Articles | Volume 22, issue 3
https://doi.org/10.5194/bg-22-767-2025
https://doi.org/10.5194/bg-22-767-2025
Research article
 | 
12 Feb 2025
Research article |  | 12 Feb 2025

Influence of minor hydrocarbon seepage on sulfur cycling in marine subsurface sediments

Ellen Schnabel, Aurèle Vuillemin, Cédric C. Laczny, Benoit J. Kunath, André R. Soares, Alexander J. Probst, Rolando Di Primio, Jens Kallmeyer, and the PROSPECTOMICS Consortium

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Cited articles

Abrams, M. A.: Marine seepage variability and its impact on evaluating the surface migrated hydrocarbon seep signal, Mar. Petrol. Geol., 121, 104600, https://doi.org/10.1016/j.marpetgeo.2020.104600, 2020. 
Argentino, C., Waghorn, K. A., Bünz, S., and Panieri, G.: Sulfate reduction and anaerobic oxidation of methane in sediments of the South-Western Barents Sea, Biogeosciences Discuss. [preprint], https://doi.org/10.5194/bg-2021-58, 2021a. 
Argentino, C., Waghorn, K. A., Vadakkepuliyambatta, S., Polteau, S., Bunz, S., and Panieri, G.: Dynamic and history of methane seepage in the SW Barents Sea: new insights from Leirdjupet Fault Complex, Sci. Rep., 11, 4373, https://doi.org/10.1038/s41598-021-83542-0, 2021b. 
Berg, P., Risgaard-Petersen, N., and Rysgaard, S.: Interpretation of measured concentration profiles in sediment pore water, Limnol. Oceanogr., 43, 1500–1510, https://doi.org/10.4319/lo.1998.43.7.1500, 1998. 
Beulig, F., Roy, H., McGlynn, S. E., and Jorgensen, B. B.: Cryptic CH(4) cycling in the sulfate-methane transition of marine sediments apparently mediated by ANME-1 archaea, ISME J., 13, 250–262, https://doi.org/10.1038/s41396-018-0273-z, 2019. 
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This study analysed marine sediment samples from areas with and without minimal hydrocarbon seepage from reservoirs underneath. Depth profiles of dissolved chemical components in the pore water and molecular biological data revealed differences in microbial community composition and activity. These results indicate that even minor hydrocarbon seepage affects sedimentary biogeochemical cycling in marine sediments, potentially providing a new tool for the detection of hydrocarbon reservoirs.
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