茂名油页岩中生物输入的标志化合物

B1OMARKER COMPOUNDS OF BIOLOGICAL INPUTS IN MAOMING OIL SHALE

我国油气的绝大部分产自东部地区的白垩纪与第三纪合油气盆地，其沉积环境多为陆相，陆源高等植物输入较丰富，介质条件以淡水一半咸水为主。在这方面茂名油页岩具有典型的代表性，因而深入研究其生物标志物特征与有机输入模式，对建立适用于我国油气勘探的分子有机地化参数以及发展我国陆相生油理论具有重要的现实意义。

The Maoming oil shale is a typical sediment of fresh water environment. At the lowermost of the oil shale occur a few thin brown coal beds. From the top to the brown coal beds, inputs of high plants increase and those of aquatic organisms decrease; he-nce this formation is considered a good profile for the study of inputs of organisms. Field geological study and organic petrographical research were preliminarily conducted on the profile.Our research has focussed on abundant biomarker compounds in the Maoming oil shale-brown coal formation, and reported some new biomarkers for the first time in China, such as botryococcane, homofernene, de-A-lupane, hopene, oleanene, etc. In terms of regular changes in biomarker composition in the profile, key biomarkers of organic inputs have been indicated. A few biomarkers are typical of high plants, such as ol-ean-12-ene, olean-18-ene and de-A-lupane, and those typical of aquatic organism inputs include 4-methyl sterane (especially C28), 4-methyl diasterene, botryococcane and homo-fernene. 4-methyl sterane may be derived from dinoflagellate, while botryococcane co-mes from Botryococcus.Reported for the first time in the present paper are a series of botryococcanes (up to 8 compounds), of which the molecular structure is under study.