichment mechanism of platinum group elements in the Pacific cobalt-rich crusts[J]. Haiyang Xuebao, 2019 , 41 (8) : 115 -124 . DOI: 10.3969/j.issn.0253-4193.2019.08.011
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doi: 10.3969/j.issn.0253-4193.2019.08.011
  • Receive Date：2018-12-04
  • Online Date：2026-04-03
  • Published：2019-08-25
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  • Received：2018-12-04
  • Revised：2019-04-09
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    1 Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
    2 Laboratory for Marine Geology and Environment, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266061, 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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