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The study on the early diagenetic processes in REY-rich sediments in Southeast Pacific Ocean and its indicative significance
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Jiejun Li1, Hongna Liu1, Xiaojing Wang1, Li Li1, 2, 3, *, Xuefa Shi1, 2, 3, *
Haiyang Xuebao | 2024, 46(2) : 40 - 51
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Haiyang Xuebao | 2024, 46(2): 40-51
The study on the early diagenetic processes in REY-rich sediments in Southeast Pacific Ocean and its indicative significance
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Jiejun Li1, Hongna Liu1, Xiaojing Wang1, Li Li1, 2, 3, *, Xuefa Shi1, 2, 3, *
Affiliations
  • 1. Key Laboratory of Marine Geology and Metallogeny, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
  • 2. Laboratory for Marine Geology, Laoshan Laboratory, Qingdao 266237, China
  • 3. Key Laboratory of Deep Sea Mineral Resources Development, Shandong (preparatory), Qingdao 266061, China
Published: 2024-02-29 doi: 10.12284/hyxb2024007
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As potential mineral resources, rare earth elements (REY) and yttrium enriched sediments in the deep sea have attracted a lot of attention in recent years. It has been shown by studies that the enrichment process of REY is most likely to occur at the sediment-water interface (SWI), however studies on the early diagenetic processes in REY-enriched sediments are in general lacking. In this paper, we collected two short sediment cores in REY-enriched sediments in the Southeast Pacific Ocean, then we had conducted an in-depth analysis on the early diagenesis process of REY at SWI and its influence on the enrichment mechanism of REY in deep-sea sediment. The low Fe, Mn concentration and high Mo, U and V concentration in pore-water indicated that the sediment cores were in oxic environment. Compared to the REY in overlying water column, the dissolved REY in pore-water characterized by a middle rare earth elements (MREE). In sediment, phosphate phase is the main phase of REY, while the distribution pattern of REY in pore-water may be controlled by the phosphate content in sediments. Our results show that during the early diagenetic processes, the REY initially combined with Fe/Mn phase and other phases re-released into the pore-water, which is subsequently adsorbed by and eventually buried with the phosphate phase. Therefore, the early diagenetic process is an important mechanism of REY enrichment in deep sea sediments.

early diagenetic process  /  pore-water  /  rare earth elements  /  sediment  /  Southeast Pacific Ocean
Jiejun Li, Hongna Liu, Xiaojing Wang, Li Li, Xuefa Shi. The study on the early diagenetic processes in REY-rich sediments in Southeast Pacific Ocean and its indicative significance[J]. Haiyang Xuebao, 2024 , 46 (2) : 40 -51 . DOI: 10.12284/hyxb2024007
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Year 2024 volume 46 Issue 2
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Article Info
doi: 10.12284/hyxb2024007
  • Receive Date：2023-10-24
  • Online Date：2025-11-25
  • Published：2024-02-29
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History
  • Received：2023-10-24
  • Revised：2023-12-10
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Affiliations
    1. Key Laboratory of Marine Geology and Metallogeny, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
    2. Laboratory for Marine Geology, Laoshan Laboratory, Qingdao 266237, China
    3. Key Laboratory of Deep Sea Mineral Resources Development, Shandong (preparatory), 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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