辽东湾地区C30甲藻甾烷的检出及其地质意义  

DETECTION AND STUDY OF C_(30) DINOSTERANES IN LIAODONG BAY

作　　者：傅宁[1] 

机构地区：[1]海洋石油勘探开发研究中心，河北高碑店074010

出　　处：《中国海上油气（地质）》1995年第5期301-306,共6页China Offshore Oil and Gas(Geology)

摘　　要：用GC／MS分析辽东湾地区下第三系烃源岩及原油样品，检测出丰富的C30甲藻甾烷和C28－304－甲基甾烷。根据色谱保留时间、质谱特征及与文献对比，确认出4α、23，24（R）－三甲基胆甾烷（20R）与4β，23，24（R）－三甲基胆甾烷（20R）结构及6个相应的C30甲藻甾烷异构件。研究表明，甲藻甾烷不仅是海相环境的生物标志物，而且也是湖相咸水～半咸水沉积环境的生物标志物，在研究有机质的生源、沉积环境及油源对比中有特殊意义。The samplas of Palaeogene source rocks and oils in Liaoclong Bay Basin are analysed by GC/ MS and C30 dinosteranes, C28-C304-methylsteranes are detected. Based on the retention time of GC, mass spectrum characteristics and compared with other literatures, two C30 dinosteranes (i. e. 4α,23,24(R)-trimethyl-cholestane (20R). 4β, 23, 24 (R)-trimethyl-cholestane (20R)) , six C30 dinosteranes isomer are identified. Dinosteranes are not only biomarkers in marine environment, but also ones in lacustrine saline and brackish water sedimentary environments. It has a special signifi-camce in studying both the soure depositional environment and source rock/oil correlation.

关 键 词：地质意义 辽东湾地区 生油岩 下第三系 甲藻甾烷 半咸水湖相沉积 GC/MS 油气勘探 

分 类 号：P618.13[天文地球—矿床学] TE13[天文地球—地质学]