Detection and Geological Significance of Carbazole Compounds in the Pyrolysis Product of Dunaliella Salina

Key words: 
• Dunaliella Salina

Abstract: It is discovered that series of carbazole compounds, including carbazole, lmethylcarbazole, 2methylcarbazole, 3methylcarbazole, 4methylcarbazole, 5methylcarbazole, 6methylcarbazole, which are affluent in the pyrolysis product of Dunaliella Salina. The relative content of the series of carbazole compounds in the aromatic hydrocarbon fraction mounts to 30.97％ at 300℃,while it is only 15.44％ at 350℃, and it rarely occured at 250℃.
On one hand, it indicates that Dunaliella Salina is one of the primary parent materials of carbazole compounds in source rock and crude oil; On the other hand, it suggests that the crude oil derived from Dunaliella Salina is probably rich in carbazole compounds under a highlyrich salt environment, which provides strong evidence to contrast crude oil with original source rock in this environment.