Burwicz, Ewa , Rüpke, Lars and Wallmann, Klaus (2014) Numerical modeling of the co-existence of dissolved and gaseous methane in the Blake Ridge site - implications for gas hydrate accumulation dynamics. [Talk] In: 12. International Conference on Gas In Marine Sediments (GIMS12). , 01.-04.09.2014, Taipei, Taiwan .

Abstract

This study provides new insights into the complex three- phase system of the Blake Ridge site, offshore South Carolina. A new numerical reaction- transport model has been applied to better understand: 1) the co- existence of dissolved and gaseous methane within the Gas Hydrate Stability Zone (GHSZ) (Guerin et al., 1999, Taylor et al., 2000), and 2) the origin and nature of high methane fluxes associated with the presence of cold seeps and venting sites (Paull and Matsumoto, 2000). Based on our numerical simulation accounting for sediment deposition and compaction, microbial processes of methane oxidation via sulfate reduction (AOM), methanogenesis and organic matter degradation, we would like to present a new scenario of gas hydrate crystallization within the time frame of a basin history.

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