A novel triterpenoid carbon skeleton in immature sulphur-rich sediments

Investigating pathways of diagenetic organic matter sulfurization using compound-specific sulfur isotope analysis

“…Because CSSIA requires such large samples, a pilot study was undertaken using easily available samples before we attempted to apply our new CSSIA methodology to the more-limited Cariaco Basin core samples obtained from the Ocean Drilling Program. For this pilot study, we used fresh outcrop material from the Miocene Monterey Formation in which OS compounds had previously been identified (Shell Beach sampling site, see Schouten et al, 1995b for details). These samples contained multiple OSC that would have to be separated prior to isotopic analysis, which made them appropriate ''test" samples to prepare for the Cariaco materials.…”

“…doi:10. 1016/j.gca.2008.04.033 the macromolecular matrix of organic-rich deposits (Aizenshtat et al, 1983;Sinninghe Damsté et al, 1988;Adam et al, 1991;Kohnen et al, 1991b;Schouten et al, 1995b). S-S bonds are known to be cleaved more easily than C-S or C-C bonds (Orr, 1986;Eglinton et al, 1990;Baskin and Peters, 1992;Aizenshtat et al, 1995;Koopmans et al, 1998), thus the form and content of the sulfur present in the original organic-rich sedimentary deposit has a significant impact on the kinetics of petroleum formation (Lewan, 1993(Lewan, , 1998Krein and Aizenshtat, 1995;Putschew et al, 1998).…”