Efficiency of extraction of polycyclic aromatic hydrocarbons from the Paleoproterozoic Here's Your Chance Pb/Zn/Ag ore deposit and implications for a study of Bitumen II

► Sequential Soxhlet extraction performed on a 1.64 Ga Pb-Zn-Ag ore sample. ► Results compared with Bitumen II extracted from a similar sample. ► Extraction efficiency decreased for high molecular weight aromatics. ► Maturity parameters lower for Bitumen II and final sequential extraction. ► Composition of Bitumen II cannot be explained by bitumen remaining after extraction.