Figure F33. Methane (CH4) concentration in sediments based on headspace (HS) and pressure core sampler (PCS) data at Site 1250. Estimated theoretical solubility of methane in pore water (extrapolated from values calculated for higher pressures; depths) (Handa, 1990; Duan et al., 1992) is shown and fields of dissolved methane (D), methane hydrate (H), and free methane (F) are depicted. The gray areas indicate the uncertainties in the position of the boundaries.

Figure F33. Methane (CH₄) concentration in sediments based on headspace (HS) and pressure core sampler (PCS) data at Site 1250. Estimated theoretical solubility of methane in pore water (extrapolated from values calculated for higher pressures; depths) (Handa, 1990; Duan et al., 1992) is shown and fields of dissolved methane (D), methane hydrate (H), and free methane (F) are depicted. The gray areas indicate the uncertainties in the position of the boundaries.