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The study on geochemical characteristics and enrichment mechanism of deep sea REY-rich sediments in the Central Indian Ocean Basin
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Yi Sun1, 2, 3, Xuefa Shi1, 2, *, Quanshu Yan1, 2, Xijun Liu3, *, Miao Yu1, 2, Mu Huang1, 2, Dongjie Bi1, 2, Jia Li1, 2, Aimei Zhu1, 2, Jingjing Gao1, 2, Hongmin Wang1, 2, Zhaoqi Zhang1, 2, 3
Haiyang Xuebao | 2022, 44(11) : 42 - 62
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Haiyang Xuebao | 2022, 44(11): 42-62
• Article •
The study on geochemical characteristics and enrichment mechanism of deep sea REY-rich sediments in the Central Indian Ocean Basin
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Yi Sun1, 2, 3, Xuefa Shi1, 2, *, Quanshu Yan1, 2, Xijun Liu3, *, Miao Yu1, 2, Mu Huang1, 2, Dongjie Bi1, 2, Jia Li1, 2, Aimei Zhu1, 2, Jingjing Gao1, 2, Hongmin Wang1, 2, Zhaoqi Zhang1, 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, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
  • 3. Guangxi Key Laboratory of Hidden Metallic Ore Deposils Exploration, Guilin University of Technology, Guilin 541004, China
Published: 2022-11-01 doi: 10.12284/hyxb2022135
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In this paper, sediment smear observations, X-ray diffraction analyses, major, trace and rare earth elements analyses, and in situ micro zone geochemical analyses of single minerals were carried out on samples of core GC02 and GC06 from the rare earth-rich deep-sea sediments in the Central Indian Ocean Basin to explore their geochemical characteristics, material sources and enrichment mechanisms of rare earth elements (REY). The results show that the sediment types of core GC02 are calcareous clay and zeolitic clay, and the sediment types of core GC06 are calcareous clay, zeolite-bearing clay and zeolitic clay. Rare earth elements are enriched in zeolite-bearing clays and zeolitic clays. The North American Shale Composite (NASC) Standardized patterns of REY in the sediments indicate a possible seawater origin. Mineralogical and geochemical signatures indicate that the terrestrial fraction of these sediments in the study area should be the eolian dust material originated primarily from Australian. Elemental correlations and CaO/P2O5 ratios indicate that the main host mineral of REY in REY-rich deep-sea sediments is bioapatite (fish teeth/bone), followed by Fe-Mn micronodule. This study summarizes and discusses the formation mechanism of REY-rich sediments and improves a conceptual model for the formation process of REY-rich sediments.

Central Indian Ocean Basin  /  rare earth-rich deep-sea sediments  /  geochemistry  /  rare earth sources  /  REY-host minerals  /  enrichment mechanism
Yi Sun, Xuefa Shi, Quanshu Yan, Xijun Liu, Miao Yu, Mu Huang, Dongjie Bi, Jia Li, Aimei Zhu, Jingjing Gao, Hongmin Wang, Zhaoqi Zhang. The study on geochemical characteristics and enrichment mechanism of deep sea REY-rich sediments in the Central Indian Ocean Basin[J]. Haiyang Xuebao, 2022 , 44 (11) : 42 -62 . DOI: 10.12284/hyxb2022135
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Article Info
doi: 10.12284/hyxb2022135
  • Receive Date：2022-03-14
  • Online Date：2026-02-01
  • Published：2022-11-01
Article Data
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History
  • Received：2022-03-14
  • Revised：2022-05-25
Funding
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, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
    3. Guangxi Key Laboratory of Hidden Metallic Ore Deposils Exploration, Guilin University of Technology, Guilin 541004, 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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