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Swiss Journal of Geosciences
Fig. 7 | Swiss Journal of Geosciences

Fig. 7

From: Origins of hydrocarbons in the Geneva Basin: insights from oil, gas and source rock organic geochemistry

Fig. 7

Biomarker diagrams: a Cross-plot of pristane/n-C17 versus phytane/n-C18 (after Hunt 1996); b Ternary diagram showing the relative abundances of C27, C28, and C29 regular steranes for Lower Jurassic and Carboniferous samples and the Roulave bitumen seep. The sterane composition of the bitumen seep from the Roulave stream indicates a marine origin, equivalent to the composition of the Lower Jurassic samples

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