Advances in Earth Science ›› 2013, Vol. 28 ›› Issue (7): 765-773. doi: 10.11867/j.issn.1001-8166.2013.07.0765

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Anaerobic Oxidation of Methane (AOM) and Its Influence on Inorganic Sulfur Cycle in Marine Sediments

Wu Zijun, Ren Dezhang, Zhou Huaiyang   

  1. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
  • Received:2012-12-14 Revised:2013-05-20 Online:2013-07-10 Published:2013-07-10

Wu Zijun, Ren Dezhang, Zhou Huaiyang. Anaerobic Oxidation of Methane (AOM) and Its Influence on Inorganic Sulfur Cycle in Marine Sediments[J]. Advances in Earth Science, 2013, 28(7): 765-773.

The process of AOM plays a significant role in regulating the global balance of methane budget and reducing the greenhouse effect driven by methane emission into atmosphere. Therefore, AOM occurring in marine sediments has become a hot research topic of biogeochemistry in recent years. Generally,sulfate reduction occurs mainly through two pathways, e.g., oxidation organic matter and AOM. Currently, a lot of literatures documented the sulfate reduction driven by the organic matter, however, sulfur cycle driven by AOM was seriously underestimated. Here, based on the views of biogeochemistry and isotope geochemistry, we review the biogeochemistry evidence of AOM process occurring and the controlling factors of sulfate reduction through the AOM pathway. The process of AOM can produce H2S and it further react with reactive iron, forming the iron sulfur minerals. Comparing to the surface sediments, the iron sulfur minerals formation due to AOM are not easy oxidation and therefore buried favorably in the marine sediments. Thus, the roles of sulfate reduction and authigenic iron sulfide minerals formation driven by AOM should not be neglected. We hope this review paper will be helpful to better understand the AOM process and sulfur cycle in marine sediments.

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