摘要
羌塘盆地沉积了多套富含有机质的海相黑色岩系。虽然针对黑色岩系的研究取得了系列成果,但关于胜利河油页岩的沉积环境、有机质来源、热演化程度和生物降解程度等系列问题仍需要进一步讨论。本文针对胜利河油页岩开展了芳烃色谱、质谱分析,讨论胜利河油页岩中芳烃化合物分布特征和意义。研究结果显示:1)胜利河油页岩样品中含有154种芳烃类化合物,其中含量最高的是菲系列化合物,其次是芴系列化合物,其他系列化合物含量较少;芳烃化合物分布具有典型前锋型特征。2)芳烃化合物组成以及相对丰度指示胜利河油页岩生油母质主要来源于低等海生生物,同时检测到一定含量源自于高等植物先质的1,2,5-TMNr、1,2,5,6-TeMNr、海稀松和联苯等化合物,表明高等植物对胜利河油页岩形成有一定贡献,但极其有限。3)高丰度的硫芴和9-甲基菲系列化合物显示胜利河油页岩形成于高还原条件的海相环境,同时O/(O+C)芴系列与S/(S+C)芴系列关系图、硫芴系列/氧芴系列与Pr/Ph关系图也证实了这一点。4)MPI1、Rc、BF/BeP、4-MDBT/ΣMDBT、DBT/(DBT+MDBT)等成熟度参数综合显示胜利河油页岩处于低成熟—成熟阶段。
The organic-rich marine sediments,commonly referred to as black shales were deposited in Qiangtang basin.Although serial achievements about the balck shales have been remarkable,the depositional environment,source of organic matter,thermal maturity and biodegradation are still a matter of discussions.In this paper,study on chromatogram and mass spectrum of aromatic hydrocarbon in Shenglihe oil shale,the aromatic hydrocarbon distribution characteristics and significance are carried out.The result shows that 1)the oil shale contains 154 kinds of aromatic hydrocarbon of which the majority are phenanthrene series,then Terfluorene series and the other kinds less and the aromatic carbonates are characterized by frontier distribution;2)the aromatic hydrocarbon composition and the relative abundance is the indicator of their derivation from lower class of marine organism and on the other hand is detected a certain amount of the higher class plant-derived 1,2,5-TMNr、1,2,5,6-TeMNr and pimanthrene and Biphenyl et al,which are the indicator of very limited contribution of the higher class of plants;3)The high abundance of DBT and 9-MP series indicate that the Shenglihe oil shale is deposited in marine reducing sedimentary environment and at the same time the ratio of O/(O+C)vs S/(S+C)and the ratios of S/O vs Pr/Ph also confirm this conclusion.The maturity parameters,such as MPI1,Rc,BF/BeP,4-MDBT/ΣMDBT,DBT/(DBT+MDBT)and so on,indicate that the organic matter remains at low maturity-maturity.
作者
姜德民
季长军
JIANG Demin;JI Changjun(The Third Geological Brigade of Jiangsu Geology& Mineral Exploration Bureau, Zhenjiang 212000, Jiangsu, China;Chinese Academy of Geological Sciences, Beijing 100037, China)
出处
《地质找矿论丛》
CAS
CSCD
2020年第2期197-203,共7页
Contributions to Geology and Mineral Resources Research
关键词
芳烃化合物
油页岩
胜利河
羌塘盆地
aromatic hydrocarbon
oil shale
Shenglihe
Qiangtang Basin
