The influence of source depositional conditions on the hydrocarbon and nitrogen compounds in petroleum from central Montana, USA

The source information that can be extracted from biomarkers and aromatic hydrocarbons suggests that primary migration and compositional fractionation during expulsion has exerted little influence on this fraction of petroleum. Meanwhile, primary migration and compositional fractionation during expulsion appear to effect the carbazole and benzocarbazole distributions thereby limiting their application as indicators for source rock facies composition.