CHANG Xiangchun*, HAN Zuozhen, SHANG Xiaofei, and YAN Chengpeng

Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals,

Shandong University of Science and Technology, Qingdao 266510, China

Abstract 　 Abundant aromatic fractions were detected in oils from the Linnan subsag, including aphthalenes, phenanthrenes, triaromatic steroids, biphenyl, fluorenes, dibenzothiophenes, dibenzofuranes, as well as some typical higher plant-sourced compounds, such as pyrene, benzopyrene, fluoranthene, chryaene, benzofluoranthrene, perylene and cadalene. Occurrences of biomarkers indicate that oils from the Linnan subsag are typical terrestrially genetic oils. Developed in the depositional environment is a strong reduction condition typical of brackish-saline lake. Thermal evolution has entered into the mature-high mature stage.

Key words crude oil; aromatic hydrocarbon; Linnan subsag; biomarker; geochemistry

* Corresponding author, E-mail:xcchang@sina.com

CHINESE JOURNAL OF GEOCHEMISTRY  Vol. 30, No. 4, 2011, page 132-137

© Science Press and Institute of Geochemistry, CAS and Springer-Verlag Berlin Heidelberg 2011