Figure F85. C2/C1 ratios plotted against δ13C-CH4 to qualitatively elucidate possible diffusion fractionation vs. mixing of gases from different sources (after Prinzhofer and Pernaton, 1997). Data from Holes C0002F (Strasser et al., 2014b) and C0002N. GC-NGA = gas chromatograph–natural gas analyzer.
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