| 九龙江河口沉积物中硫酸盐还原与甲烷厌氧氧化:同位素地球化学证据 |
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| 引用本文： | 尹希杰,陈坚,郭莹莹,孙治雷,邵长伟.九龙江河口沉积物中硫酸盐还原与甲烷厌氧氧化:同位素地球化学证据[J].海洋学报,2011,33(4):121-128. |
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| 作者姓名： | 尹希杰 陈坚 郭莹莹 孙治雷 邵长伟 |
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| 作者单位： | 1.国家海洋局 第三海洋研究所 海洋与海岸地质环境开放实验室,福建 厦门361005 |
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| 基金项目： | 国家海洋局第三海洋研究所基本科研业务费专项资金资助项目(海三科2009013);国家海洋局第三海洋研究所基本科研业务费专项资金资助项目(2009056);流域-河口区生态安全评价与调控技术研究(200805064)。 |
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| 摘 要： | 通过沉积物柱孔隙水中甲烷,SO2-4,Cl-,δc(34S-SO2-4)、δc(13 C-CH4)的垂直分布特征,研究了硫酸盐还原和甲烷厌氧氧化(anaerobic oxidation of methane,简称AOM)过程在九龙江河口沉积物中的分布规律.测定结果显示两个站位(J-A和J-E)间隙水中SO2-4浓度随深...
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| 关 键 词： | 硫酸盐还原 甲烷厌氧氧化 硫酸盐—甲烷过渡带(SMT) 九龙江河口 |
| 收稿时间： | 2010/7/19 0:00:00 |
Sulfate reduction and methane anaerobic oxidation: isotope geochemical evidence from the pore water of coastal sediments in the Jiulong Estuary |
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| YIN Xi-jie,CHEN Jian,GUO Ying-ying,SUN Zhi-lei and SHAO Chang-wei.Sulfate reduction and methane anaerobic oxidation: isotope geochemical evidence from the pore water of coastal sediments in the Jiulong Estuary[J].Acta Oceanologica Sinica (in Chinese),2011,33(4):121-128. |
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| Authors: | YIN Xi-jie CHEN Jian GUO Ying-ying SUN Zhi-lei and SHAO Chang-wei |
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| Institution: | 1.Open Laboratory of Ocean & Coast Environmenttal Geology, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China2.Key Laboratory of Ministry of Land and Resources for Marine Dil-gas Resources and Environmental Geology, Qingdao Institute of Marine Geology, Qingdao 266071, China3.Shandong Province Geophysical and Geochemical Exploration Institute,Jinan 250031,China |
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| Abstract: | The spatital distrubution of sulfate reduction and anaerobic oxidation of methane (AOM) was investigated in the Jiulong estuarine sediment based on the concentration profiles of geochemical parameters, including sulfate, methane, δc(34S-SO42-), δc(13C-CH4) and chlorine in pore water. Sulfate concentrations in pore water decrease remarkably with the depth. The sulfate is consumed completely at depth intervals 55 and 130 cm at two stations (J-A and J-E). There is no significant change for chloride concentration through the depth of the cores. The δ34S values of sulfate increase with the depth in both cores. It is suggested that sulfate reduction occurs within the upper 55 and 130 cm in the sediment at Stas J-A and J-E, respectively. Methane concentrations sharply increase at the depth of sulfate-methane transition (SMT), and the δc(13C-CH4) values become heavier due to the AOM. Overall, these data suggest methane is consumed mainly by anaerobic oxidation at the SMT. There is obvious positive correlation between the depth of the SMT and the salinity of overlying water at two stations. It is assumed that the depth of the SMT is mainly controlled by the gradient of sulfate which is controlled by the salinity of the overlying water in the Jiulong Estuary. |
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| Keywords: | sulfte reduction anaerobic oxidation of methane sulfate methane transition Jiulong Estuary |
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