| 冲绳海槽北部氧化还原敏感元素的早期成岩过程 |
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| 引用本文： | 王小静,李力,刘季花,吴永华,高晶晶,曹鹏,张颖,石学法.冲绳海槽北部氧化还原敏感元素的早期成岩过程[J].海洋学报(英文版),2019,38(12):14-25. |
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| 作者姓名： | 王小静 李力 刘季花 吴永华 高晶晶 曹鹏 张颖 石学法 |
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| 作者单位： | 自然资源部第一海洋研究所 海洋沉积与环境地质重点实验室, 青岛 266061,自然资源部第一海洋研究所 海洋沉积与环境地质重点实验室, 青岛 266061;1. 自然资源部第一海洋研究所 海洋沉积与环境地质重点实验室, 青岛 266061,自然资源部第一海洋研究所 海洋沉积与环境地质重点实验室, 青岛 266061;青岛海洋科学与技术试点国家实验室 海洋地质过程与环境功能实验室, 青岛 266237,自然资源部第一海洋研究所 海洋沉积与环境地质重点实验室, 青岛 266061,自然资源部第一海洋研究所 海洋沉积与环境地质重点实验室, 青岛 266061,自然资源部第一海洋研究所 海洋沉积与环境地质重点实验室, 青岛 266061,自然资源部第一海洋研究所 海洋沉积与环境地质重点实验室, 青岛 266061,自然资源部第一海洋研究所 海洋沉积与环境地质重点实验室, 青岛 266061;青岛海洋科学与技术试点国家实验室 海洋地质过程与环境功能实验室, 青岛 266237 |
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| 基金项目： | The National Key Basic Research Program of China under contract No. 2013CB429704; the NSFC-Shandong Joint Fund for Marine Science Research Centers under contract No. U1606401; the National Natural Science Foundation of China under contract No. 41776095; the National Program on Global Change and Air-Sea Interaction under contract No. GASI-GEOGE-03. |
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| 摘 要： | The early diagenesis processes of several redox-sensitive trace metals(RSMs)(Mo, U and V) were studied with several short sediment cores(～25 cm) collected in the northern Okinawa Trough(OT). Pore water vertical profiles indicated that the sedimentary environments in all cores were between oxic and suboxic, not yet reaching anoxic sulfidic conditions. The recycling process of Mo in sediments was clearly associated with Mn and yielded little authigenic accumulation, while U showed a downcore increase in sediment and its authigenic mass accumulation rate(MAR) was estimated to be ～23% of the Changjiang(Yangtze) and Huanghe(Yellow) riverine flux. Benthic diffusive fluxes and MAR were calculated and the comparison of them showed that U and V fluxes matched relatively well both in direction and in magnitude, implying that diffusion processes at the sedimentwater interface is the dominant process controlling the remobilization or burial of V and U in northern OT. This work provided a systematic study(both in pore water and solid phase) on the RSMs geochemical behaviors during early diagenesis process, yielding a quantitative assessment of the remobilization or burial fluxes of the RSMs in northern OT. Such studies are in general lacking in the coastal margin of Northwest Pacific Ocean.
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| 关 键 词： | 早期成岩过程 钼 铀 钒 孔隙水 沉积物 冲绳海槽 |
| 收稿时间： | 2018/9/27 0:00:00 |
Early diagenesis of redox-sensitive trace metals in the northern Okinawa Trough |
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| Wang Xiaojing,Li Li,Liu Jihu,Wu Yonghu,Gao Jingjing,Cao Peng,Zhang Ying and Shi Xuefa.Early diagenesis of redox-sensitive trace metals in the northern Okinawa Trough[J].Acta Oceanologica Sinica,2019,38(12):14-25. |
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| Authors: | Wang Xiaojing Li Li Liu Jihu Wu Yonghu Gao Jingjing Cao Peng Zhang Ying and Shi Xuefa |
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| Institution: | Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China;Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China;Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China |
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| Abstract: | The early diagenesis processes of several redox-sensitive trace metals (RSMs) (Mo, U and V) were studied with several short sediment cores (~25 cm) collected in the northern Okinawa Trough (OT). Pore water vertical profiles indicated that the sedimentary environments in all cores were between oxic and suboxic, not yet reaching anoxic sulfidic conditions. The recycling process of Mo in sediments was clearly associated with Mn and yielded little authigenic accumulation, while U showed a downcore increase in sediment and its authigenic mass accumulation rate (MAR) was estimated to be ~23% of the Changjiang (Yangtze) and Huanghe (Yellow) riverine flux. Benthic diffusive fluxes and MAR were calculated and the comparison of them showed that U and V fluxes matched relatively well both in direction and in magnitude, implying that diffusion processes at the sediment-water interface is the dominant process controlling the remobilization or burial of V and U in northern OT. This work provided a systematic study (both in pore water and solid phase) on the RSMs geochemical behaviors during early diagenesis process, yielding a quantitative assessment of the remobilization or burial fluxes of the RSMs in northern OT. Such studies are in general lacking in the coastal margin of Northwest Pacific Ocean. |
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| Keywords: | diagenesis molybdenum uranium vanadium pore water sediment Okinawa Trough |
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