Systematic variations in the 13C contents of individual extractable n-alkanes (C16-C29) can be modelled quantitatively and interpreted as indicating contributions from at least five distinct sources. These appear to be cyanobacterial (C16-C18, delta 13C = -37% vs PDB), phytoplanktonic (C16-C23, delta = -32%), chemoautotrophic bacterial (C20-C29, delta = -38%), phytoplanktonic or heterotrophic bacterial (C20-C29, delta = -30%), and vascular plants (C23-C29, delta = -29%). Hydrous pyrolysis of related kerogens yields large quantities of additional n-alkanes with different and much more uniform delta values. The latter materials are apparently derived from the thermolysis of aliphatic biopolymers whose presence in the Green River Oil Shale has been recognized visually.

中文翻译：

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格林河组（科罗拉多州皮斯恩斯河盆地）降落伞溪成员盐水部分中正烷烃来源的部分解析

单个可提取正构烷烃 (C16-C29) 的 13C 含量的系统变化可以定量建模并解释为表明来自至少五个不同来源的贡献。这些似乎是蓝细菌（C16-C18，delta 13C = -37% vs PDB），浮游植物（C16-C23，delta = -32%），化学自养细菌（C20-C29，delta = -38%），浮游植物或异养细菌 (C20-C29, delta = -30%) 和维管植物 (C23-C29, delta = -29%)。相关干酪根的水热解产生大量具有不同且更均匀的δ值的额外正烷烃。后一种材料显然来自脂族生物聚合物的热解，其在格林河油页岩中的存在已被目视识别。