Previous   |    Close   |    Next

Figure F52. Mass chromatograms of the ions m/z 191 for hopanes and other pentacyclic triterpenoids for samples of ASTEX-S SAS (drilling additive), the extract from a sandstone in interval 337-C0020A-16R-2, 12–45 cm, and the extract from a siltstone in interval 337-C0020A-15R-5, 0–21 cm. The sandstone sample contains a hopane distribution that is a mix of the organic-rich lithology above and the SAS drilling additive. αβ = 17α,21β(H) hopane; ββ = 17β,21β(H) hopane.

Previous   |    Close   |    Next   |    Top of page