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      Sulfate-Methane Transition Depths and Its Implication for Gas Hydrate

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          Abstract

          The biological removal of CH 4 by methanotrophic (CH4-oxidizing) archaea always occurs at a distinct zone which is known as sulfate-methane transition zone (SMTZ). It is an important indication for high methane flux and gas hydrate occurrence. In this study, we collected pore-water data from South China Sea, Carolina Rise and Blake Ridge to analyze the relationship between CH 4, SO 4 2– concentration and depth. We found that below the SMTZ, the methane concentration increases continuously with depth and sulfate concentration decrease linearly to zero. In addition, the geochemical data taken from all these sites show that SMTZ is relatively shallow (less than 20 m), which may indicate that these areas have high methane flux.

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          Most cited references 18

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          Gas hydrates-geological perspective and global change

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            Biogeochemical cycling in an organic-rich coastal marine basin—I. Methane sediment-water exchange processes

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              Marine pore-water sulfate profiles indicate in situ methane flux from underlying gas hydrate

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                Author and article information

                Journal
                JOUC
                Journal of Ocean University of China
                Science Press and Springer (China )
                1672-5182
                10 July 2020
                01 August 2020
                : 19
                : 4
                : 837-842
                Affiliations
                1Key Laboratory of Submarine Sciences and Prospecting Techniques, Ministry of Education, and College of Marine Geosciences, Ocean University of China, Qingdao 266100, China
                Author notes
                *Corresponding author: LI Guangxue, E-mail: estuary@ 123456ouc.edu.cn
                Article
                s11802-020-4490-5
                10.1007/s11802-020-4490-5
                Copyright © Ocean University of China, Science Press and Springer-Verlag GmbH Germany 2020.

                The copyright to this article, including any graphic elements therein (e.g. illustrations, charts, moving images), is hereby assigned for good and valuable consideration to the editorial office of Journal of Ocean University of China, Science Press and Springer effective if and when the article is accepted for publication and to the extent assignable if assignability is restricted for by applicable law or regulations (e.g. for U.S. government or crown employees).

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                Self URI (journal-page): https://www.springer.com/journal/11802

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