Gas Seepage along the Edge of the Aquitaine Shelf (France): Origin and Local Fluxes

Figure 4

Diagrams for the study venting gases of the Aquitaine Shelf of (a) versus methane to (ethane and propane) molecular composition ratio (modified after Bernard et al., 1978); (b) versus (modified after Schoell, 1983, and Whiticar, 1999); and (c) versus (modified after Bernard et al., 1978).

(a)

(b)

(c)