Figure F31. Methane (CH4) concentration in sediments based on headspace (HS) and pressure core sampler (PCS) data at Site 1247. 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 shaded areas indicate the uncertainties in the position of the boundaries.

Figure F31. Methane (CH₄) concentration in sediments based on headspace (HS) and pressure core sampler (PCS) data at Site 1247. 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 shaded areas indicate the uncertainties in the position of the boundaries.