Research Article
Gas Seepage along the Edge of the Aquitaine Shelf (France): Origin and Local Fluxes
Table 1
Molecular and isotopic compositions of the sampled gases of the Aquitaine Shelf seeps.
| Sample | CH4% mol | C2H6% mol | C3H8% mol | iC4H10% mol | nC4H10% mol | CO2% mol | ‰ | ‰ | ‰ | ‰ | δD‰ | ‰ |
| GZ2-pl535-PZ01-01 | 99.967 | 0.000313 | 0.000067 | 0.000015 | 0.000094 | 0.032 | −66.8 | −40.9 | −29.4 | −24 | −181 | 42.8 | GZ2-pl535-PZ02-03 | 99.948 | 0.000464 | 0.000056 | 0.000005 | 0.000110 | 0.051 | −68.1 | −41.9 | −28.3 | −34 | −181 | 34.1 | GZ2-pl535-PZ03-05 | 99.979 | 0.000600 | 0.000102 | 0.000023 | 0.000136 | 0.020 | −69.3 | −49.1 | −30.1 | −14 | −179 | 55.3 | GZ2-pl536-PZ01-06 | 99.988 | 0.000357 | 0.000051 | 0.000008 | 0.000100 | 0.012 | −71.2 | | | | −180 | | GZ2-pl536-PZ02-08 | 99.985 | 0.000368 | 0.000054 | 0.000005 | 0.000083 | 0.015 | −72.7 | −42.7 | −28.3 | −24 | −182 | 48.7 | GZ2-pl537-PZ01-09 | 99.985 | 0.000429 | 0.000043 | 0.000004 | 0.000075 | 0.014 | −68.6 | | | | −181 | | GZ2-pl537-PZ02-11 | 99.985 | 0.000423 | 0.000042 | 0.000002 | 0.000089 | 0.015 | −66.1 | −45.6 | −27.9 | −24 | −178 | 42.1 | GZ2-pl537-PZ03-13 | 99.983 | 0.000435 | 0.000051 | 0.000083 | 0.000105 | 0.016 | −68.8 | | | | −182 | | GZ2-pl537-PZ04-12 | 99.990 | 0.000359 | 0.000042 | 0.000003 | 0.000123 | 0.010 | −69.1 | | | | −182 | |
|
|