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Occurrence mechanism of redox sensitive elements in columnar sediments in South Central Okinawa Trough and their environmental implications
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Xiaoyan Xu1, 2, Yanguang Dou2, 3, *, Yong Zhang2, 4, Xiaohui Chen2, 4, Zhilei Sun2, 4, Fenglong Bai2, 4, Bin Zhai2, 4, Libo Wang2, 4, Liang Zou2, 4
Haiyang Xuebao | 2022, 44(10) : 63 - 79
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Haiyang Xuebao | 2022, 44(10): 63-79
• Article •
Occurrence mechanism of redox sensitive elements in columnar sediments in South Central Okinawa Trough and their environmental implications
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Xiaoyan Xu1, 2, Yanguang Dou2, 3, *, Yong Zhang2, 4, Xiaohui Chen2, 4, Zhilei Sun2, 4, Fenglong Bai2, 4, Bin Zhai2, 4, Libo Wang2, 4, Liang Zou2, 4
Affiliations
  • 1. College of Marine Science and Technology, China University of Geosciences (Wuhan), Wuhan 430074, China
  • 2. Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266237, China
  • 3. Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
  • 4. Laboratory for Marine Mineral Resource, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
Published: 2022-10-01 doi: 10.12284/hyxb2022186
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Changes in the content of redox sensitive elements (RSE) in sediments are good surrogate indicators for the redox environment of the overlying water. The RSE in the columnar sediments under complex environmental backgrounds through the grain size, total organic carbon and total nitrogen and its isotopes contents, and redox sensitive elements contents of the two columnar sediments (30 cm) in South Central Okinawa Trough are explored in this paper. And to explore the occurrence mechanism and environmental indication significance. The study found that in addition to the depletion of Cr in the columnar sediments, other RSEs showed different degrees of enrichment. The “grain size effect” has little effect on the RSE content of columnar sediments in the Okinawa Trough; analysis and judgment show that seawater surface productivity is the main factor affecting the redox environment of sediments, and RSE is achieved through the adsorption or desorption of Mn (hydrogen) oxides enrichment and loss. Indicators such as δCe, V/(V+Ni), Ni/Co and V/Cr indicate that the sediment is in an oxic-dysoxic water environment. The Mn element in the sediment diffuses upward in the form of Mn2+ through reduction, and is oxidized and enriched by oxygen-containing interstitial water at 25−30 cm to form a manganese peak. The 0−25 cm columnar sediment is in an oxic water column, and 25−30 cm is in a dysoxic water column.

environmental implications  /  redox sensitive element  /  Mn (hydrogen) oxide  /  columnar sediments  /  Okinawa Trough
Xiaoyan Xu, Yanguang Dou, Yong Zhang, Xiaohui Chen, Zhilei Sun, Fenglong Bai, Bin Zhai, Libo Wang, Liang Zou. Occurrence mechanism of redox sensitive elements in columnar sediments in South Central Okinawa Trough and their environmental implications[J]. Haiyang Xuebao, 2022 , 44 (10) : 63 -79 . DOI: 10.12284/hyxb2022186
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Year 2022 volume 44 Issue 10
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Article Info
doi: 10.12284/hyxb2022186
  • Receive Date：2022-02-09
  • Online Date：2026-02-02
  • Published：2022-10-01
Article Data
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History
  • Received：2022-02-09
  • Revised：2022-06-22
Funding
Affiliations
    1. College of Marine Science and Technology, China University of Geosciences (Wuhan), Wuhan 430074, China
    2. Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266237, China
    3. Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
    4. Laboratory for Marine Mineral Resource, 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
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Number of
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Number of
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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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